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[META] Big Island Volcanic Activity Megathread

UPDATES ARE NOW TO BE POSTED TO http://goedhartvoordieren.nl/?page=r/Hawaii/comments/8js0b8/meta_big_island_volcanic_activity_megathread_part/

As of 5:30 PM HST Thursday May 3rd, there has been lava flow on Big Island in the Leilani Estates area (http://www.hawaiinewsnow.com/story/38087728/puna-warned-series-of-quakes-could-indicate-eruption-is-possible).

LIVE THREAD http://goedhartvoordieren.nl/?page=live/10vrzj7efqof7

Open Shelters

  • Pahoa Community Center, 15-3022 Kauhale Street, Pahoa, HI 96778

  • Keaau Community Center, 16-186 Pili Mua St, Keaau, HI 96749

Location

Additional Info

Visitor Info

Please note that the only really affected area is the southeast side of the island of Hawaii, AKA The Big Island. If you are flying into either Hilo or Kona, you are not likely to be affected by this event, so long as you are not driving down to Puna. Please check the maps linked above for an idea of where Hilo and Kona are relative to Puna. If you are sensitive to air quality, you may wish to check https://airnow.gov/index.cfm?action=airnow.local_state&stateid=12&tab=0 and http://weather.hawaii.edu/vmap/. Kona is far more likely to experience any air quality issues, due to the way tradewinds travel across the islands.

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Oʻahu
Moderator of r/Hawaii, speaking officiallyOriginal PosterScore hidden · 2 months ago · Stickied comment

This is really cool. Is there a way to crowd source and add pictures? Great Work !!!

One cool way I was thinking you could improve your map (which I really appreciate BTW thanks!) is to add links to videos of said fissures. I see you added some images to the points, which is really helpful in visualizing what's happening each.

In general, these maps have really helped me, as a very spatial person (also a GIS Analyst) to keep track of what's happening and where.

Mainland
2 points · 2 months ago

getting an error

Mainland
1 point · 2 months ago

Hmmm, still getting an Error 400. =[

I found the link won't work in Chrome, but it works okay in Firefox.

Hawaiʻi (Big Island)
1 point · 2 months ago

You getting it at your place in S Kona?

Here's hoping that the winds stay in a southwest direction, and away from Hilo.

Hawaiʻi (Big Island)
3 points · 2 months ago · edited 2 months ago
Hawaiʻi (Big Island)
1 point · 2 months ago

I haven't seen any news about this one yet - have any more info?

Hawaiʻi (Big Island)
3 points · 2 months ago
Oʻahu
2 points · 2 months ago

Very interesting. We'll see if it starts another ocean entry and hopefully no more livelihoods affected.

Hawaiʻi (Big Island)
2 points · 2 months ago

That is my hope.

Oʻahu
3 points · 2 months ago

Yeah, as much as I hate to see all the lives affected, I'm equally excited to hopefully see another ocean entry open up for the sight seeing...and revive the lava tourism business in the area too

Hawaiʻi (Big Island)
5 points · 2 months ago

All of the lives adversely affected is much more important a priority than lava tourism IMO. Right now, the county and island communities should be focusing on the housing crisis and assisting those in need.

Oʻahu
5 points · 2 months ago

100% agreed.

Comment deleted2 months ago

Kona area? Unless the VOG gets really bad, you'll be fine. Might make for some interesting rumbles, occasionally.

Flying to the Big Island this Friday for a week....should I think about canceling? Sorry to ask a question like this at this time.

Hawaiʻi (Big Island)
4 points · 2 months ago

I would recommend keeping your plans and fly on over. Only the southeast side of the island is being impacted by the eruptions. The air quality can get intense at times due to the vog (volcanic smog). Just be mindful of that and make sure to stay hydrated.

Here’s a link with some recommended places to check out and events happening around that time.

http://goedhartvoordieren.nl/?page=r/BigIsland/comments/8en9hg/are_you_visiting_and_looking_for_unique_things_to/

Let me know if you have any other questions.

My wife and I just spent our honeymoon there (began on May 3rd actually). Unless you're planning on staying in the immediate vicinity of the flow, you'll be fine. We stayed in Volcano from May 3rd-8th with no issue.

So the 17th fissure (formerly 18th) has been an interesting one to watch today, thanks to the media folks who were so kind as to pull something like a 16-18 hour day to livestream from a property owner's house (IIRC). A few thoughts:

No, don't know if that's older or fresher lava from 17 yet. Fissure 16 indicated some magma mixing between older and newer magmas. Lava from 16 will be important to look at in more detail if that's indeed the case. Too early to have data from 17 at this point.

Oʻahu
1 point · 2 months ago

Is there a recording of this live stream somewhere?

Yes! Honolulu Civil Beat and WXChasing have all of their livestreamed video available for viewing on their Facebook pages.

Oʻahu
2 points · 2 months ago

oh wow, I did not expect the sounds the fissure is making at all. thank you.

So we keep going back and forth between whether this weekends new fissure was #18 or #17. Are they now just going to refer to it as "Number 17?"

What does potential property damage look like in that area? I'm glad it's moved further away from Leilani, and hopefully that'll slow the expansion of the 2-7-8 flow.

It's officially 17. The original 17 was downgraded after never erupting. It's ultimately better for the official documentation and subsequent research to characterize the fissures that do erupt from other cracks/fissures that don't, at least as far as I understand it. I'll confirm later with colleagues about the naming rules.

As for damage, it looks like there was another structure lost over the weekend, bringing the total to 37 structures destroyed in this eruption. (That article is updated frequently, but I don't think that note will change.) Fissure 17 opened on private property near some homes. The last pictures I saw from yesterday showed them still standing, although my info is from yesterday and might be out of date. Still catching up with developments! Certainly it's a less developed area and fewer structures are currently threatened by spatter and lava flows from 17. No guarantees that this will act as a pressure relief valve for the 2-7-8 fissures, unfortunately. If this does indeed follow the 1955 pattern, we could see activity move up and down the rift. Whether or not that's going to be the case, we're not sure yet.

I just hope for the sake of the folks in Leilani that if it does grow it's to the east (even better if far to the west).

What's going on elsewhere? What are current lava lake levels like at the summit? Anything happening at Pu'u''o'o?

We're hoping that too, but only time will tell for sure.

Halemaʻumaʻu remains low. Actually, I was just looking at this status update. USGS Volcanoes says this in reply to a commenter's question about the lava lake and the summit water table: "We know that the water table is now interacting with the conduit. The persistent steam plume tells us as does the increased amount of hydrogen sulfide (H2S) gas."

It would be really cool if the chamber somehow stayed open. It made me wonder, what is the deepest inactive volcano vent/throat (relative to it's crater's width)?

There is/was a crater just opposite the beginning of Hilina Pali Road called Devil's Throat, which was shaped like an inverted cone - it had a narrow opening on the surface (something like 30 feet?), but grew wider as it went down, and I think was close to 200 feet deep. It's not so striking now, as it's gradually collapsed into a typical vertical-walled crater (which has also partly filled in the bottom)

Not sure, but that's a great question! A quick search shows that you can tour the inside of Thrihnukagigur Volcano in Iceland. Waimea Canyon in Kauai cuts through its shield volcano, and you can hike pretty far down the canyon.

Waimea Canyon is an erosional feature though, not a vent.

Correct - I'm just thinking in general of a couple of places where folks can go down inside a volcano and see some of its stratigraphy. The Iceland example is the best example of going into a vent that I could find with a quick search (was at work and the last thing I needed was to go down another rabbit hole!), but I also have a soft spot for Waimea and couldn't help including it. : )

Fissure 18 seems quite a bit more active and hotter than the rest. Good thing it was further away from town.

Anyone's travel plans ruined? Tell me more.

I wanted to see lava. For 30 years people could see lava, but now is the most active time in recent history and I didn't see anything. I even got up in a helicopter but fissures 1-15 were just steaming. Then 16-17 opened the day AFTER I left.

Still, at least I can go home to a nice safe place that isn't at risk of being swallowed by molten rock. I feel bad for those in Leilani but I'm also annoyed by the timing.

FWIW (not that it's much comfort I'm sure), there were large parts of the past 35 years when people couldn't see the lava. It only became moderately accessible about two years ago after a long time without really being able to see it up close. Before that, the last time it was really good was back around 2002.

My wife and I chose the Big Island for our honeymoon partially so we could see lava. Somewhat bummed that we didn't get to see any, but there are more important things than tourism, like people's safety. We had never experienced an earthquake before, so that served as our compensation for not seeing lava.

Hawaiʻi (Big Island)
3 points · 2 months ago

7 pm Eruption Update – Fissure 17 Opens

A new fissure, number 17, is opening up about 100 meters below fissure 16. At this time, steam and lava spatter activity has started from this new fissure.

17th fissure confirmed near the 16th fissure, which is starting to shut down.

10 points · 2 months ago

I was surprised to read that each fissure was only active between a couple minutes to a couple hours. I think a lot of us outside Puna were under the impression that the fissures lasted for days each.

Has anyone compiled the data yet that shows the duration that each fissure was open?

USGS mentioned yesterday that the lava that's being erupted currently is actually left over from the 1955 eruption - it's relatively cool and viscous, which is why it's not making much in the way of flows and each vent doesn't last long. The bad news is that that's a sign that more fresh lava is behind it, which will probably come out somewhere eventually. If you look at the history of the 1955 eruption, it followed much the same pattern - a series of small, short-lived fissure breakouts (which may well have been lava left over from the 1840 flow), followed by several major flows that lasted much longer.

http://www.hawaiinewsnow.com/story/38173167/the-lava-thats-been-erupting-in-puna-is-likely-from-a-1955-flow

Dumb question, but how can magma just sit there for 60 years and then suddenly erupt? Why wouldn't it cool down and harden after all that time? And how does it suddenly find the force to break through in all these fissures.

Once it's cooled on the surface, rock is an excellent insulator. That's how lava tubes can carry lava 30 miles from the initial vent and have it still be nearly as hot as when it first came to the surface. And this is coming from deep in the ground (several hundred feet at least), so it's insulated by a lot more than a few feet of new lava.

As far as how it breaks out now, think of it as water in a hose. If you open the faucet, it will flow out the end. Turn it off, and it stops flowing, but the water stays in the hose except where it physically drains by gravity. When you turn it on again - i.e., when new lava starts moving down the rift zone - what comes out first is what was already in there. The new water doesn't come until the old has been pushed out.

If you want to make the analogy closer, think of the hose being capped at the end, with the rubber deteriorating, and an ever-increasing amount of pressure coming from the faucet. At some point, the pressure of the water will cause the hose to split and water to spurt out. Because the pressure behind is high, one might not be enough to relieve it; several small ones might pop, before a big one opens up that finally lets more water out.

In case you can't tell, besides thinking about how volcanoes work, I've been having to deal with an old crappy hose for a long time...

4 points · 2 months ago · edited 2 months ago

Oh my gosh. If that is true then...I’m wondering where all of the liquid rock that’s drained out of Halema’uma’u and Pu’u O’o over the past two weeks is going now. I’m imagining a human excretory system like arrangement, where lower Puna’s been constipated since 1955 and all of the movement in the upper part of the system is finally pushing it out. Ha.

Yup, that's the big question...though as far as the constipation part, I think it's more that it only gets pushed out as long as there's pressure behind it. When that pressure stops, whatever is left just stays in place, until more pressure comes along again. The eruptions since then have been uprift at Mauna Ulu and Puu Oo, so there's been nothing to push it out.

If it stays there after the volcano becomes functionally extinct, you can get rejuvenated eruptions like those that created Diamond Head and Punchbowl on Oahu. Which could potentially still happen...

That's because of trash reporting. HNN has a "16 active fissures in Puna!" headline now. WTF.

One of the news stations in Dallas this morning said that there are now 18 fissures actively producing lava right now. Ugh! I'm about to tweet the girl who said it lol

There’s that, but there’s also the fact that we all share those videos of lava fountains, but no one shares video of pahoehoe just sitting there doing nothing but being pahoehoe.

How close are you allowed to get to the lava flows? Within drone range? (1 mile?)

Hawaiʻi (Big Island)
16 points · 2 months ago

You won't be allowed in. The State and County along with the National Guard have created a passport system that you must show at checkpoints to enter the area. Only residents that can prove residency in the affected areas can obtain this pass,

If you are caught trespassing without that pass. They will arrest you and the fine is $10k per person with possible prison time.

Do not even think of going in. Residents already caught a looter, and he is going to face 20 years. No one is in the mood right now for tourists to gawk at the site. Drones are banned, and so are helicopter tours over the area, and even Volcano Halemaumau crater is now due to its possible eruption. VNP is closed to the public as it has a potential to explode and sourate the area with rocks and ash all the way to possibly Hilo.

I recommend you make other plans than your intent.

There is a flight restricted area with a 5 NM radius around Leilani Estates (19°28'00.0"N 154°54'00.0"W) that includes drone flights. Don't even try.

http://tfr.faa.gov/save_pages/detail_8_0518.html

This. More importantly, drones (that haven't been cleared for usage) in the area of active flows risk interfering with HVO helicopter overflights that are critical to monitoring fissure activity. Please don't get in their way!

Hawaiʻi (Big Island)
2 points · 2 months ago · edited 2 months ago

Crack in Kapoho rd by the horse farms - May 12 11am (rd still open as of right now according to civil defense), and 16th fissure confirmed east of PGV.

2 points · 2 months ago

Here is a map with a circle at 12 miles from the volcano. Officials warn a steam explosion could cause an ash plume affecting areas within 12 miles.

Map link:
https://mappingsupport.com/p/gmap4.php?z=10&t=h&markers=||title=<b>Kilauea<br/>12%20mile%20radius</b>||circle=on||19.405421,-155.281042^19312

Hawaiʻi (Big Island)
3 points · 2 months ago

This does not take into account the trade winds and historical debris mapping provided by USGS. Areas to the SW are at a much higher risk for debris, ash and smoke because of prevailing trade winds.

Oʻahu
3 points · 2 months ago

That doesn't take into account the wind speed or direction or the height of the ash plume. in 1924 the ash went past North Hilo for instance.

Hawaiʻi (Big Island)
3 points · 2 months ago

I believe that was not connected to the wind direction. IIRC from the presentation given at the visitor center a few days ago the plume back then went so high that it got into the jet stream. A quick online search suggests its direction is west -> east, which explains how the ash got to Hilo

Oʻahu
1 point · 2 months ago · edited 2 months ago

That's correct. That's wind direction. At the time the surface winds were probably more e->w. As the ash rose to 20k ft, it was w->e. My point being you can't just draw a clean circle around the crater and say "here's where the ash is going to fall".

edit: word

Comment deleted2 months ago
Oʻahu
1 point · 2 months ago · edited 2 months ago

One more 1924 map from USGS

These are not from 1924. Also in the pic you've posted, it states that the ash depicted is at least 6 inches* thick. Ash wasn't restricted to this area.

The series of eruptions that produced the Keanakako'i Ash (top photo above being examined by a U.S. Geological Survey scientist) devastated an area of at least 75 square mile s (190 km 2). In about 1790, one of these eruptions struck a large party of Hawaiian warriors, killing at least 80 people in the deadliest historical eruption to occur in what is now the United States. Smaller photo above (courtesy National Park Service) shows one of hundreds of footprints, possibly made by the warriors, preserved in the Keanakako'i Ash.

At least two explosive eruptions between 2,700 and 2,000 years ago produced the Uwekahuna Ash, devastating an area almost two-thirds as large as the 230-square-mile (590-km 2) "blast zone" of the May 18, 1980, eruption of Mount St. Helens, Washington. Even older ash deposits are visible along the Hilina Pali fault scarp.

ETA: http://www.volcanolive.com/keanakakoi2.html

Keanakako'i Ash was deposited between 1500 and 1790. The ash was deposited during explosive eruptions of Kilauea. Some deposits were caused by pyroclastic surges.

Hawaiʻi (Big Island)
0 points · 2 months ago

Here is a link to a [map created by USGS showing the extent of the 1924 debris zone] (http://www.westhawaiitoday.com/wp-content/uploads/2018/05/web1_VW-2018-05-11_1924-explosion-dep_USGS.jpg)

Oʻahu
2 points · 2 months ago · edited 2 months ago

Here is a link to a map created by USGS showing the extent of the 1924 debris zone

Right, that's the ballistics and tephra. We're talking ash. You attended the VNO meeting right? They clearly stated that during the 1924 Kilauea eruption, the ash cloud rose to 20k ft, got into the jet stream and as a result ash fell north of Hilo.

ETA:

Part of the caption under that diagram reads:
Ballistics (blocks of rock) greater than 10 inches in size, with some weighing up to several tons, landed in the shaded pink area. Marble- to pea-sized rocks (about .2–10 inches in size) landed in the yellow shaded area. The surrounding light-colored area was subjected to gritty to fine ashfall, with fallout locations influenced by wind direction at the time of the explosions. USGS map.

Hawaiʻi (Big Island)
1 point · 2 months ago

have an upvote for pointing out a fact.

Hawaiʻi (Big Island)
1 point · 2 months ago

Sorry again Machai. I hate to see people get hung up on semantics since we are trying to identify areas that are the greatest risk. Let be clear:

We have a map showing Keanakako'i Ash around the SW of the crater.

We have a map Uwekahuna showing Ash around the SW of the crater.

We have a map showing 1924 ballistics and tephra around the SW of the crater. (Please take note that this is not ash as per /u/macahi )

Hawaiʻi (Big Island)
1 point · 2 months ago · edited 2 months ago

If you take a look at the second map you will see they have broken it down into Uwekahuna Ash and Keanakako'i ash. I prefer to use the terminology used by USGS Hawaiian volcano observatory. My apologies to /u/macahi who takes exception to me calling this ash

Check here for an official report from USGS

Oʻahu
1 point · 2 months ago

Right, and those are not from 1924

Comment deleted2 months ago
Oʻahu
1 point · 2 months ago

God you're a bitch.

you agree that this is then ash?

To what are you referring? What is this?

Tephra is not ash.

Uwekahuna Ash and Keanakako'i ash are ashfalls. I never said they weren't. I said it wasn't from 1924 as you claimed.

Hawaiʻi (Big Island)
-1 points · 2 months ago

Regardless of what year, you can see that there is a historical record of areas that have been heavily impacted by volcanic ash. (or if your really fussy ash & tephra & ballistics). Regardless of the semantics, the area most impacted is consistent on the maps throughout history and provides a more accurate representation of the areas that are at risk.

"Heavily impacted", in terms of getting six inches or more of ash, is not the level at issue here. It only takes 2 mm of ash to completely fuck up your water catchment system, and everyone within 20 miles of Halemaumau is on catchment.

Oʻahu
2 points · 2 months ago

LOL - amazing that some people simply can't say, oh, I was wrong, let me correct or own up to that.

-pau

Hawaiʻi (Big Island)
3 points · 2 months ago

In that case we are on the same page, no matter how much I do like clean circles!

Hawaiʻi (Big Island)
0 points · 2 months ago

Yes, the big circles are nice and circular but don't accurately represent what the extent of a localized ash plume.

Here is a near real-time map showing global wind/jet stream directions. I have seen this type of data leveraged for plume modelling before but I am far from an expert.

Oʻahu
7 points · 2 months ago

Paging u/justsomeisotopist and other scientists and those more knowledgeable than me.

USGS website shows a small cluster of dozen recent, low level earthquakes today in a region NW of Mauna Loa summit area: https://volcanoes.usgs.gov/volcanoes/mauna_loa/monitoring_summary.html

This appears to be much new/more frequent than before.

Potentially related to the ground/magma changes at Kilauea? Any concern for Mauna Loa?

The number of earthquakes at Mauna Loa has been slowly increasing over the past several years as it's been inflating. Eventually there will be an eruption, but this is probably not a signal of much of anything for the near future.

Hah, yeah, I saw that this morning after getting into work. Don't take my word as gospel on this (or as a prediction - I know that's so repetitive right now, but have to say it), but I'm not too concerned at this time. It looks like it was transient activity as of my writing this post. Time could prove me right or wrong on that. We're watching though, and of course that assessment could change. But for now, that little cluster might just be part of what's typical for Mauna Loa right now (which has been at Advisory status for a while). I'm not totally sure though, since I don't have a great sense of Mauna Loa seismicity in past months other than that it's been elevated a little above background for a while. If you look at the last month of seismicity (probably slow for you to load too), there are some little clusters of EQs that show up.

Not sure I can answer your other question about whether it's related to Kilauea. Depends on if/how the two systems are communicating with each other right now. Hopefully we'll know more later.

Just checked for any recent updates on Mauna Loa from HVO, and I'm not finding any at the moment. Will check again later.

I am an armchair geologist. But from Wikipedia, activity in Kiluea has been known to signal activity on Mauna Loa but not always.

Hawaiʻi (Big Island)
7 points · 2 months ago

[New seismic activity in Puna suggests magma is once again on the move] (http://www.staradvertiser.com/2018/05/10/breaking-news/new-seismic-activity-in-puna-suggests-magma-is-once-again-on-the-move/). Earthquake clusters are moving in a northeast direction under Puu Kii. This is where most of the fissures from the 1955 eruption started.

Feel free to view earthquake and lava locations on the [Pele 2018 Map] (https://www.google.com/maps/d/viewer?mid=11tCiLa42FId7GMtg-4UkEoAI9QozTVFD&usp=sharing)

Oʻahu
4 points · 2 months ago

Yeah, looking at the USGS website on eathquakes, cluster of them today has moved east. I was thinking of this when the eruption paused and wondered if magma is onthe move.

Looks like potential for more fissure/eruptions in this area....that's a great google map though

https://volcanoes.usgs.gov/volcanoes/kilauea/monitoring_kilauea.html

Also if you look at Mauna Loa region, there is another small cluster of recent earthquakes in that area as well....

Hawaiʻi (Big Island)
3 points · 2 months ago

Had some earthquakes yesterday (May 9) along the eastern side of the fissures out toward Kapoho (concerning for those in that area).

Oʻahu
14 points · 2 months ago

Dropping lava level concerns scientists (may 9, 2018) USGS announcement https://youtu.be/UuGwSUuWS-4

https://www.facebook.com/hawaiivolcanoesnps/posts/2011659942194665

HVNP closing on Friday due to the risk of explosive summit activity. Not updated on the parks website yet, but this is from their official FB page.

Hawaiʻi (Big Island)
5 points · 2 months ago

It's honestly about time they closed. With the uncertainty and unpredictability, the last thing the county/state needs is more displacement.

Oʻahu
3 points · 2 months ago

To add to this since their post isn't clear. At the HVO meeting which just concluded, they specified that the park will be closed as of 10:00 PM Thurs. 5/10, until further notice. It will not be open on Friday, (except for the Kahuku unit as stated in the announcement)

Oʻahu
2 points · 2 months ago · edited 2 months ago

Thanks for that catch, definitely important. I'll be catching a rebroadcast of that meeting later tonight.

EDIT: Link for those interested. http://naleo.tv/vod/

Look for "Kilauea Volcano: East Rift Zone Meeting, May 9, 2018"

Kauaʻi
2 points · 2 months ago

Getting closer and closer to the geothermal plant huh?...

Looks like the road cracks on 130 might go hot:

https://twitter.com/MilekaLincoln/status/994417192010575873

Oʻahu
4 points · 2 months ago

Question: Do we have any scientifically feasible/practical ways to monitor magma flow under ground and thus potentially predict where a fissure/surface lava eruption may occur?

Oʻahu
12 points · 2 months ago · edited 2 months ago

There are a few ways, but the methods that gives us some of the best real-time data are 1) earthquake propagation and 2) interferograms.

The EQs here told us how the magma moved downrift as it broke through bedrock. You can tell that the magma body stalled more or less under Leilani Estates.

The interferograms are a little harder to interpret, but really cool. They're made by combining two satellite images together. The color bands show up where there's a difference between the two images, and thus is useful for tracking deformation patterns. Each band of color represents some known amount of deformation. Many repeating bands of color spaced closely together, like what you see along the rift and in the latest images, at the summit, means lots of deformation happened in the time that passed between the two images. The order the colors occur in tell you whether it's positive (inflation) or negative (deflation) deformation.

We're also tracking magma movement and other events on the volcano with precise tiltmeter and GPS data. There aren't many of these deployed, however, so the resolution along the rift isn't high. Another method is to use absolutely minute changes in gravity to measure changes in the rift.

Despite this, it's very hard, if not impossible, to make precise predictions. We can make general predictions about where activity might be based on these data, but that's not even a totally sure thing. HVO knew that an eruption was a possibility for several weeks now, but the rapid evolution of conditions and events means that they didn't know exactly what to expect, or where or when. Neither did anyone else. We do hope the take away a LOT more knowledge from analyses of this eruption, once the civil/residential aspects are taken care of. Crisis management comes before science, but if science can happen without interfering, it does happen.

Oʻahu
1 point · 2 months ago

AWesome, thanks for all that insight!

You're welcome! I might be a grumpyass geochemist sometimes, but it's been great answer your and everyone's science questions (to the best of my ability, anyway). Keep 'em coming!

afaik you can use the same ground penetrating sonar/radar thingmajigs they use to locate oil, but those are big and take time to move, and are very expensive

Oʻahu
1 point · 2 months ago

Ah so it is theoretically feasible but realistically/practically impossible. Guess the advanced tech is just not here yet to be able to detect such underground magma without it being hugely expensive/cumbersome...

Hawaiʻi (Big Island)
10 points · 2 months ago

[Pele Map] (https://drive.google.com/open?id=11tCiLa42FId7GMtg-4UkEoAI9QozTVFD&usp=sharing) updated with fissure 15, and flow trajectories (Steepest Paths)

Oʻahu
3 points · 2 months ago · edited 2 months ago

Great map.

Looks like fissure 15 and those around it have the best chance of potentially entering that southern slope region and potentially flow toward/into(?) ocean if everything lines up right. But with the potential cracks on the other side of this fissure line on 130....looks like kalapana area could be cut off for good if lava flows in both directions....

Looks like it may just stay in the area and flow N/NE....

Hawaiʻi (Big Island)
5 points · 2 months ago

I found a map showing chronological fissure eruptions from the 1955 flow. Right now it's following a similar pattern and moving towards the N/NE.

Bad news is that the Kehena flow erupted after fissures advanced to the NE. So when the lava hits a barrier and moves back to the crater there is a risk for the Puna coast :/

Here's the map: https://twitter.com/brianpeolson/status/993590357219622913/photo/1

Hawaiʻi (Big Island)
2 points · 2 months ago

The first fissure of the 1955 flow is almost at the exact same location as the latest fissure that erupted.

Oʻahu
2 points · 2 months ago

newer? drone footage here

Hawaiʻi (Big Island)
5 points · 2 months ago

Here is the correct link: drone footage

This doesn't look very new, though. Maybe from a few days ago. They haven't cited a source, and their statement about "35 homes" being destroyed is wrong. 36 structures have been destroyed, 27 of which are homes.

Oʻahu
3 points · 2 months ago

Ya it's from a couple of days ago. I remember that "Appalling" headline. It reminded me how appalling the writers are at KITV.

runtime error

2 points · 2 months ago

Link doesn't work

Hawaiʻi (Big Island)
3 points · 2 months ago

HVO Overlook Thermal camera hasn't updated in over two hours now.

Oʻahu
2 points · 2 months ago

https://volcanoes.usgs.gov/volcanoes/kilauea/multimedia_chronology.html

Looks like the last updated timestamp on the webcam is right about the time they had an explosion up there. Note top picture for today.

That must be it. The camera next to it also had its last update at about the same time as the thermal one.

Interesting that the camera next to it went out at about the same time. Something must have happened to their data link.

Hawaiʻi (Big Island)
1 point · 2 months ago

I mean, there isn't much left to look at lol. The lava itself is practically out of sight from the camera's view.

Oʻahu
Original Poster1 point · 2 months ago
Hawaiʻi (Big Island)
1 point · 2 months ago

Yeah, the Pu'u O'o Crater single frame broke about a week ago and has been showing that same image ever since.

The latest USGS update says that there's a potential for explosive eruptions if the lava column drops to groundwater level: https://volcanoes.usgs.gov/volcanoes/kilauea/status.html

Because there's no more weight on the water to keep superheated water as a liquid?

Oʻahu
6 points · 2 months ago

Yeah this was my concern when it started to really drop quite low. We'll see if it gets below the water table for a steam explosion....scary but exciting at the same time.

For context on just how much power steam can generate: https://en.m.wikipedia.org/wiki/Mono–Inyo_Craters

How are things in Volcano Village? I'm assuming okay, since I haven't heard anything.

Hawaiʻi (Big Island)
1 point · 2 months ago

We'll see how activity at Halema'uma'u goes...

Thank you!

It's the first time I heard about acid rain since high school. I saw some news on CNN about Hawaii needing to worry about acid rain. Is this actually a big issue or is it a safety precaution? I hope everyone is doing ok there. I hope it doesn't affect/contaminate the water.

Oʻahu
Original Poster1 point · 2 months ago

It's likely not a huge issue at this time. I haven't seen any reports.

Hawaiʻi (Big Island)
3 points · 2 months ago

Also worth noting concern for those on catchment

Hawaiʻi (Big Island)
1 point · 2 months ago

My first assumption would be that acid rain is a larger threat over contaminated land. Since the majority of the moisture falling as rain here is evaporated seawater, I would expect it's not an issue.

Oʻahu
3 points · 2 months ago

No, I think they're referring to rain pulling the 'vog' out of the air and affecting the ground. I think you're thinking of the older/classic definition which was basically the same thing, but caused by industrial pollutants.

Hawaiʻi (Big Island)
3 points · 2 months ago

I forgot to mention this last night when Lanipuna gardens got the evacuation notice, but when the lava crossed Pohoiki Rd I also got an email from the Kapoho neighborhood saying that water service to that area has been cut off. It was cut off a couple days ago by the activity but with water use for health and safety permitted (to preserve what was left in the tank), pipes restored a day or so ago and is now cut off again with this newest fissure activity.

Well, the thread is at 666 comments. It’s time. :-)

2 points · 2 months ago

Are there any good Twitter accounts that sum up what's going on in Big Island?

@USGSvolcanoes gives regular updates.

I'm following @GeogolfHawaii, among others.

Hawaiʻi (Big Island)
2 points · 2 months ago

Iʻve been following civildefenseHI.

3 points · 2 months ago · edited 2 months ago

Large explosion at the Black Sands beach Subdivision? https://www.facebook.com/ikaika.marzo/videos/1796100850442443/ (unconfirmed rumor, so far)

Lots of people talking about it online. No idea what it could've been. Shallow earthquake? I dunno. There was a small earthquake at the summit caldera around the time people say they heard this.

He just posted another video about an hour ago with a resident from Black Sands who said he heard an explosion.

How serious is the vog going to be on Oahu after the trade winds subside? Is it something to be worried about?

Oʻahu
3 points · 2 months ago

There's a Facebook group called "Vog Talk" that you can request to join if you want more in-depth discussion with experts and people who are sensitive to vog.

The vog that comes to us on Oahu won't be toxic or be any different really than other day when the vog is heavy.

News reports are saying to expect a little vog starting Thursday night-ish. Officemate and I are not looking forward to that. He drags pretty hard on voggy days, and and I either drag or get a mild migraine.

You might feel pretty sluggish in the morning, or have a headache or mild respiratory effects. It's not going to be anywhere near like what they're dealing with right on the rift zone, but it may be noticeable.

Oʻahu
6 points · 2 months ago

Not sure why the downvotes. It's a legitimate question, but the answer is 'don't know'. Are you sensitive to it? If so, what do you do to reduce the affect? I can get a sinus headache, sometime a bit of a sore throat, but not much more. If you're overly sensitive, stay inside more, take ibuprofin or whatever works for you.

Hawaii News Now reporting that lava from 13 has crossed both Kahukai and Pohoiki Rds, and that HVO is conducting a walkthrough of the geothermal plant grounds to check for any possible activity there. They do say the hazardous material onsite has been relocated to locations believed to be safe.

Hawaiʻi (Big Island)
6 points · 2 months ago

Here is an updated map with fissures 13 & 14. Strong thermal properties near PGV/Pohoiki Road: [Pele 2018 Map] (https://drive.google.com/open?id=11tCiLa42FId7GMtg-4UkEoAI9QozTVFD&usp=sharing)

Lava flow pretty much lines up with path of steep descent.

Comment deleted2 months ago
Hawaiʻi (Big Island)
2 points · 2 months ago

The back entrance by Pohoiki road has been crossed by lava now

Hawaiʻi (Big Island)
2 points · 2 months ago

Residents of Lanipuna Gardens were told to evacuate toward Pohoiki Bay/Isaac Hale Beach Park. The Kapoho Rd still seems to be open (I think) so people can go around and back up to Pahoa.

Comment deleted2 months ago
Hawaiʻi (Big Island)
3 points · 2 months ago

Hinalo st area = Lanipuna Gardens, Leilani estates centers around Leilani avenue

Hawaiʻi (Big Island)
2 points · 2 months ago

Lanipuna Gardens is the area on Pohoiki Rd just below Leilani Estates

Comment deleted2 months ago
Oʻahu
9 points · 2 months ago · edited 2 months ago

Being reported here

We just got word that some radio stations reporting to exit Leilani through the bottom exit which has just had Lava flew over the road do not head out through the bottom if you’re exiting Leilani go through the top.

This person had a live feed of that road getting covered and becoming undriveable.

The loop of that is here: https://www.facebook.com/lavanews/videos/201100557346916/

That video is fucking insane

That video is from 13-631 Leilani Ave where the lava crosses Leilani and into the driveway of that house there. It is getting close to going over Pohoiki Rd just east of Leilani Ave if it doesn't stop soonish.

Hawaiʻi (Big Island)
1 point · 2 months ago

Sorry! I hadn't heard!

5 points · 2 months ago

The Google + GIS map I posted now shows 14 fissures. There is also a ‘power out’ GIS overlay layer you can turn on.

The map was DOA for a bit today but is working fine now. But note that it is slow to open due to load on the Hawaii County GIS server.

If you have not seen this map before and would like to know how to get the most benefit from it, please click “Map tips” in the upper left corner.

Map link:
https://mappingsupport.com/p/gmap4.php?ll=19.460014,-154.906200&z=14&t=t6,Mandatory_evacuation,Roadblock,Lava_flow_as_of_5_7_2018,Fissure&q=https://mappingsupport.com/p/disaster/2018/hawaii/hawaii_volcano_eruption.txt

Oʻahu
Moderator of r/Hawaii, speaking officiallyOriginal Poster5 points · 2 months ago

Emergency Update from Hawaii Civil Defense

http://www.hawaiicounty.gov/active-alerts/east-rift-zone-eruption-emergency-update.html

EVACUATION - Hawaiian Volcano Observatory confirms 2 new vents. All Lanipuna residents must evacuate now. Evacuate towards the ocean Isaac Hale Beach Park. Vent number 13 has opened near the intersection of Leilani Avenue and Kahukai Road and Vent number 14 near Kaupili St. and Leilani Avenue. Both are actively erupting.

Oʻahu
7 points · 2 months ago

Hawaii News Now just updated to say fissures are spewing lava again:

"PUNA, BIG ISLAND (HawaiiNewsNow) - After a brief pause in volcanic activity, two new eruptions are spewing lava in Leilani Estates and at least one more home has been destroyed, bringing the number of homes claimed by lava since Thursday afternoon to 27."

Oʻahu
5 points · 2 months ago · edited 2 months ago

Live feed:

https://www.facebook.com/lavanews/videos/201100557346916/

Edit: better link

Wow, live power lines, melting and falling into the lava...

ETA: This is a loop now. He went off a while ago and it's repeating.

Hawaiʻi (Big Island)
2 points · 2 months ago

Fissure 13 at Kahukai and Leilani ave, fissure 14 at Kaupili both now erupting, and Mohala st has huge cracks

Hawaiʻi (Big Island)
3 points · 2 months ago

Hawaii's Kīlauea Volcano Eruption Spotted from Space (Photos)

https://www.space.com/40527-hawaii-kilauea-volcano-eruption-satellite-images.html

[deleted]
-4 points · 2 months ago

[removed]

[deleted]
3 points · 2 months ago

[removed]

Hey guys, I've been watching the HVO webcam of the Halemaʻumaʻu Overlook Vent Thermal...Earlier it was a little pool of lava wayyy down. In the past half hour it's started turning into a screen of red and orange. Is everything okay? Is it just hot gasses coming up?

https://hvo.wr.usgs.gov/cams/panorama.php?cam=HTcam

The camera view occasionally gets obscured - it's from rockfalls, which throw up some ash and steam, sometimes small explosions. They're fairly common. At the Jaggar Overlook, you can hear little rumbles from the lava lake as rocks fall in. It's kinda creepy and awesome all at once. With the deflation/lava lake drain at the summit, it's been looking like there are larger rockfalls more often. Some are in response to the increased earthquake activity in the volcano.

Also, the scale adjusts as the crater gets colder...keep an eye at the value at the top of the scale.

Yep, that's to best bring out detail in the image. I'm used to that colorbar representing much higher temperatures with the lake much closer to the camera, haha.

Right now I see no lava, so I guess it's just residual heat and hot gases.

Yeah it's back to normal. I snagged a couple screenshots to show what I was looking at, though.

https://imgur.com/a/xHNrWUS

Look at the SCALE. It's cold...

oh shit. I'm an idiot. I didn't expect the scale to change!

Second one is what I saw. Looks like the camera went wacky for a bit.

Hawaiʻi (Big Island)
6 points · 2 months ago

For anyone interested in the current state of flows and fissures this is a good link (seems to be updated daily): https://volcanoes.usgs.gov/volcanoes/kilauea/multimedia_maps.html

Example Content:

https://i.imgur.com/3ZQWmAu.jpg

Wow, I hope everyone is staying safe. I am in New York and we aren’t really hearing much about it over here.

I do have some questions though.

How do you clean up after a lava flow that covers a house or a road? I assume you can’t plow it away like you would with mud or snow. Once it’s cool it’s solid rock, right ?

Do people have volcano insurance like Florida has sinkhole insurance?

Oʻahu
Original Poster8 points · 2 months ago

Clean up - you don't. It is permanent new land.

Lava insurance is a thing, but is prohibitively expensive, so many folks who live in those areas don't bother.

Wow, so lava eats the road you just pave around it? Man...the cost of living in paradise.

Oʻahu
2 points · 2 months ago

There are roads that go through old lava fields but I expect it's not an easy process. Depending on the flow it might indeed be easier to just go around.

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