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Lava outbreak on Hawaii island

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Lava outbreak on Hawaii island

Old 9th May 2018, 08:18
  #41 (permalink)  
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Jolihokistix - just to illustrate what I was trying to say, the following is an overhead video of fissure no. 13 taken earlier today by the USGS. As you can see, building ditches won't help with this sort of activity.

https://volcanoes.usgs.gov/vsc/movies/movie_173942.html
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Old 9th May 2018, 11:23
  #42 (permalink)  
 
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Hokulea, I am surprised that the lava hasn't set the bush alight and created forest fires, or is that just not visible in the video?
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Old 9th May 2018, 11:31
  #43 (permalink)  
 
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Is Waimea unaffected by the troubled area on Big Island. I have a friend there who's gone incommunicado.
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Old 9th May 2018, 12:23
  #44 (permalink)  
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seafury - we've had a lot of rain recently, so suspect that's helping keeping vegetation from catching fire and spreading. If this had happened a few months ago when we were in a severe drought I think things would be very different.

sidevalve - Waimea is a very long way from the eruption site, I wouldn't be too concerned.
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Old 9th May 2018, 13:18
  #45 (permalink)  
 
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Incredible footage, Hokulea. Many thanks!
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Old 9th May 2018, 15:19
  #46 (permalink)  
 
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Hokulea,

Thanks for all your updates and the links. I’m a geologist, so I particularly liked the link to the 1924 eruption, which gives me a much better idea of what’s happening now.

You’re a star.
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Old 9th May 2018, 17:04
  #47 (permalink)  
 
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Hokulea,

To you and everyone out there, stay safe. Unlike India Four Two, I trained as a geologist/geomorphologist, but ended up doing ATC. Still love all this stuff though.
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Old 10th May 2018, 06:42
  #48 (permalink)  
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Thanks, everyone, really appreciate that there are geologists on the thread, I may have some questions later! I've always loved geology and physical geography myself, but as India Four Two figured out, I went into a different scientific field...

Anyway, today's update: A new fissure and lava outbreak occurred today at the eastern end of current activity but that has now paused. Yesterday, residents near the coast south of the eruption reported shaking and loud "booming" noises coming from the ground - confirmed by USGS staff. That must have been a bit scary. I don't know what caused the booming noises. Finally, a rock fall at Kilauea's summit caused an explosion within the crater and lots of smoke and ash although it was short-lived.

USGS is now warning us of the very real possibility of explosive eruptions at Kilauea's crater. Within a week, the lava lake there has dropped from the surface down to 1000 feet below and continues to drop. If and when it reaches the water table (depth of ~1600 feet) then large explosive eruptions might occur (phreatic eruptions for the geologists). Given how quickly the lake has dropped, this might start happening in a few days.

Now for an interlude!

Amazing video of the lava lake taken a couple of days ago (it has now dropped out of sight of the cameras): https://volcanoes.usgs.gov/vsc/movies/movie_173941.html

Pictures courtesy of the USGS: 1) eruption of dust and ash after a rock fall at the summit this morning, 2) the lava lake near the surface on April 30th, 3) thermal infrared image looking down into the crater at the summit after the lava lake disappeared.
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Old 10th May 2018, 07:10
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Good overview by USGS of the Kilauea summit eruption:
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Old 10th May 2018, 08:41
  #50 (permalink)  
 
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This is a link to a USGS map of the activity:
https://volcanoes.usgs.gov/volcanoes...edia_maps.html

Itís clear that the fissures are related to the same fault line. The lava flow northeast of fissures 2, 7 and 8 must be due to a local topographic low.

I have an interest in your eponymous star, Hokulea, as one of my hobbies is celestial navigation. My best fix yet is 8 nm in error, but thatís good enough for island finding.
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Old 10th May 2018, 08:55
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A german volcano specialist is writing in his blog, that these events resemble the prelude to the 1924 event at the Kilauea. But of course noone can predict if it unfolds like that, but if, be prepared and safe!

Post is here, you might want to try an online translator Kilauea: 2 weitere Spalten eruptierten | Vulkane Net Newsblog
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Old 10th May 2018, 08:57
  #52 (permalink)  
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8 nm error will certainly get you where you want to be after a trip over the ocean!

Many of us here are using a more local map which actually shows the individual fissures. It gets updated regularly and also shows road closures and the areas under evacuation notices. Please let me know if you have problems with it as they recently changed the URL which caused a bit of confusion here.

https://hawaiicountygis.maps.arcgis....5eb32761793078

PS. PAXfips - yes, the activity is certainly very similar to the 1924 event. It's also similar to the ~1950s event which didn't result in explosive eruptions, so things are certainly still a little uncertain. From my amateur perspective, 1924 is a bit closer to what's happening now.
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Old 10th May 2018, 10:04
  #53 (permalink)  
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Well, earlier I posted about waking up to a lava river, now someone comes home to find this at the bottom of the garden.

Volcano erupts at end of man's garden - BBC News

ETA. I learned the identity of the person who owns that property today. Unfortunately, the house has burned down since the video.

Last edited by Hokulea; 11th May 2018 at 10:07.
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Old 10th May 2018, 10:29
  #54 (permalink)  
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Apologies for repeated posts, but for those interested and have an hour spare, this is a video from a presentation that was given by the USGS to local folk this evening.

VIDEO: Volcano Community Told To Expect Explosions, Ash

Last edited by Hokulea; 11th May 2018 at 10:06.
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Old 11th May 2018, 02:12
  #55 (permalink)  
 
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Good overview by USGS of the Kilauea summit eruption:
https://www.youtube.com/watch?v=gNoJv5Vkumk
Apologies for repeated posts, but for those interested and have an hour spare, this is a video from a presentation that was given by the USGS to local folk this evening.

VIDEO: Volcano Community Told To Expect Explosions, Ash
Excellent videos posted by sidevalve and Hokulea. For anyone interested in the technical details of this event, I thoroughly recommend taking the time to view both of these videos. At 35 minutes and 44 minutes into the second video, there is a discussion about the volume of lava that had been removed from the lava lake versus the volume of lava that has been extruded from the new fissures, which is something that I had wondered about.

PS It's nice to see and hear enthusiastic scientists explaining what's going on, without talking down to their audience. Carl Sagan and Stephen Hawking would have approved.

Last edited by India Four Two; 11th May 2018 at 02:56.
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Old 11th May 2018, 05:26
  #56 (permalink)  
 
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3D Modelling of the lava lake https://volcanoes.usgs.gov/observato...aFile-1989.mp4
Level is now around -300m, at -400 the groundwater/explosive eruption scenario likely unfolds.

All the best
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Old 11th May 2018, 06:05
  #57 (permalink)  
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Yep, the Volcanoes National Park will be closing tomorrow for an indefinite period due to concerns about explosive summit eruptions. If they do occur, I wonder about inter-island airline service to the Big Island. The 1924 eruptions apparently sent ash to around 30,000 feet.

Last edited by Hokulea; 11th May 2018 at 06:21.
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Old 11th May 2018, 06:54
  #58 (permalink)  
 
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Northeast trades at this time of year? Hilo airport should probably be OK.
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Old 11th May 2018, 07:25
  #59 (permalink)  
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Problem is the upper-level winds go the other way. Usual trade winds are north-easterlies, but above 20,000 feet or so (it varies a lot) the winds are south-westerlies. Even though there were trade winds during the 1924 eruptions, ash got dumped on Hilo. Anyway, I started thinking about this as I'm flying off on vacation at the end of the month! However, it could be a big problem as many of our supplies come via air.
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Old 11th May 2018, 10:52
  #60 (permalink)  
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Latest: no further lava outbreaks today but seismicity continues. This is an overflight today of the affected area with commentary from civil defense:


In the meantime, Fox News tells us that residents on Oahu had to be evacuated, which is, of course, complete bullshit.

https://mobile.twitter.com/i/web/sta...96244162916352

PS. The first alleged looter was caught a couple of days ago:

https://local.nixle.com/alert/6559830/?sub_id=344108

Last edited by Hokulea; 11th May 2018 at 11:07.
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