PDA

View Full Version : Lava flow threatens Pahoa, HI



Trebuchet
2014-Oct-29, 02:58 PM
I've been waiting for someone to post about this here and finally realized I should do it myself. A lava flow from Kilauea is threatening the village of Pahoa (http://en.wikipedia.org/wiki/Pahoa,_Hawaii). Unlike most flows it's gone north instead of southeast to the sea. No homes damaged yet, that I know of, but it could be happening soon. If anyone has links to better sources on this I'd appreciate it.
http://www.cnn.com/2014/10/29/us/hawaii-volcano/index.html?hpt=hp_t2

Squink
2014-Oct-29, 05:11 PM
Hawaiian Volcano Observatory Cams (http://hvo.wr.usgs.gov/cams/)
Kilauea Status Reports, Updates (http://hvo.wr.usgs.gov/activity/kilaueastatus.php)
Tuesday:
As of 5:30 PM, the flow was 310 meters (340 yards) in a straight line distance from Pāhoa Village Road and about 900 meters (985 yards) in a straight-line distance from Highway 130.

Gillianren
2014-Oct-29, 05:42 PM
I can ask my friends who are from there--you've actually met one of them. My best friend Gwen, the one who was watching Simon at faire, grew up in Pahoa. She seems to be taking the whole thing as "well, we live on an active volcano," though I suspect she'd let me know if the house her mother still lives in were threatened.

Swift
2014-Oct-30, 02:17 PM
The update as of yesterday afternoon


As of 4:15 pm, the flow was about 185 m (202 yd) in a straight line distance from Pāhoa Village Road and about 775 meters (850 yd) in a straight-line distance from Highway 130.

The lava lobe south of the main flow and upslope of Apa`a Street was not active today, but there were a couple of small breakouts on the north side of the flow that have advanced 70 to 110 m (75 to 120 yd) in the past day.

Squink
2014-Nov-01, 05:32 PM
Daily lava maps (http://hvo.wr.usgs.gov/maps/)
Daily Photos (http://hvo.wr.usgs.gov/multimedia/index.php?newSearch=true&display=custom&volcano=1&resultsPerPage=20)

Gillianren
2014-Nov-03, 05:10 PM
I talked to one of my friends last night. She says it looks like the schools are going to be destroyed, which she says is going to have bad effects on the local kids. They'll be sent to a consolidated school down the road instead. Also, instead of taking forty minutes to drive to Hilo from Pahoa, the new road they're going to build will take something like twice that time.

Trebuchet
2014-Nov-03, 11:08 PM
Not to mention the threat to the garbage transfer station!

Sorry. It's a serious situation, of course, and I hope they come through it ok. In cases of man vs mother nature, man loses most of the time. The flow has mostly been sideways the last couple of days, but that probably won't last.

ETA: If it helps any, from Google maps and the HVO maps linked above, the schools look to be some distance from the "path of steepest descent" where the flow is likely to go. That doesn't help, of course, if you're on the wrong side.

Trebuchet
2014-Nov-06, 03:54 PM
From the HVO maps site referenced above, the tip of the flow has not advanced in the past several days, although it widened out a few days ago. There seems to be a big breakout well "upstream" which may help to take some of the pressure off.

Squink
2014-Nov-11, 01:27 AM
Slow-moving lava hits first house in Hawaii town (http://phys.org/news/2014-11-slow-moving-lava-house-hawaii-town.html)
The molten rock hit the house Monday, and officials are expecting the house to burn down within 30 to 40 minutes. The occupants have already left the residence in Pahoa, the largest town in the Big Island's isolated and mostly agricultural Puna district.

Trebuchet
2014-Nov-11, 02:46 PM
If I'm reading the flow maps and Google maps correctly, the house in question is well away from the main part of town, basically across the street from the transfer station. The tip of the flow nearest town is still stalled.

ETA: This photo (http://hvo.wr.usgs.gov/multimedia/uploads/multimediaFile-969.jpg) shows it, I think.

Trebuchet
2014-Nov-13, 06:25 PM
Here's a photo from yesterday (http://hvo.wr.usgs.gov/multimedia/uploads/multimediaFile-977.jpg) showing the transfer station and the area where the house was destroyed. I had assumed the transfer station may have had a berm around it but the caption here (http://hvo.wr.usgs.gov/multimedia/index.php?newSearch=true&display=custom&volcano=1&resultsPerPage=20) indicates it's an access road that's lower than the station itself and may take a few days to fill up. Note the vehicles and people at the transfer station! The flow tip nearest town is still inactive.

NEOWatcher
2014-Nov-13, 06:44 PM
Here's a photo from yesterday (http://hvo.wr.usgs.gov/multimedia/uploads/multimediaFile-977.jpg) showing the transfer station...
Warning: 16Mb. It might take a while.

Trebuchet
2014-Nov-14, 06:10 PM
Another large pic (http://hvo.wr.usgs.gov/multimedia/uploads/multimediaFile-986.jpg), I'm afraid, but I love it.

Area Closed
Active Lava Flow
Extremely Hazardous

Ya think?

Squink
2014-Nov-14, 06:20 PM
Ya think?That fence is working pretty well.

Swift
2014-Nov-14, 06:47 PM
That fence is working pretty well.
It would work better if they closed the gate. ;)

publiusr
2014-Nov-15, 09:19 PM
Let a neighbor's dog dig out from under that fence.

Squink
2014-Nov-20, 12:40 AM
Let a neighbor's dog dig out from under that fence.
Lava did find a few weak spots (http://hvo.wr.usgs.gov/multimedia/uploads/multimediaFile-998.jpg).

Trebuchet
2014-Nov-20, 01:21 AM
But the dog isn't going to get through!

Not a lot of news the last couple of days. Activity is mostly upslope, it appears, with the flows fronts nearest town inactive. No new maps or pics since the 17th. Pahoa is still a long way from being out of the woods, however. This flow's been active since June 27 and may keep going for a long long time.

From the HVO status report (http://hvo.wr.usgs.gov/activity/kilaueastatus.php), as of today (11/19):

Activity Summary: Kīlauea Volcano continues to erupt at its summit and within its East Rift Zone. The downslope portion of the June 27th lava flow below the crack system, near Kaohe Homesteads and Pahoa, is not active, but breakouts remain active in the upslope portion of the flow between 1.6 km (1 mile) and about 11 km (7 miles) northeast of Puʻu ʻŌʻō. Kīlauea's summit has had deflationary tilt during the past two days, and the level of the summit lava lake at Halemaʻumaʻu Crater fluctuated slightly.


HVO scientists conducted field observations on the lowermost part of the June 27th lava flow yesterday. They found no indication that lava was still moving through the lava-tube system or on the surface between the flow tip near Pahoa Village Road and as far as about 1.2 km (0.75 mi) upslope of Apa`a St./Cemetery Rd. Overflights yesterday by Hawai`i County Civil Defense identified several surface flows on top of and along the margins of the June 27th flow between 1.6 km (1 mile) and about 11 km (7 miles) northeast of Puʻu ʻŌʻō. The lowermost breakout was located in the middle of the crack system on the East Rift Zone, indicating that lava has reoccupied the tube system at least this far from the vent. A USGS overflight is scheduled for later today.

Squink
2014-Nov-25, 03:37 AM
Nov 22. Looks likes the active breakout areas have moved several km back from Pahoa (http://hvo.wr.usgs.gov/multimedia/uploads/600x450/previewImage-1012.jpg).

Trebuchet
2014-Nov-25, 06:02 AM
Nov 22. Looks likes the active breakout areas have moved several km back from Pahoa (http://hvo.wr.usgs.gov/multimedia/uploads/600x450/previewImage-1012.jpg).
Hence the lack of updates recently, although I've been keeping an eye on it. Good news for Pahoa, for the time being, but this flow's been going since June 27 and shows no time of stopping.

Trebuchet
2014-Dec-03, 07:40 PM
The latest map, as of Dec 1, shows a long active finger of lava west of and roughly parallel to the older flow. It's following a "path of steepest decent" leading toward Pahoa Market Place. The text, however, notes that the current path comes very close to another in an area of flat ground and the flow could wind up following either, or both. The other path appears to me to lead north into a pretty heavily populated area. Could be a touchy situation either way.

Swift
2014-Dec-05, 03:43 PM
If Madame Pele gives you lava, make lava-aid.

Laboratory Equipment magazine (http://www.laboratoryequipment.com/news/2014/12/hawaiian-students-go-lava-field-trips?et_cid=4302081&et_rid=54636800&type=headline)


Some students on Hawaii's Big Island are getting a rare, up-close look at the lava that's disrupting where they go to school. Hawaii County Civil Defense Director Darryl Oliveira says starting next week, affected students will go on field trips to parts of the lava flow that has reached the rural town of Pahoa.

He says it's a pilot program that will help officials consider offering lava-viewing opportunities to the public. Access so far has been restricted because of safety concerns.

Lava from Kilauea volcano has forced several schools to close.

Students are being rerouted to other area schools and a temporary site. The state Department of Education built a $9 million temporary site in a parking lot in case lava hits Keonepoko Elementary.

Oliveira says the excursions will include volcano science and a guided walk to where the flow crossed a road.

Trebuchet
2014-Dec-10, 01:57 AM
In the "no news is good news" department, the latest flow-finger continues to be stalled in flat terrain. Depending on supply, of course, it'll eventually have to decide which way (if not both) to go. Neither is particularly good.

Didn't we used to have a poster whose sig line was "Any problem can be solved by appropriate use of high explosives"? I keep wondering if there wouldn't be some way to blast a hole in the east side of Pu'u-o'o (sp?) and let the volume go out that way, where there have already been many massive flows.

And wasn't there a claim of Hilo being saved from a flow from Mauna Loa in the 1930's by bombs from the then Army Air Corps?

CJSF
2014-Dec-10, 04:10 AM
While the people of Pahoa wait anxiously and FOREVER for the lava to do something, residents of Cabo Verde have been dealing with a major catastrophe.

http://earthquake-report.com/2014/12/08/fogo-volcano-activity-report-lava-flow-speed-increases-downhill/

2 towns have been destroyed so far, and as Cabo Verde has very minimal means to deal with the destruction and no catastrophe insurance system, they will need international help to cope with this.

CJSF

Cookie
2014-Dec-10, 06:47 AM
How does this lava flow affect, if at all, any of the astronomical observatories, in that area (if there are any) and the surrounding areas?


If Madame Pele gives you lava, make lava-aid.

Laboratory Equipment magazine (http://www.laboratoryequipment.com/news/2014/12/hawaiian-students-go-lava-field-trips?et_cid=4302081&et_rid=54636800&type=headline)
That's pretty cool... OR IS IT?!? :surprised:

I'm glad some good may come of this. :)

Swift
2014-Dec-10, 02:47 PM
How does this lava flow affect, if at all, any of the astronomical observatories, in that area (if there are any) and the surrounding areas?

Not in the least. Map (http://www.hawaii-guide.com/images/body_images/Map_of_Big_Island_of_Hawaii_Detailed.jpg)

The lava flow is in the Eastern tip of the island (in the area named Puna).

The observatories are close to the summit of Mauna Loa. They are separated by about 40 miles and about 13,000 feet in elevation. Mauna Loa is inactive for all practical purposes.

Trebuchet
2014-Dec-10, 10:29 PM
The observatories are actually on Mauna Kea, not Mauna Loa which has been active in past 30 years or so. At least most of them are, I don't know if there's anything on Mauna Loa.

Swift
2014-Dec-11, 01:03 AM
The observatories are actually on Mauna Kea, not Mauna Loa which has been active in past 30 years or so. At least most of them are, I don't know if there's anything on Mauna Loa.
Sorry, you are absolutely correct. But they are still very far from the lava flow.

Trebuchet
2014-Dec-11, 01:21 AM
Sorry, you are absolutely correct. But they are still very far from the lava flow.

Even farther, in fact!
There are a couple of observatories on Mauna Loa: the Mauna Loa Observatory (http://en.wikipedia.org/wiki/Mauna_Loa_Observatory), and the Mauna Loa Solar Observatory (http://en.wikipedia.org/wiki/Mauna_Loa_Solar_Observatory), which share a site on the north slope.

Trebuchet
2014-Dec-12, 04:14 PM
While the people of Pahoa wait anxiously and FOREVER for the lava to do something, residents of Cabo Verde have been dealing with a major catastrophe.

http://earthquake-report.com/2014/12/08/fogo-volcano-activity-report-lava-flow-speed-increases-downhill/

2 towns have been destroyed so far, and as Cabo Verde has very minimal means to deal with the destruction and no catastrophe insurance system, they will need international help to cope with this.

CJSF

Thanks for posting that. It's pretty darn hard to find information about it. The villages destroyed are actually inside a massive caldera. When you're poor, you've got to live where you can make a living, I guess.

http://en.wikipedia.org/wiki/Pico_do_Fogo

publiusr
2014-Dec-12, 11:38 PM
Maybe erecting some chain link fences isn't such a bad idea.

Trebuchet
2014-Dec-14, 01:28 AM
The active branch of the Jun 27 flow had been somewhat stalled for a few days in a flat area but now seems to have advanced considerably in the past couple of days. It's following the northeasterly path toward Pahoa Market Place, now 1.6 miles away, rather than the more northerly path. Neither, of course, is good.
http://hvo.wr.usgs.gov/maps/uploads/image-207.jpg

Cookie
2014-Dec-14, 02:46 AM
Maybe erecting some chain link fences isn't such a bad idea.
What?

They haven't fenced off any hazardous areas yet?

Not gonna end well...

http://www.seymoronion.com/Annabelle/Chain_Link_Fence_Required.png

Trebuchet
2014-Dec-16, 09:55 PM
The active branch of the flow is now down to about 1.0 mile from Pahoa Market Place.

This map (http://hvo.wr.usgs.gov/maps/uploads/image-208.jpg) is a day old so shows it slightly farther.

KaiYeves
2014-Dec-17, 02:16 AM
I referenced this event in my Earth Science final today.

Trebuchet
2014-Dec-19, 05:06 PM
Now down to about 1.0km/0.6mi from Pahoa Marketplace.

ETA: Another 150 meters since that post.

Edited again: Pahoa actually made the TV news this morning, first time in quite a while. They said at the current rate, the flow is about six days from Pahoa Marketplace.

Squink
2014-Dec-24, 02:08 AM
675 meters today (http://hvo.wr.usgs.gov/maps/uploads/image-215.jpg).

Trebuchet
2014-Dec-24, 03:30 AM
I keep wondering why they don't dig a large ditch, with a berm on the downslope side, to try to steer the flow away from infrastructure. There's been time. Modern machinery can move a LOT of earth very quickly.

Trebuchet
2014-Dec-26, 02:38 PM
The latest "finger" of lava approaching Pahoa Marketplace appears to have stalled.

danscope
2014-Dec-26, 07:29 PM
I keep wondering why they don't dig a large ditch, with a berm on the downslope side, to try to steer the flow away from infrastructure. There's been time. Modern machinery can move a LOT of earth very quickly.

I "Think " that they have some laws in place concerning the alteration and manipulation of lava flows on Hawaii.
But it would have made sense. Hmmm.....

Trebuchet
2014-Dec-29, 01:22 AM
I "Think " that they have some laws in place concerning the alteration and manipulation of lava flows on Hawaii.
But it would have made sense. Hmmm.....

I didn't find anything regarding laws. I did find that previous attempts to divert flows in Hawai'i have not been successful, although better luck has been had in Iceland and Italy.

Meanwhile, the flow tip has resumed a slow advance, some 24 meters since Friday.

Trebuchet
2014-Dec-30, 10:25 PM
Looks like it may be picking up speed. 37m advance since yesterday.

Trebuchet
2014-Dec-31, 04:45 PM
Daily lava maps (http://hvo.wr.usgs.gov/maps/)
Daily Photos (http://hvo.wr.usgs.gov/multimedia/index.php?newSearch=true&display=custom&volcano=1&resultsPerPage=20)

Bumping those links. Lava is on the move, getting close to Pahoa Marketplace. Interesting to see in the photos that when crossing the firebreak road, the lava spread out in both directions along the road. This reinforces my notion that digging a ditch might actually be of some use.

Squink
2014-Dec-31, 06:31 PM
What is Pahoa Marketplace? (http://www.bigislandchronicle.com/tag/pahoa-marketplace/):
Pahoa Marketplace, opened in 2004, was the first shopping center built at the crossroads where the Pahoa Bypass diverges from the former highway that runs through downtown Pahoa,. The center houses Malama Market, the area’s largest supermarket; Lex Brody Tires, and a number of boutique shops. Across the street, a newer shopping center houses Long’s Drugs and other businesses. Since the two centers were built, a smaller downtown grocery and all of pharmacies in downtown Pahoa have closed.

Trebuchet
2015-Jan-01, 06:32 PM
What is Pahoa Marketplace? (http://www.bigislandchronicle.com/tag/pahoa-marketplace/):

Pahoa Marketplace, opened in 2004, was the first shopping center built at the crossroads where the Pahoa Bypass diverges from the former highway that runs through downtown Pahoa,. The center houses Malama Market, the area’s largest supermarket; Lex Brody Tires, and a number of boutique shops. Across the street, a newer shopping center houses Long’s Drugs and other businesses. Since the two centers were built, a smaller downtown grocery and all of pharmacies in downtown Pahoa have closed.

At least it's not a Wal-Mart. Or, considering the current situation, maybe I should be wishing it WAS a Wal-Mart.

Trebuchet
2015-Jan-07, 03:42 PM
Some new information up after a bit of a dry spell. From the Kilauea status report:

USGS Hawaiian Volcano Observatory (HVO) scientists conducted a helicopter overflight of the June 27th lava flow this afternoon and mapped its perimeter. At the time of the flight, surface breakouts along the distal part of the flow were scattered between 1 and 3.5 km (0.6 and 2.2 mi) upslope from the Pahoa Marketplace and posed no immediate threat. Amongst this activity, a narrow flow lobe (about 2.5 km (1.6 mi) upslope from Pahoa Marketplace) was advancing toward the north-northeast. This lobe has entered a drainage that leads to the steepest-descent path that crosses Highway 130 about 1 km (0.6 mi) south of the Makuʻu Farmer's Market, but the flow is still 3.5 km (2.2 mi) uplsope from that point and moving slowly. Small breakouts were also active in an area of persistent activity about 7 km (4 mi) upslope from Pāhoa.
Also new maps and photos available.

Trebuchet
2015-Jan-15, 04:12 PM
Pahoa Marketplace continues to "dodge the bullet".

June 27th Lava Flow Observations: The flow that advanced toward Pahoa Marketplace in past weeks remained stalled approximately 800 m (0.5 miles or 880 yards) from the intersection of Highway 130 and Pāhoa Village Road, however, surface breakouts were scattered between 0.5 and 1 km (0.3 and 0.6 mi) upslope of the stalled flow tip during an HVO overflight yesterday morning. A narrow lobe was advancing north-northeast about 700 m (765 yd) upslope of the stalled tip. This new lobe has advanced about 240 m (260 yd) since January 9. (From the HVO Status Reports (http://hvo.wr.usgs.gov/activity/kilaueastatus.php))

It could be a short-term reprieve, of course. The June 27 flow has been active for six months now and shows no sign of stopping. The advancing lobe, fortunately, doesn't appear to be heading toward populous areas at the moment.

Trebuchet
2015-Jan-19, 04:26 PM
Some activity:

une 27th Lava Flow Observations: According to this morning's report from Hawai`i County Civil Defense, the tip of the June 27th lava flow advanced about 65 m (70 yd) since yesterday, and is about 650 m (0.4 mi) from the highway, in the vicinity of the fire and police stations

The northern flow lobe that broke out from the main flow about 1.5 miles upslope of the tip was also active along its margins and in its interior, but was moving sluggishly during HVO's mapping on Friday. It is in a drainage area leading to the steepest-descent path that crosses Highway 130 about 1 km (0.6 mi) south of the Makuʻu Farmer's Market.

The police and fire station is about 450 m north of, and across the road from, Pahoa Marketplace.

Trebuchet
2015-Jan-21, 05:07 PM
Updated map (http://hvo.wr.usgs.gov/maps/uploads/image-230.jpg) showing the advance toward the fire/police stations.

Trebuchet
2015-Jan-30, 03:53 PM
The flow is mostly spreading rather than advancing for the past week or so. Status reports show it 500m from Highway 130. Note, however, that there are homes on the side of the highway closer to the flow. Pretty worrying.

Some really good recent photos (http://hvo.wr.usgs.gov/multimedia/index.php?newSearch=true&display=custom&volcano=1&resultsPerPage=20) at the HVO site.

Trebuchet
2015-Feb-08, 03:46 PM
No advance toward the road in the past week but lots of breakouts/widening around the edges. There's also a breakout nearer PuuOo that may (my guess) be siphoning off some lava. Some good new pictures at the link above.

Trebuchet
2015-Feb-20, 04:12 PM
Still stalled at the flow tip(s), but there are breakouts at the side. Some good new photos and maps at the HVO site (http://hvo.wr.usgs.gov/activity/kilaueastatus.php).

Trebuchet
2015-Feb-25, 04:52 PM
The breakout on the north side has grown considerably. Fortunately it seems headed in a relatively benign direction. More details at the HVO site, link above.

Trebuchet
2015-Mar-08, 04:36 PM
No news is good news.

In the down slope areas, to include the flow front, the lava flow continues with scattered surface breakouts, within the flow margins, and minor expansion of the flow field. Overall the flow has not moved closer to Hwy 130 in over a week. The breakout on the south side of the flow front lobe, about 870 m (0.5 mi) from Malama Market, is no longer advancing toward the Market, but also continues to widen.
Malama Market, BTW, is a now-closed supermarket in Pahoa Marketplace, at the end nearest the flow.

ETA: Some good new photos and updated maps are now up at the HVO site.

ETA, March 19: No need for a whole new post. The flow near Pahoa is now completely inactive, with active breakouts confined to areas near Pu'u O'o, some mile upslope. A very good thing for the town.

Trebuchet
2015-Mar-26, 03:43 PM
Encouraging words from HVO:


Volcanic Activity Summary: HVO is downgrading the volcano alert level for Kīlauea from WARNING to WATCH. Eruption of lava continues at both the Puʻu ʻŌʻō vent on Kīlauea Volcano’s East Rift Zone and in Halemaʻumaʻu Crater at the volcano’s summit. However, in recent weeks, the Puʻu ʻŌʻō lava flows nearest to the town of Pāhoa became inactive. Because the immediate threat from the June 27th lava flow has been reduced, we are reducing the alert level.


Presently, the only active surface lava occurs in four separate breakouts from the main lava tube within three areas in the upper 6 km (4 mi) of the flow field below the Puʻu ʻŌʻō vent. Lava from these breakouts is moving slowly atop earlier flows and along the margin of the June 27th and the Kahaualeʻa (2013-2014) flow fields. Based on the rate and trajectory of these active flows, we anticipate that it will be at least months before lava could reach to within 1 mile or 1 week of homes or infrastructure.


The ultimate trajectory and path of the lava flow depends on how lava activity evolves in these areas.


Should breakouts along the northern margin of the June 27th flow field become dominant, the resulting lava flow will likely follow steepest lines of descent that approach the Hawaiian Acres and Ainaloa subdivisions.


Should the breakout heading towards the south margin of the June 27th flow field become dominant, the resulting flow will likely parallel the East Rift Zone and approach the Pāhoa area.


At this time, reoccupation of the lava tube that fed lava flows toward the Pāhoa Marketplace area is unlikely. Should this occur, however, delivery of lava farther downslope to the currently inactive extent of the June 27th lava flow field could happen more quickly, perhaps within weeks.


This assessment is based on continued lava production at Puʻu ʻŌʻō at current eruption rates and vent location. Should the eruption rate increase significantly or the locus of eruption shift to a new vent, the conditions of lava flow advance and associated threat could change quickly.


HVO will continue to monitor the volcano closely in cooperation with Hawai‘i County Civil Defense. Daily updates will continue.

Trebuchet
2015-Apr-24, 08:21 PM
Wow, almost a month since I last posted. There hasn't been much news, because active portions of the flow are well upslope from the town and the weather sounds as if it hasn't been suitable for photography and mapping.

Today, however, we've got some new photos and maps, including the lava lake in the overlook crater at it's highest level ever, just 20 meters below the rim.

http://hvo.wr.usgs.gov/activity/kilaueastatus.php

ETA: The overlook crater lava lake is up to just 4 meters below the rim, where it would spill into the main Haleamaumau crater.

Trebuchet
2015-May-04, 03:01 PM
No new lava flow news, partly because of adverse weather, but in any case nothing near the town is active. The big news is up at Haleamaumau, where the Overlook Crater lava lake has overflowed onto the main crater flow several times and has built itself a wall so that it is now "perched". Also a couple of rockfalls from the main crater wall have led to some explosive events. Great pix and videos at the HVO site (http://hvo.wr.usgs.gov/multimedia/index.php?newSearch=true&display=custom&volcano=1&resultsPerPage=20).

Squink
2015-May-05, 07:42 AM
Great pix and videos at the HVO site (http://hvo.wr.usgs.gov/multimedia/index.php?newSearch=true&display=custom&volcano=1&resultsPerPage=20).Haven't seen that in 40 years.
Writeup with pix and history at the Daily Mail (http://www.dailymail.co.uk/news/article-3068288/Hawaii-s-Kilauea-volcano-eruption-sends-lava-rocks-gas-air-crater-wall-collapses.html).

NEOWatcher
2015-May-05, 04:23 PM
Haven't seen that in 40 years.
What exactly have we seen 40 years ago and not since?

Squink
2015-May-05, 04:51 PM
Lava coming up onto the floor of the big crater.

NEOWatcher
2015-May-05, 05:55 PM
Thanks for clarifying. There's too much to keep track of.

Squink
2015-May-06, 03:27 PM
Hawaiian Volcano Observatory (HVO) Webcams page (http://hvo.wr.usgs.gov/cams/) is worth a periodic look these days.

Trebuchet
2015-May-06, 04:25 PM
Yes indeed. I hit the HVO site daily, checking for updates. I need to remind myself to look at the webcams more often.

A couple of months back I looked at the Mauna Load thermal cam and was shocked to see the thermal activity there. Then I noticed the temperature scale, which went from about -4 to +4 C! Oh.

Swift
2015-May-14, 06:55 PM
Just found this video on YouTube from the USGS (https://www.youtube.com/watch?v=NDoIx0lzoWM). Pretty "cool"


A small explosive event that occurred at 1:20 p.m. Sunday, May 3, 2015 at the summit lava lake. A collapse of a portion of the Halemaʻumaʻu Crater wall impacted the lake and triggered an explosion of spatter. Fist-size clasts were found scattered along the rim of Halemaʻumaʻu Crater near the closed visitor overlook. Video courtesy of USGS/HVO

I love the waves rolling around the lava lake.

Trebuchet
2015-May-14, 08:44 PM
Very cool indeed. Since then the mountain has been in a deflationary phase and, last I looked, the lava lake has retreated to 20m below the original crater floor.

Trebuchet
2015-Jun-15, 02:53 PM
A whole month since I updated! Because nothing exciting has been happening, of course. There was a brief flurry of seismic activity shortly after my last post that suggested the Western Rift Zone might become active but that died down within a day or two.

Squink
2015-Jun-17, 12:23 AM
A whole month since I updated!You could try posting to the Iceland thread.
That's been getting pretty sparse as well.
Maybe dgavin's Mt. Axial will go off with a bang and we can have some forum activity again.

Trebuchet
2015-Jun-17, 02:42 AM
Or Mt St Helens. Or Mt Rainier. Or the Yellowstone Supervolcano, which I'll be visiting in a few days!

danscope
2015-Jun-17, 05:59 PM
Just remember: "There is no such thing as an " Extinct Volcano " .

Trebuchet
2015-Jun-18, 12:46 AM
Actually, I think most cinder cones a pretty much one-and-done.

From Wikipedia (https://en.wikipedia.org/wiki/Cinder_cone):

Some cinder cones are monogenetic which means once it erupts, it will never erupt again. Paricutin, Diamond Head, Koko Head, Punchbowl Crater and some cinder cones on Mauna Kea are monogenetic cinder cones but monogenetic eruptions can last for more than 10 years. Paricutin erupted from 1943-1952.

Trebuchet
2015-Jul-23, 05:19 PM
Here's an awesome video (https://www.youtube.com/watch?v=ddzU-rkzKF0) of last fall, which I found courtesy of Dana Hunter at En Tequila Es Verdad (http://freethoughtblogs.com/entequilaesverdad/2015/07/23/the-awesome-power-of-lava-watch-metal-burn/#comment-60769). Dana is one of the few internet acquaintances I've actually met in real life--she comes to my pumpkin tossing.

Meanwhile, it looks like life may getting back to normal in Pahoa. http://www.bigislandvideonews.com/2015/07/01/video-love-bomb-for-pahoa-marks-june-27th-lava-anniversary/

Squink
2015-Jul-26, 11:12 PM
Here's an awesome video (https://www.youtube.com/watch?v=ddzU-rkzKF0) of last fallSo that's how lava deals with chain link fence.
Zinc, the galvanizing on the fence, burns blue, so that yellow flame must be coming from steel or a steel/zinc mix.
Pahoa lava only runs about 900C (http://www.livescience.com/48469-kilauea-lava-flow-speeds-up.html), well below melting point of most steel (https://www.google.com/search?q=steel+melting+points&ie=utf-8&oe=utf-8), and also below the usual ignition point (http://link.springer.com/article/10.1023%2FA%3A1017523922778#page-1).
The Pahoan's might do better to replace their galvanized fences with chrome plated versions.

Trebuchet
2015-Jul-27, 12:04 AM
But as noted before, the fence did a pretty remarkable job of mostly holding the flow in check. As a result, the transfer station suffered little damage and is back in operation.

Pahoa, overall, has had a pretty remarkable escape. Just one house was destroyed. One. The almost-new police and fire station was approached, but the lava never got there. No one was hurt. That's a good outcome.

danscope
2015-Jul-27, 06:51 PM
Surely it wouldn't touch the fire station !! :)

Trebuchet
2015-Aug-13, 10:41 PM
I just realized I hadn't checked the HVO website for a couple of weeks. I didn't miss anything and neither did you. Active lava flows are no farther than 8km from Pu'u O'o and the summit crater lava lake is 70m below the rim.

Trebuchet
2015-Oct-05, 02:38 PM
No news continues to be good news.

Trebuchet
2016-Feb-29, 03:38 PM
I just realized I hadn't checked the HVO pages or updated this thread in a long time. I almost needn't have bothered. Nothing of interest to anybody but actual vulcanologists continues to happen.

Swift
2016-Feb-29, 04:09 PM
I follow Volcano National Park on Facebook (HVO doesn't seem to have an official Facebook page). Except for the lava lake in Halemaʻumaʻu Crater, things are relatively quiet lately.

Gillianren
2016-Feb-29, 05:44 PM
Which is good, because my friend has moved back to Pahoa.