Filski
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Posts posted by Filski
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Just eyeballing the graph below, but it would seem that large quakes are growing in number, but reducing slightly in strength. Have been reading comments that they are increasingly shallow.
There are several conclusions one could draw from that I imagine.
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Iceland radar showing persistent echo over bardarbunga since 9pm?
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The unsmoothed GPS trace is going nuts, most erratic since it was placed.
Could be 2 things. 1. Weather, related to that which suddenly obscured to cams, 2. The surface is indeed moving following the last EQs. This might signal water has penetrated the cap and, as the wind is blowing towards the webcams, steam might be obscuring the view.
I suspect a full blown eruption would turn the cams orange rather than black
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The gradient of the line on the Bardabunga GPS is not as steep the last 24hrs. No big drops with the recent quakes either.
Potential sign that deflation is slowing?
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The GPS just keeps dropping. Disappearing into a crevasse?
Nearly bedtime here, hope I don't miss anything.
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If it is an ice quake then it's not like any other. 70sq km in area and 700m thick. I don't know if the maths works or not.
The GPS is still dropping rapidly though. Although the timescale will even things out, it looks like there is a 80cm in only a couple of hrs now.
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Finally showing up, depth as 0.1m.
Theory: This is an ice quake. As the bottom of the caldera sinks predominantly in the NE, occasionally these big shallow ones are the ice sliding in that direction.
The depth of the collapse in that quake is showing as 60-70cm - possibly the largest single drop yet.
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Significant drop on the GPS, need to wait a bit though to see how much as the trend line makes the short time frame much larger. I think it may be around 60cm though, not the 1m+ its currently showing.
It continues to lessen, maybe 40cms?
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First time in a while that no big quakes are showing at Barda.
The GPS measurements on the Caldera aren't dropping at the moment (sorry, it's on livestream and I can't find the source), after nearly continuous subsidence for a while. It would be wrong to say it's definitely building up to something, it's just stationary. Still though...
Could be signs that the eruption is going to fizzle out. But it could be signs that something is preventing further subsidence - a change in what goes on below. Note that tremor is rising though...
We just have to wait and see.
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Scale is hard to judge. The mounds/ fountains look maybe 10-20m high to me and I have to remind myself it is 50-70m high - which is staggering really.
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Sudden jump in inflation?
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ruv.is/frett/botn-bardarbunguoskju-seig-um-25-sm
Translation of 1st 2 paragraphs
Bottom Bárðarbunga caldera sank by 25 centimeters at a time when there was a 4.9 earthquake. Þetta sýnir GPS - mælir sem komið var fyrir ofan á bungunni à fyrradag. This shows GPS - meter was placed on top of the dome yesterday. Enn er talsverð vikrni à gosinu à Holuhrauni en dregið hefur úr skjálftavirkni við kvikuganginn. There is still considerable pumice from the eruption of lava pocket but slowed the earthquake swarm corridor. Enn skelfur þó à Bárðarbungu. Still trembling though Bárðarbunga.
Spár Veðurstofunnar gefa til kynna að styrkur brennisteinsdÃoxÃðs frá eldgosinu à Holuhrauni verði mikill, frá Héraði að norðanverðum Austfjörðum til kvölds, en sÃðan færist mengunarsvæðið norðyour og verðyour frá Langanesi til Tjörness á morgun. Weather service forecasts indicate that the concentration of sulfur dioxide from the eruption of lava in the hole will be great, from the province to the northern east coast until evening, and then moves north and pollution of the area will be from the Northeast to Tjörnes tomorrow.
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Automatic I assume, Depths and strength vary according to where you look.
Date Time Latitude Longitude Depth Magnitude Quality Location Saturday
13.09.2014 07:58:15 64.673 -17.404 1.1 km 2.6 90.1 6.9 km ENE of Bárðarbunga -
Showing on USGS less than an hour ago. M 5.0 - 116km S of Akureyri, IcelandTime 2014-09-13 17:58:17 UTC+10:00
Location 64.655°N 17.623°W
Depth 9.8km
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Aurora on the live stream!
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Askja - anybody have any ideas?
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That's a lot of activity in the caldera in the last little while.
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Drone video of the eruption from what I guess is yesterday
https://www.facebook.com/video.php?v=944907378857060&set=vb.933177740030024&type=2&theater
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https://www.youtube.com/watch?v=JQVYpKRBoj8
Video links weren't working for me earlier so updating with the above (plus its a new page so make it easy)
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Having a laugh at the truck parked just below the cam.
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Does the uptick in the strain mean anything? It's been going up and up since this mornings shallow 5.5.
I thought perhaps the water flow looked stronger (in comparison to earlier captures) from the direction of the ice but could be mistaken too.
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Yeah, been watching it for a few minutes, something is going on.
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If Bada caldera goes up they won't be a tsunami as it's far too inland. The caldera collapse could still be relatively quite affair. The big danger is if the magma is suddenly drawn off. At the moment this isn't happening allowing a steady sinking. If the magma is suddenly withdrawn the collapse will be round the ring fractures as too how big it will be nobody knows. The other possibility the slow sinking will continue with some Pheatic explosions blowing smaller caldera's or craters.
I'm guessing it would resemble this at the end.
Bárðarbunga and Askja - Volcanic Activity
in Space, Science & nature
Posted
Don't know if this is new to anyone, seems to be 2 weeks old
http://brunnur.vedur.is/pub/vatnavakt/bardarbunga/vmr_20141015_mtg_fp.pptx