iceland Bárðarbunga and Askja - Volcanic Activity

[Midlands Ice Age]

Recorded at 4.6 magnitude, but at a depth of 0.1 Kilom. Now that should have shaken things up around the rim.

I think things might be turning interesting.

MIA

[NorthNorfolkWeather]

Recorded at 4.6 magnitude, but at a depth of 0.1 Kilom. Now that should have shaken things up around the rim.

I think things might be turning interesting.

MIA

Yes, it is very shallow, the rim will have been given a good rattle with that.

 

Now let's see if it's done anything.  My concern is that it just moves the strain closer to the surface, possibly not enough fissures to let lava escape (now watch for a full on eruption)

[john pike]

losing the cams again

 

oh well it was good for a while

 

hopefully tomorrow will be better

[john pike]

Wednesday

08.10.2014 18:11:12 64.665 -17.410 2.6 km 3.0 99.0 6.2 km ENE of Bárðarbunga

 

added before the 4.6

[john pike]

Wednesday

08.10.2014 18:48:58 64.671 -17.451 0.1 km 4.6 99.0 5.0 km NE of Bárðarbunga Wednesday

08.10.2014 18:11:12 64.665 -17.410 2.6 km 3.0 99.0 6.2 km ENE of Bárðarbunga Wednesday

08.10.2014 15:24:14 64.680 -17.491 5.1 km 5.2 99.0 4.7 km NNE of Bárðarbunga Wednesday

08.10.2014 15:17:51 64.674 -17.487 3.2 km 3.9 99.0 4.2 km NNE of Bárðarbunga Wednesday

08.10.2014 04:38:32 64.677 -17.455 5.8 km 3.9 99.0 5.3 km NE of Bárðarbunga Wednesday

08.10.2014 04:37:47 64.689 -17.434 6.3 km 3.2 99.0 7.0 km NE of Bárðarbunga

 

not so many quakes today but looks like pressure has increased so there will likely be more tonight

 

all around ne of bara and notice they are getting more shallow

[john pike]

http://so2.gsfc.nasa.gov/pix/daily/ixxxza/loopall_omps.php?yr=14&mo=10&dy=07&bn=iceland

 

so2 chart

 

 

 

i think we have had a few quakes there tonight

 

not big but looks to be on the up

[Pixel]

Been following Jón Frímann’s blog:   http://www.jonfr.com/volcano/?author=2     for a few weeks and someone has posted a great link which shows Bárðarbunga activity on one page:

 

http://weerstationlangerak.nl/bardarbunga/

 

thought it would be nice to share..

 

apologies if this has been already posted in this thread

[Allseasons-Si]

Evening my bardabarians

 

nice to be back on the web,had a little problem with my router last night,it's a good job there wasn't much happening

 

i see barda's been quiet active this evening with that shallow one and a 5.2 earlier

 

i did catch a glimpse of cam one 10-15 minutes ago and there is not much change there

 

as for the gps,it looks busy @ the mo with a preasure lift there,i expect a EQ soon and watch the gps drop,

 

 

and down she goes,for the moment

 

Edited October 8, 2014 by Allseasons-si

[john pike]

another so2 chart

 

http://satepsanone.nesdis.noaa.gov/pub/OMI/OMISO2/iceland.html

 

looks like another night we will have to see what the charts show in the morning

 

hi allseasons

 

good that your back on

 

will talk later

 

john

Edited October 8, 2014 by john pike

[Midlands Ice Age]

Good morning Barbadarians (I liked that)

Overnight things seem to have got very active, more so in terms of the GPS.

The main thing is that the quakes have got much shallower in the last 8hours.

The thing that really stands out is a mag 5.0 at a depth of 0.1kilm.

That must have shaken the cameras!!!!

By the way there is nothing to see on them at the moment.

MIA

Edited October 9, 2014 by Midlands Ice Age

[SteveB]

That's two big quakes (over 4.5) at 0.1km - surely that's going to shake things up a little more.

 

Both look like they were virtually in the same location as well.

 

Looks like the GPS has had a bit of a drop

 

http://en.vedur.is/earthquakes-and-volcanism/gps-measurements/bardarbunga/caldera/

Edited October 9, 2014 by SteveB

[NorthNorfolkWeather]

 

That's two big quakes (over 4.5) at 0.1km - surely that's going to shake things up a little more.

 

Both look like they were virtually in the same location as well.

 

Looks like the GPS has had a bit of a drop

 

http://en.vedur.is/earthquakes-and-volcanism/gps-measurements/bardarbunga/caldera/

I think there was about 300 metres separation on those 2 quakes, as you say very close to the surface.  I wonder what the ice has been doing through all of this?  How much has melted and what size the lake beneath the ice is

Edited October 9, 2014 by NorthNorfolkWeather

[BrickFielder]

  In my last post I suggested something a little different happened Tuesday night and I wanted to show why through the GPS charts provided by the Iceland Met Office.

 

 

Charts available at the following link.

 

http://en.vedur.is/earthquakes-and-volcanism/gps-measurements/bardarbunga/caldera

 

 

My perspective is that there was a lot more movement after the earthquake at 4km deep on Tuesday evening. Recent GPS charts from the University of Iceland suggest movement has gone back to gentle subsidence.

 

Charts available at the following link.

 

http://jardvis.hi.is/gps_timaradir_vid_bardarbungu

 

 

I personally thought this might have been a bit of a game changer but having looked at the charts it seems things have returned to a steady state of eruption at the fissure and subsidence. Well maybe a little drop off in eruption intensity, but some of the tremor reduction may well be due to weather conditions changing.

 

 

Charts are from the Icelandic Met Office site at the following link and I think produced by the university of iceland.

 

http://hraun.vedur.is/ja/oroi/allarsort.html

 

 

I am starting to see some periods of activity in the subsidence at the caldera. In the following chart I have marked out segements where I think activity slightly changed. First up was the immediate period after the tuesday evening earthquake, then a quieter period, followed by resumption of the subsidence and earthquakes and now a slightly different period again.

 

 

Chart is available from the Icelandic Met Office site at the following link.

 

http://en.vedur.is/earthquakes-and-volcanism/gps-measurements/bardarbunga/caldera

 

 

These do not appear to be periods or cycles of unusual activity, but repeating cycles. The cycle I think we are in at the moment is one of the ring faults failing at a relatively shallow depth.

 

These are some of the earthquakes from this morning and over night.

Date                                                                Depth    Strength          Location.

09.10.2014    06:38:10    64.662    -17.443    1.1 km    1.2    90.01    4.7 km ENE of Bárðarbunga
09.10.2014    04:28:50    64.681    -17.310    1.1 km    1.2    75.99    11.3 km ENE of Bárðarbunga
09.10.2014    03:01:50    64.673    -17.485    1.1 km    1.0    74.72    4.2 km NNE of Bárðarbunga
09.10.2014    01:47:17    64.681    -17.440    1.1 km    1.1    90.02    6.1 km NE of Bárðarbunga
09.10.2014    01:46:03    64.685    -17.465    1.1 km    1.1    45.66    5.8 km NNE of Bárðarbunga
09.10.2014    00:37:17    64.617    -17.387    1.1 km    1.3    90.01    7.2 km ESE of Bárðarbunga
08.10.2014    22:44:40    64.678    -17.496    1.1 km    1.4    90.01    4.4 km NNE of Bárðarbunga
08.10.2014    21:26:10    64.679    -17.450    1.1 km    0.8    90.01    5.7 km NE of Bárðarbunga

 

These are all earthquakes at a particular depth (1.1km). Perhaps we should not read too much into these because they are not the strongest earthquakes and may be the types of earthquakes which can be hidden by bad weather conditions.

 

We have also had quite a shallow strong earthquake yesterday evening which will most likely have shaken up the ice covering of the caldera.

Date                                                              Depth     Strength         Location

08.10.2014    18:48:58    64.671    -17.451    0.1 km    4.6    99.0    5.0 km NE of Bárðarbunga

It looks like a ring fault failure from its location , but it does tell us that ring faulting is reaching the surface (as if we did not know based on the subsidence).

 

Unfortunately we cannot really see what is going on with the eruption or whether the river has been further impeded at the moment, so I have a bit of a challenge for any enterprising person.  Can you map out where the ring faults are, reverse faults and magma chambers are based on the following earthquake map from the caldera (No I am not saying its accurate)

 

 

 

To get you thinking I have done an example of where they might be.

 

 

Seems to me there may be an angle to the plumbing below the caldera and rather than being wider at the top it might be wider at the bottom. Current suggestion are that there is probably a magma chamber at around 10km deep, but there are also suggestions that there might be shallow chambers at 2km and 6km.  My personal theory is that there is a sloping magma chamber roof at about 6  to 8 km deep. You should also bear in mind that typically the shape of magma chambers is not exactly uniform.

 

 

That is a representation of yellowstones plumbing.

 

[Sussex Jules]

Brickfielder I wouldn't read too much into those eq you listed 1.1 depth is a holding depth that Iceland Met Office place on them until they are verified. You can tell when they have been manually verified when the last number reads 99 and even then they are subject to change.

[BrickFielder]

Brickfielder I wouldn't read too much into those eq you listed 1.1 depth is a holding depth that Iceland Met Office place on them until they are verified. You can tell when they have been manually verified when the last number reads 99 and even then they are subject to change.

 

Yes I see. All the on duty geoscientists are having a cup of tea or in a meeting and need time to catch up.

[john pike]

Bárðarbunga - updated information

The lava field (over 52 square kilometers) continues to grow. The subsidence of the Bárðarbunga caldera (~30m) continues, at slightly slower rate than before. Seismic activity in Bárðarbunga continues but with less large earthquakes.

It is estimated that the eruption produces 35,000 tons SO₂ daily. Gas emissions at the eruption site are life threatening, gas masks and gas meters are required. There, local wind anomalies can occur due to thermal convection from the lava. Conditions on site are extremely dangerous as winds can change suddenly and unpredictably. Dispersed, the gas can be detected anywhere, see text forecast and an automatic forecast.

 

http://en.vedur.is/

 

link supplied

[Midlands Ice Age]

Barbadarians....

The GPS is currently dropping off the chart.

Will it rise from the ashes soon?

Been out all day playing golf in thunderstorms. Mad mad!!

MIA

[john pike]

http://www.isviews.geo.uni-muenchen.de/index.html

[john pike]

another biggish one

 

http://www.emsc-csem.org/Earthquake/earthquake.php?id=403477

 

4,1

[The PIT]

another biggish one

 

http://www.emsc-csem.org/Earthquake/earthquake.php?id=403477

 

4,1

I heard the Iceland Met office have put screens up showing the England game. Eruption showing instant signs of dying down and snoring sounds have been reported from the caldera.

[john pike]

hi pit

 

lol

[john pike]

Thursday

09.10.2014 19:13:15 64.611 -17.388 8.8 km 4.8 99.0 7.4 km ESE of Bárðarbunga

[Allseasons-Si]

Evening barda watchers

 

a few biggies incoming,4+'s maybe

 

 

A few un-checked 2+'s

 

http://baering.github.io/

 

 

[john pike]

http://www.emsc-csem.org/Earthquake/earthquake.php?id=403515

 

4.4

[Allseasons-Si]

http://www.emsc-csem.org/Earthquake/earthquake.php?id=403515

 

4.4

There should be a couple more to come too John,we shall see.

 

a bit of a jolt up on gps,then heading down.