iceland Bárðarbunga and Askja - Volcanic Activity

[karyo]

Amazing stuff - there has been some talk on the various sites about 6+ earthquakes needed to cause some sort of structural damage to the volcano, but I wonder if actually repeated lower level quakes might have a similar effect.  The GPS thing has been showing a continued decline.

I think there need to be frequent earthquakes like the ones happening now as opposed to one or two large ones a day. The M5 quakes appear to be doing a small difference to the caldera but nothing decisive. 

[karyo]

There's active and there' ACTIVE.

 

Look at this lot

 

Saturday

20.09.2014 17:11:41 64.675 -17.472 8.4 km 5.0 99.0 4.7 km NE of Bárðarbunga Saturday

20.09.2014 17:05:49 65.138 -16.323 7.7 km 1.7 99.0 4.2 km SSE of Herðubreið Saturday

20.09.2014 17:05:47 64.611 -17.496 1.0 km 4.4 99.0 3.6 km SSE of Bárðarbunga Saturday

20.09.2014 17:04:48 64.616 -17.475 4.8 km 4.0 99.0 3.7 km SE of Bárðarbunga Saturday

20.09.2014 17:02:02 64.674 -17.484 7.3 km 3.6 99.0 4.3 km NNE of Bárðarbunga Saturday

20.09.2014 17:00:56 64.671 -17.403 7.7 km 3.4 99.0 6.8 km ENE of Bárðarbunga

 

 

Stress around the caldera now starting to ripple it's way out as soon as a quake hits,.  look sto me as those faults are very stressed and one of them only 1Km down

 

You only need 10 M5 quakes to be equivalent to an M6 (but 100 M4).  Anything over M5 brings us closer to what I expect will be an interesting eruption.  We are also now getting closer to new moon, sun and moon acting together, molten rock is much denser than water, but there will still be an effect

That's crazy!

 

Meanwhile the fissure plume is looking pretty large today!

[Allseasons-Si]

WOW,some big EQ's there and in close prox to each other

 

meanwhile,i have found this,don't know if you all know this site,barda auto refresh.

 

http://weerstationlangerak.nl/bardarbunga/

[Yarmy]

There's active and there' ACTIVE.

 

Look at this lot

 

Saturday

20.09.2014 17:11:41 64.675 -17.472 8.4 km 5.0 99.0 4.7 km NE of Bárðarbunga Saturday

20.09.2014 17:05:49 65.138 -16.323 7.7 km 1.7 99.0 4.2 km SSE of Herðubreið Saturday

20.09.2014 17:05:47 64.611 -17.496 1.0 km 4.4 99.0 3.6 km SSE of Bárðarbunga Saturday

20.09.2014 17:04:48 64.616 -17.475 4.8 km 4.0 99.0 3.7 km SE of Bárðarbunga Saturday

20.09.2014 17:02:02 64.674 -17.484 7.3 km 3.6 99.0 4.3 km NNE of Bárðarbunga Saturday

20.09.2014 17:00:56 64.671 -17.403 7.7 km 3.4 99.0 6.8 km ENE of Bárðarbunga

 

 

Stress around the caldera now starting to ripple it's way out as soon as a quake hits,.  look sto me as those faults are very stressed and one of them only 1Km down

 

You only need 10 M5 quakes to be equivalent to an M6 (but 100 M4).  Anything over M5 brings us closer to what I expect will be an interesting eruption.  We are also now getting closer to new moon, sun and moon acting together, molten rock is much denser than water, but there will still be an effect

An effect so tiny that it would not be possible to measure it. It is the extent of the mass that really matters in a tidal force, not the material. There has to be a difference between the strength of the gravity at one end of the mass to the other. The difference is miniscule on a magma chamber. There will be a measurable effect on an entire continental plate though.

[NorthNorfolkWeather]

An effect so tiny that it would not be possible to measure it. It is the extent of the mass that really matters in a tidal force, not the material. There has to be a difference between the strength of the gravity at one end of the mass to the other. The difference is miniscule on a magma chamber. There will be a measurable effect on an entire continental plate though.

 

I agree that it's very small, but wasn't sure whether you were saying it would or wouldn't have an effect

[Rustynailer]

I have experienced first hand a 5.4 in the UK in 1984.   Shake-m baby ...

 

 

 

 

[NorthNorfolkWeather]

WOW,some big EQ's there and in close prox to each other

 

meanwhile,i have found this,don't know if you all know this site,barda auto refresh.

 

http://weerstationlangerak.nl/bardarbunga/

Yes, 3 over M3 in the north/east quadrant and 2 in the south/east quadrant wonder whether the first 2 (one ENE and one NNE) set off the third (which was spal bang in the middle (NE)

[john pike]

http://baering.github.io/

 

a quick look at that shows how much its rattled today

[Yarmy]

I agree that it's very small, but wasn't sure whether you were saying it would or wouldn't have an effect

Sorry, I mean there's no effect for the current events.

[karyo]

The quietness has resumed! I guess she is resting after all this activity.

[Yarmy]

I have experienced first hand a 5.4 in the UK in 1984.  K189.JPG Shake-m baby ...

I survived the Market Rasen 5.2 in 2008. :-)

60 miles or so from the epicentre, but a very odd sensation nonetheless.

[john pike]

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

 

if you want to see the strength difference between different size quakes

 

please read the above link

[karyo]

I survived the Market Rasen 5.2 in 2008. :-)

60 miles or so from the epicentre, but a very odd sensation nonetheless.

I have experienced a handful of M5+ earthquakes in Greece! They make you realise how powerless we really are!

[karyo]

Another M3.5 in the caldera! Maybe she is not in the mood for a long rest.

 

Edit: Make them two!

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/

Edited September 20, 2014 by karyo

[john pike]

[karyo]

I have a party to go to but instead I am glued to the laptop! lol

[john pike]

hi karyo

 

eastenders eat your heart out

Edited September 20, 2014 by john pike

[karyo]

hi karyo

 

eastenders eat your heart out

Looooooool

 

The webcam looks awesome by the way!

[john pike]

agree mate

 

this also in on its way back up again

[john pike]

Saturday

20.09.2014 21:01:02 64.667 -17.460 2.9 km 3.5 99.0 4.4 km NE of Bárðarbunga

[karyo]

Saturday

20.09.2014 21:01:02 64.667 -17.460 2.9 km 3.5 99.0 4.4 km NE of Bárðarbunga

 

Wow, another one!

 

Right got to go, see you tomorrow 

[john pike]

http://www.grdphotos.com/p514913012/h3373972D#h3373972d

 

some superb pictures in the link above

[john pike]

 

Blue volcanic haze in Reykjavik

Fyrst birt: 20.09.2014 21:32, Síðast uppfært: 20.09.2014 21:56

 

Bardarbunga volcano was still shaking and sinking Saturday, and scientists reported no significant changes in the ongoing lava eruption at Holuhraun lava field. Haze from the eruption was reported from most parts of Iceland.

Sulfur dioxide pollution from the eruption brought blue volcanic haze to the capital Reykjavik, though the gas did not reach unhealthy levels. Similar haze was reported from all over the country, according to the Icelandic Met Office.

The great extent of the pollution was caused by a high-pressure area over Iceland, which is expected to pass late Saturday and early Sunday. People reported discomfort in Modrudalur and Sprengisandur, both located in the highlands, relatively close to the eruption.

Photo: Hallgrimur Indridason.

13 earthquakes of magnitude 3.0 or above were detected at Bardarbunga from midnight to 21:00 GMT Saturday. The largest were a M5.1 at 01:10 GMT and a M5.0 at 17:11 GMT. 

The eruption in Holuhraun, north of Bardarbunga volcano, has continued with a similar rate as in the last few days, according to scientists, with most of the lava coming up around the middle of the fissure. 

GPS monitoring continues to show subsidence in the Bardarbunga caldera, and crustal movements indicate that the volume of magma in the dike intrusion, which feeds the lava eruption, is still increasing slightly, scientists say. They still do not rule out a subglacial eruption at Bardarbunga's caldera, although there are no direct signs of that being imminent. If Bardarbunga erupts, significant production of ash is expected, as well as flooding caused by the glacier melting. Check out this video where we explain what's going on beneath the surface.

This graph shows the subsidence of Bardarbunga caldera in meters in the last two days. The graph at the bottom shows earthquakes in the area in the same period. Notice the sudden increase in subsidence when the M5.3 earthquake struck Thursday.

 

This story, by the Icelandic National Broadcasting Service (RUV), was updated on 20 September 2014, at 21:25 GMT.

 

http://www.ruv.is/frett/blue-volcanic-haze-in-reykjavik

[john pike]

News - follow us on Facebook https://www.facebook.com/Almannavarnir   Twitter @almannavarnir and webpage on Bárðarbunga www.avd.is/en

20.09.2014
Map of possible gas pollution in Iceland made by the Icelandic Met Office. See also guidelines on the webpage of the Environment Agency www.loftgaedi.is 

 

Morgundagurinn, stækkanlegt.  A new simulation is beeing developed (Calpuff). The latest simulation can be accessed here nýjustu keyrslu
 
http://www.vedur.is/vedur/spar/textaspar/oskufok/

[john pike]

Saturday

20.09.2014 23:00:10 64.634 -17.369 1.8 km 3.4 99.0 7.6 km E of Bárðarbunga. Saturday

20.09.2014 22:59:08 64.618 -17.396 1.5 km 3.1 99.0 6.7 km ESE of Bárðarbunga.

              Saturday

20.09.2014 22:46:28 64.672 -17.476 8.8 km 3.9 99.0 4.3 km NE of Bárðarbunga.

 

 

 

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/#view=map