Volcanic activity worldwide 26 Aug 2014: Stromboli volcano, Bárdarbunga
Tuesday Aug 26, 2014 21:00 PM |
View onto the upper part of the lava flow early on the 10th of August, showing the trajectory of the lava from the vent down onto and across the plateau before it flows down the Sciara del Fuoco. Only the vent at the origin and the overflow from the plateau are visible from the 400 m webcams.
Stromboli (Eolian Islands, Italy): (25 Aug) After fluctuating and unstable effusive activity during the last few days, the vent seems to have once again increased its magma effusion rate and triggered a new pathway for the lava to flow down the upper part of the Sciara del Fuoco.
Recent earthquakes at Bardarbunga volcano (marker shows this morning's magnitude 5 quake)
Whilst on the afternoon of the 23rd of August lava was still flowing down from the plateau in much the same location as it had done since opening of the vent on the 7th of August, the overflow of lava from the ca 600 m plateau onto the Sciara del Fuoco had substantially decreased by the early hours of the 24th of August.
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Bárdarbunga (Iceland): According to the Icelandic Met Office, approx. 50 million cubic meters of magma have been added to the current intrusion during the past 24 hours. This corresponds to an average of approx. 500-600 cubic meters a second!
Seismic activity remains high with no signs of weakening. If the intrusion breaches the surface, the most likely scenario seems to be a fissure eruption at the present location of the northern end of the dyke, i.e. immediately north of the Dyngjujökull glacier.
The earthquake this morning at the north/northwestern part of the caldera at 6 km depth at 01:26 UTC could have been the biggest in the current swarm. Estimated magnitudes range from 4.1 (IMO) to 5.7 (USGS).
The magma intrusion (dyke) north of Dyngjujokull is still migrating and stretches now approx. 10 km outside of the glacier.
It will be interesting to see what happens when it reaches the area of the Asjka fissure swarm. A possibility could be that older dykes from that one stop the propagation of the Bardarbunga intrusion, another that it activates Askja as well.
The seismic swarm continues to be intense and continues with no significant changes. A magnitude 5 quake occurred this morning 01:26 UTC northeast of the central volcano.
Approx 1500 quakes had been registered during yesterday. The tip of the earthquake cluster has migrated further and is now 6-7 km north of Dyngjujökull glacier below ice-free land surface. According to IMO, there are no signs of an impending eruption as the quakes remain mostly at 5-12 km depth.
Monday, Aug 25, 2014
Bárdarbunga (Iceland): The latest offical briefing from the Icelandic Met Office confirms that seismic activity continues to migrate northwards with earthquakes below Bárðarbunga becoming weaker. An eruption in the Bárdarbunga caldera is therefore at present considered to be less likely. ... read all
Sunday, Aug 24, 2014
Saturday, Aug 23, 2014
Friday, Aug 22, 2014
Thursday, Aug 21, 2014
Volcanic activity worldwide 21 Aug 2014: Stromboli volcano, Bárdarbunga, Dukono, Kusatsu-Shirane, K...