Big mag 8.1 (shallow, 20km) off the southern coast of Alaska just now (USGS). Preliminary tsunami warning issued for Hawaii with arrival due 1426UTC.
Now getting more active:Öræfajökull has been experiencing a swarm of minor earthquakes since midsummer which might indicate it is waking back up. This particular beauty produced Icelands’s largest known explosive eruption of the last 1000 years when it kicked off in 1362 (the last but one eruption, the other being a lesser one in 1727).
Öræfajökull volcano is showing clear signs of unrest with an inflation phase for at least a year and a half. The inflation is ongoing and it is reflected by increased seismic activity and characteristic deformation pattern. There are no signs of decrease in the inflation rate or the seismicity. The state of unrest persists despite a decrease in geothermal activity since last December. The source causing the inflation is most likely injection of new magma. The volume change since the start of the unrest is of the order of magnitude of 10 million m3 (about 0.2 m3/sec) comparable to the intrusion activity in Eyjafjallajökull some years before the eruption in 2010. New resistivity measurements indicate the presence of geothermally altered rocks at shallow levels inside the caldera consistent with intermittent high temperature geothermal activity as seen in many other volcanoes.
Öræfajökull is in a typical preparation stage before an eruption but the temporal evolution and the outcome is unknown. Increase in the geothermal activity with associated floods and gas release is a possible scenario.
Did the earth move for you cupid_stunt?
A minor 3.6 earthquake happened near the south coast yesterday.
Earthquake info : M3.6 earthquake on Wed, 27 Feb 03:42:21 UTC / ENGLAND, UNITED KINGDOM - 52 experience reports
But three geologists at Edinburgh University, including one who attended the OGA workshop, concluded before this month’s earth tremors:
“Future oil exploration and production close to critically-stressed faults in the Weald is likely to result in similar earthquake events.”
Update: Record-level earthquake in Newdigate, Surrey – calls for reopening of inquiry into links to oil industry
Near the south coast? Have they moved Surrey, and not told me?
Glad nothing seemed to come from it. 6.8 is pretty strong.Felt this (even though it was miles and miles away) whilst watching the scene in Good Omens where the apocalyptic storm is kicking in!