Katla volcano continues to show signs of increased unrest. A small glacial flood occurred from under the volcano's icecap Katla around 28 April 2012 and possibly again around 7-8 May, both times accompanied by increased levels of harmonic tremor. This suggests that magma movements inside the volcano might be heating up the ground, causing increased melting. ...more [read all]

Jón Frímann on his dedicated blog about Icelandic (and not only) volcanoes closely follows what is happening there: a cluster of minor earthquakes has been showing up under the Katla volcano caldera. This has been following a gradual increase in seismic activity under Katla during the past few weeks. It could be a signal of new volcanic activity to be expected on a timescale of few weeks to months. A new eruption would probably be heralded by a strong seismic swarm, and could start and build up rapidly. It did so in July 2011 when a sudden increase in earthquake activity occurred and there was an small eruption without warning. [read all]

Volcanic tremor (a low frequency vibration often caused by magma rising to the surface) has been observed under Katla volcano in southern Iceland, Jón Frímann reports on his Iceland volcanoes blog (see below), closely following seismic activity in Iceland recorded both by national instruments and his own private geophone network. ...more [read all]

Two of Iceland's most known and active volcanoes are showing signs of unrest. Another seismic swarm (after the last one around 3 Feb) occurred at Katla volcano yesterday, although it was weaker than the previous ones. Most likely, the swarm was caused by another shallow dike injection (magma intrusion) beneath the crater, confirming the ongoing unrest at the volcano. ...more [read all]

Small seismic swarms have occurred near Katla volcano (S Iceland), Henggil volcano (SW Iceland) and a weaker swarm near Askja (N-Central Iceland) during the past 48 hours. The cause of the swarms is unclear and their intensity is not alarming. They are not necessarily volcanic, but could related to tectonic stress release around the main Icelandic rift zones. [read all]

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Signs of unrest beneath Katla, one of Iceland's most active volcanoes continue. A seismic swarm was recorded under the northern part of Katla volcano's caldera beneath the Mýrdalsjökull glacier in southern Iceland over the past 48 hours. 35 quakes of up to 3.2 magnitude, many at shallow depths, occrred mostly in the afternoon of 27 Oct. [read all]

A mew seismic swarm is occurring at Katla volcano, with over 60 small earthquakes of magnitudes of up to 2.6 at 1-8 km depth beneath the caldera since Sunday. It could be a possibility that this swarm is caused by the injection of magma at depth, but could also be due to structural displacements. It is unclear whether the recent signs of unrest at Katla are the precursors of a new eruption in a near to medium future. [read all]

A small Small jokulhlaup (glacial flood) has occurred at Katla volcano early on 9 July, possibly due to a (minor phreatic?) eruption under the large icecap covering the volcano. [read all]

It is reported that there was a first subglacial eruption at Katla volcano resulting in a lahar. [read all]

Katla volcano, hidden under the large Mýrdalsjökull glacier in Southern Iceland, located just east of Eyafjallajökull volcano, is showing signs of unrest. In the past 48 hours, 8 earthquakes have occured under the ice cap, which could be a a sign towards a reawakening of the volcano which last erupted in 1918 and is considered overdue. Katla's eruptions are normally accompanied by large and extremely destructive glacier floods, so-called jökulhlaups. ...more [read all]