During 2011 and the first months of 2012, the number of earthquakes detected at Santorini has been slightly above background levels. The quakes were concentrated in the volcanically and tectonic active SW-NE zone passing through the caldera and the submarine volcano Kolumbus to the NE. An inflation of Nea Kameni has been detected, suggesting that a magmatic intrusion took place. As of June 2012, the volcanic unrest has calmed down, but we will follow the developments closely and post updates on this page.Live seismic data & webcam
Read also: Santorini volcano - when will the next eruption occur?
Santorini volcano unrest 2011/12:
Update Wed 30 Jan 10:06According to the latest seismic and satellite (InSAR and GPS) data, the uplift at the Santorini volcano (2011-2012) has has come to an end.
Read the whole entry
Update Thu 03 Jan 11:30
Small earthquake swarm near Amorgos Island
Update Fri 28 Dec 01:46
Update Wed 26 Dec 11:20Some earthquakes in slightly elevated numbers have reappeared at Santorini. For now, this might mean nothing much unusual, but it is a volcano we closely watch for obvious reasons.
A not entirely serious update on volcanic tremor on Nea Kameni
Update Wed 17 Oct 18:56
Unusual seismic activity at Santorini?
Update Sat 22 Sep 09:55In recent days, many posts have sprung up again speculating about increased seismic activity at Santorini.
We cannot see any such. The live seismic recordings show normal noise, day-time activities and weather signals as well as spikes from quakes throughout the region all the time but most likely has not much to do with the volcano.
No unusual concentration of earthquakes has occurred near the island in the past weeks.
Decreasing seismic activity
Update Wed 22 Aug 01:02
What caused the inflation and quakes during 2011-early 2012 has stopped doing so at least for now. Most likely, that was magma rising from depth into shallow reservoirs beneath Nea Kameni (called an intrusion), and has now "settled" and is slowly cooling without making it to the surface, i.e. erupt.
2.7 quake SW of Santorini - the seismic signal
Update Tue 14 Aug 19:12This is what a (small) magnitude 2.7 earthquake in 25 km distance at 20 km depth looks like on the seismograms of Santorini and gives an idea about how sensitive they are.
You can see the quake at 16:07 in today's earthquake list.
New volcanic tremor?
Update Thu 09 Aug 16:08
This fits the observation that the apparent increase of seismic activity usually is visible after about 7am local time (see images). This is true for most stations except perhaps the one on Nea Kameni which usually reflects noise induced by visitors on the island during the day, but had some strong signals outside this normal time during the past days. This could very well be malfunctioning, but we cannot know, unfortunately.
At the moment, there is no official statement about whether anything out of the usual is going on under Santorini seismically. No particularly increase number of earthquakes have been published.
Even if there was, one might doubt that authorities would say anything that could sound alarming about the volcano right now, around the peak of the summer, i.e. 15 August...
Check online seismic data at: webcams.volcanodiscovery.com/Santorini
Update Mon 30 Jul 18:24
Update Fri 22 Jun 11:40No significant seismic activity has been recorded at Santorini recently. It seems that the probable magmatic intrusion that started deformation and seismic unrest since 2011 is coming to an end.
Update Wed 23 May 19:17No significant seismic activity has taken place at Santorini over the past days.
Small earthquake swarm on SW part of Santorini
Update Wed 16 May 08:29
Earthquake swarm on the Kolumbus line
Update Thu 10 May 07:15
Earthquake swarm SW of Santorini
Update Fri 04 May 09:47During the past weeks, Santorini has been relatively calm. A few earthquakes occurred mainly SW and NE of the island recently, showing that unrest continues.
Notably another small seismic swarm occurred in the area of the early January swarm at a tectonic fault line located 50 km SW of the island between 28 and 30 April. The quakes were at depths around 5-15 km and included 3 quakes around magnitude 3, the largest quake being a 3.7 magnitude at 10 km depth on 30 April.
Small earthquake swarm at Santorini
Update Wed 11 Apr 15:43
Update Thu 05 Apr 13:18We have just visited Nea Kameni volcano. There are no visible changes. An infrared thermal camera has been installed to monitor Georgios crater.
Earthquake swarm south of Santorini
Update Wed 04 Apr 16:40
Archived older activity updates:Part 2 (Jan-March 2012)
Part 1 (2011)