by an approximately 70 km long and 15 km wide left lateral shear zone, the
South Iceland seismic zone (SISZ). Approximately every 100 years a sequence of large
earthquakes of magnitudes M 6-7 occurs in the zone and traces of many Holocene faults
have been mapped on the surface. Although the trend of the zone is east-west, major
earthquakes take place on north-south striking faults, which leads
/media/vedurstofan/utgafa/skyrslur/2010/2010_003rs.pdf
of faulting took place during the June 2000 earthquake sequence in southern Iceland.
The star denotes the source of the large earthquake that occurred south-west of Ingólfsfjall.
Significant earthquake activity has taken place west of the main fault; this is the location where a magnitude 5 earthquake occurred in November 1998, making it unlikely that a large earthquake will occur in this region
/about-imo/news/nr/1312
monthly bulletin was that of April 2015.
Apart from the destructive earthquake in Italy and the nuclear explosion in the DPRK, the most
significant seismic events recorded by the seismic service at GEUS in the recent period, are a sequence
of earthquakes in the Disko Bay area in West Greenland. Since the beginning of the sequence on April
5th 2016, 95 earthquakes have been
/media/norsem/norsem_voss.pdf
earthquake activity north of GrindavíkRecent data show
that uplift has started again, with the center just west of Mt. Thorbjorn.
Uplift was measured from 22. January 2020 until beginning of February and has
started up again during the first half of March. During the first sequence in
January-February, the deformation rate was about 3-4 mm per day with a total of
a 6 cm uplift during the whole
/about-imo/news/more-research-is-needed-to-decipher-the-on-going-activity-at-the-reykjanes-peninsula-as-a-whole
deformation data has evidenced that the earthquake swarm is caused by magma intrusion.
Throughout the whole sequence until now (18th August at 20:45) the majority of events has been at 5-10km depth. No signs of migration towards the surface or any other signs of imminent or ongoing volcanic activity have been detected so far. IMO is monitoring the area around the clock very closely
/about-imo/news/nr/2942
of Kópasker. The earthquake was felt in Svarfaðardalur, around 90 km from
the epicenter. It was followed by an aftershock sequence including a
magnitude 2.9 earthquake. This new swarm occurred about 60 km
south-east of the Grímsey swarm and is also on the Grímsey
Oblique Rift zone (GOR). The M3.6 earthquake in Öxarfjörður had
left-lateral strike slip focal mechanism while the ~ M5 earthquakes close
/about-imo/news/seismic-swarm-east-of-grimsey-on-the-decline
Earthquake sequence east of Grímsey
2.4.2013
A M5.5 earthquake occurred at 00:59 on 2nd April 2013 about 15 km east of Grímsey island offshore North Iceland. The earthquake was felt at Grímsey, Húsavík, Raufarhöfn, Mývatnssveit, Akureyri and Sauðarkrókur
/about-imo/news/nr/2681
on February 16, is significantly less
than the 2013 sequence, see older news, although
this swarm is more steady. Continuous GPS measurements in Grímsey show no detectable deformation associated with the swarm, suggesting that the
swarm is tectonic in nature although geothermal activity in the area may act as
a trigger. There is no sign of magmatic activity.This area is an active
seismic
/about-imo/news/grimsey-earthquake-swarm
decreasing over time. The acquisition of recent satellite images enabled mapping
of new surface deformation in the area associated with the sequence of large
earthquakes which occurred between the 18th and 20th of July. The satellite
data processing clearly shows a deformation signal corresponding to
approximately 3 centimeters of movement along a NE-SW oriented fault in the
region of Fagradalsfjall
/about-imo/news/update-on-the-activity-in-the-reykjanes-peninsula
caldera.Throughout the whole sequence
until now, the majority of seismic events have been calculated to be at 5-10 km depth. There is no
sign of upward migration. The event rate is still high. ~4000 events have been automatically
detected since the beginning of the swarm on Saturday morning, ~700 since midnight today.
Activity ebbs and flows in pulses of several hours lengths. The last pulse of high
/media/jar/Daily_status_report_200814.pdf