Sabancaya volcano (Peru): strong seismic swarm

Fri, 19 Jul 2013, 01:19 | BY: T

Recent earthquakes near Sabancaya volcano

Seismic recording from late on 18 July (SAB station, IGP)

A strong seismic swarm has occurred during the past days under the volcano, culminating in a magnitude 5.9 earthquake on 16 July. The swarm consisted almost entirely of volcanic-tectonic quakes, that relate to rock fracturing due to rapid pressure changes and might be caused by an intrusion of magma. IGP reports that up to 1500 earthquakes were recorded per day.
At the moment, the swarm still continues, but is decreasing. No changes of activity have been noticed at the surface. The number of long-period quakes (thought to correspond to internal movements of magma, gasses and other fluids) has remained low.

All news about: Sabancaya volcano
Information about: Sabancaya volcano

Previous news

Tue, 11 Jun 2013, 11:33

Sabancaya volcano (Peru) activity update

Seismicity (number of quakes) during the past months (IGP)

Seismic unrest continues. Earthquake numbers have shown a light increase since May, the latest report of IGP from 5 June shows. Read all

Mon, 27 May 2013, 06:03

Sabancaya volcano (Peru): no recent eruptions, seismic unrest continues

The crater of Sabancaya volcano on 21 May 2013 (IGP)

The volcano has remained quiet, but is still showing signs of unrest. IGP scientists found evidence of eruptive activity (no fresh lava or pyroclastic deposits) inside the crater of of the volcano during a helicopter survey on 21 May. Only steaming and degassing were observed from the crater, that measures about 300-350 m in diameter and is 200 m deep. Read all

Thu, 16 May 2013, 09:07

Sabancaya volcano (Peru) activity update

Current seismic recording from Sabancaya volcano (BHZ station, IGP)

Seismic activity has calmed down a bit compared to the previous weeks. ... Read all

Tue, 14 May 2013, 15:17

Sabancaya volcano (Peru): seismic unrest and ground deformation

Ground deformation (deflation) at Sabancaya volcano measured by InSAR (IGP)

The possible ash emissions on 9 May have not been confirmed, but unrest in the form of increased earthquake activity and ground deformation has increased since early May, the Geophysical Institute of Peru (IGP) reported in its press release on 10 May. ... Read all

Sun, 12 May 2013, 16:35

Sabancaya volcano (Peru): possible ash emissions

Possible eruptions have started at the volcano. Pilots reported several volcanic ash plumes from the volcano in the past days although VAAC Buenos Aires could not identify ash on satellite imagery. ... Read all

Wed, 8 May 2013, 06:00

Sabancaya volcano (Peru) - Smithsonian / USGS Weekly Volcanic Activity Report for 8 May-14 May 2013 (Continuing Activity)

On 10 May Instituto Geofísico de Perú (IGP) reported that results of an interferogram of Sabancaya provided by a collaborator at Cornell University showed that an area of deformation (subsidence of 7 cm centered at 6 km NE of the crater) was coincident with the main area of seismicity. Volcano-tectonic (VT) earthquakes continued to dominate the seismic signals, although long-period (LP) events continued to be detected. There was also an increase of hybrid events. ... Read all

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Sabancaya volcano (Peru): strong seismic swarm

Previous news

Sabancaya volcano (Peru) activity update

Sabancaya volcano (Peru): no recent eruptions, seismic unrest continues

Sabancaya volcano (Peru) activity update

Sabancaya volcano (Peru): seismic unrest and ground deformation

Sabancaya volcano (Peru): possible ash emissions

Sabancaya volcano (Peru) - Smithsonian / USGS Weekly Volcanic Activity Report for 8 May-14 May 2013 (Continuing Activity)

Sabancaya volcano (Peru): decreasing seismic unrest

Sabancaya volcano (Peru): continuing earthquakes, degassing

Sabancaya volcano (Peru) - Smithsonian / USGS Weekly Volcanic Activity Report for 3 April-9 April 2013 (Continuing Activity)

Sabancaya volcano (Peru) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 March-2 April 2013 (New Activity / Unrest)

More on VolcanoDiscovery

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