Cerro Negro de Mayasquer volcano (Colombia-Ecuador): increased seismic activity
mer, 15 giu 2022, 17:0617:06 PM | AUTORE: MARTIN
Distribution of quakes in the Cerro Negro de Mayasquer volcano and Potrerillos area during 12-14 June (image: IGEPN)
The IGEPN geophysical institute in collaboration with the Pasto Volcanological and Seismological Observatory (OVSP) reported that a moderate seismic activity has been registered at the volcano complex and Potrerillos area.
Ground deformation data between 2016 and June 2022 (image: IGEPN)
A number of earthquakes have been felt on the borders with Colombia located about 9 km SE of the Cerro Negro volcanic complex during 12-14 June.
The Potrerillos zone corresponds to where quakes have been occurring since 2014. A series of large quakes have been detected since this year. This includes an earthquake on 20 October 2014 with magnitude M 5.7. Few quakes were recorded with magnitudes of 3 or more throughout the following years. Given the relationship between the volcano location and fault zones (El Ángel et al), a high likelihood of quakes is in place.
This has followed a pattern of gradually increasing inflation from 2014 until the end of 2020 which has changed to stable levels and this trend continues. The ground has been uplifted by 32 mm since April 2022 which is 4 mm more than the average uplift during the 2016-2022 period.
Source: Instituto Geofísico volcano activity update 15 June 2022
Wed, 7 Aug 2019, 12:05
Cerro Negro de Mayasquer and Chiles volcanoes (Ecuador, Colombia): continuing earthquake swarm indicates magma at depth
Instituto Geofísico de la Escuela Politécnica Nacional (IGEPN) and the Observatorio Vulcanológico y Sismológico de Pasto del Servicio Geológico Colombiano (SGC OVSP) jointly reported that the most recent seismic swarm below Cerro Negro de Mayasquer and Chiles volcanoes began in September 2018 and continued at least through 1 August. ... Read all
Wed, 31 Jul 2019, 06:00
Chiles-Cerro Negro volcano (Colombia-Ecuador) - Smithsonian / USGS Weekly Volcanic Activity Report for 31 July-6 August 2019 (Continuing Activity)
Instituto Geofísico de la Escuela Politécnica Nacional (IGEPN) and the Observatorio Vulcanológico y Sismológico de Pasto del Servicio Geológico Colombiano (SGC OVSP) jointly reported that the most recent seismic swarm below Cerro Negro de Mayasquer and Chiles volcanoes began in September 2018 and continued at least through 1 August. The swarm has consisted of 147,000 earthquakes, recorded up to the time of the report publication, mostly with magnitudes less than 3.6. Notably, at least 91 very-long-period earthquakes and 89 long-period earthquakes have been detected, indicative of a magmatic body at depth. ... Read all
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