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.
Mi, 7. Aug 2019, 12:0512:05 PM | VON: T
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. In addition, at 07:38 on 25 July 2019, a M4 earthquake was located 4 km below the summit of Chiles and felt by residents. About 850 volcano-tectonic events were recorded during 25-28 July.
Source: Smithsonian / USGS Weekly Volcanic Activity Report 31 July-6 August 2019
So, 24. Mai 2015, 12:15
Seismic activity at the volcano has been decreasing during the past months. No other signs of volcanic unrest have been detected. ... Read all