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.
mer, 31 lug 2019, 06:0006:00 AM | AUTORE: VN
In addition, at 0738 on 25 July 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: Instituto Geofísico-Escuela Politécnica Nacional (IG)
From: Global Volcanism Program, 2019. Report on Chiles-Cerro Negro. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 31 July-6 August 2019. Smithsonian Institution and US Geological Survey.
Wed, 28 Nov 2018, 06:00
Chiles-Cerro Negro volcano (Colombia-Ecuador) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 November-4 December 2018 (Continuing Activity)
Servicio Geológico Colombiano (SGC) reported that a seismic swarm below Cerro Negro de Mayasquer and Chiles volcanoes began at 0100 on 3 December. The events were classified as volcano-tectonic, with epicenters located up to 6 km from the summit of Chiles volcano, at depths of less than 8 km (4.7 km a.s.l.). The maximum local magnitude was 2.3. ... Read all
Sun, 24 May 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
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