Chiles-Cerro Negro volcano (Colombia-Ecuador) - Smithsonian / USGS Weekly Volcanic Activity Report for 15 June-21 June 2022 (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 monitor the Cerro Negro de Mayasquer and Chiles volcanoes, called the Chiles-Cerro Negro volcanic complex (CCNVC), and both issued reports on recent increased seismicity that began in May. Earthquakes were first felt on 12 June by residents near the border of Colombia and Ecuador, in the indigenous reservations of Chiles, Panán, and Mayasquer (Colombia), and in Tufiño (Ecuador). Seismicity continued, and from 0205 on 12 June to 0832 on 14 June there were 260 events clustered in two zones, in the S part of CCNVC (at depths of less than 6 km below the CCNVC summit) and about 9 km SE beneath Caldera de Potrerillos (at depths of 7-9 km).
Wed, 22 Jun 2022, 16:5916:59 PM | BY: VN
The earthquake swarm activity was similar to other swarms recorded since 2013.
A trend of inflation at a rate of approximately 28 mm/year has been recorded since 2016 (the beginning of deformation monitoring) through the end of 2020, when the deformation stabilized. Neither inflation nor deflation was detected during the beginning of 2020 or in 2021. Inflation was again detected in March and was continuing at a rate of 32 mm/year.
Data from hydrothermal sites around CCNVC showed variations from previous measurements in gas data, and conductivity, temperature, pH, and morphology of a few of the hot spring locations, though they were a result of changes to the hydrothermal systems and not increased volcanic activity.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Servicio Geológico Colombiano (SGC)
From: Global Volcanism Program, 2022. Report on Chiles-Cerro Negro. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 15 June-21 June 2022. Smithsonian Institution and US Geological Survey.
Wed, 15 Jun 2022, 17:06
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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