Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 11 March 2020 – 17 March 2020

Antillanca Volcanic Complex : On 11 March SERNAGEOMIN raised the Alert Level for the Antillanca Volcanic Complex to Yellow because of increased seismicity near Casablanca stratovolcano. Volcano-tectonic (VT) earthquakes began to be recorded in August 2019 and were located about 6.3 km NE of the stratovolcano. During 31 January-1 February a total of 131 VT events were located to the W and NW; the two largest events were M 3.1 and 3.2. A swarm of 73 VT events were detected on 9 March with epicenters located 2.4 km NNW and a maximum local magnitude of 1.8.

Kanlaon | Philippines : PHIVOLCS reported that ground-deformation data at Kanlaon indicated long-term slow inflation of the volcano since 2017, slow inflation of the lower flanks since May 2019, and notable inflation of the upper flanks beginning near the end of January 2020. The seismic network recorded a total of 80 volcanic earthquakes since 9 March; 77 of them were low-frequency events associated with magmatic fluids. The deformation and seismic data both indicated unrest; PHIVOLCS raised the Alert Level to 1 (on a scale of 0-5) on 11 March and reminded the public to remain outside of the 4-km-radius Permanent Danger Zone. During 12-17 March there were between two and eight volcanic earthquakes recorded daily.

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