Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 4 March 2020 – 10 March 2020

San Miguel | El Salvador : SNET stated that during 28 February-6 March there were no reports of noises or gas emissions at San Miguel from the network of local observers. Seismicity was stable; 50-60 low-magnitude earthquakes were recorded per hour with RSAM values between 40 and 98 units, lower than the normal values of 150. The sulfur dioxide emission flux was 517-808 tons per day.

Sangay | Ecuador : IG reported a high level of activity at Sangay during 3-10 March. Ash plumes rose 870-1,130 m above the summit and drifted NW and W based on Washington VAAC notices. Incandescent blocks rolled down the SW flank during 3-4 March. A seismic station recorded a lahar on 8 March.

Semeru | Eastern Java (Indonesia) : BNPB and PVMBG reported that on 3 March a pyroclastic flow was generated from collapsing material at the end of a 750-m-long lava flow on Semeru’s S flank. The pyroclastic flow lasted nine minutes based on seismic data, traveled as far as 2.3 km down the S flank, and was documented and reported at 1733 by the Malang Subagyo district Badan Penanggulangan Bencana Daerah (BPBD). During 3-8 March black-gray eruptive plumes rose 200 m above the summit, interspersed with 100-m-high white gas plumes. Incandescent material was ejected 10-50 m above the summit; lava flows 500-1,000 m long continued to be active in the Kembar, Bang, and Kobokan drainages (on the S flank). The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

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