Roundup of Global Volcanic Activity – New Activity for the week of 7 November – 13 November 2018

Mayon | Luzon (Philippines) : PHIVOLCS reported that at 1243 on 8 November and at 0739 on 12 November small, short-lived brownish ash plumes from Mayon, associated with a degassing events, drifted WSW and SW, respectively. There was no accompanying seismic or infrasound record from these events. On 11 November a volcanic earthquake was associated with a short-lived lava fountaining event at 0840. The event lasted for 36 seconds based on the seismic record and produced a brownish-gray ash plume that drifted SW. Crater incandescence was visible most nights during 7-13 November. The Alert Level remained at 2 (on a 0-5 scale) and PHIVOLCS reminded residents to stay away from the 6-km-radius Permanent Danger Zone and the 7-km Extended Danger Zone on the SSW and ENE flanks.

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that an explosion at Suwanosejima’s Ontake Crater was recorded at 0428 on 9 November. A plume could not be confirmed because weather clouds obscured views, but large pieces of pumice were observed being ejected 700 m S. Explosions had not been recorded since 2 June. The Alert Level remained at 2 (on a 5-level scale).


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