Roundup of Global Volcanic Activity – New – Activity for the week of 23 November-29 November 2016
Sabancaya | Peru : The Technical and Scientific Committee for volcanic risk management of the Arequipa region (comprised of five groups including IGP’s OVS and INGEMMET’s OVI) reported 288 explosions at Sabancaya during 21-27 November. Ash plumes rose as high as 4.5 km above the crater rim and drifted 35-40 km E and SE. Sulfur dioxide emissions were as high as 3,300 tonnes/day and deformation was detected on the SE flank. During 28-29 November ash plumes rose 2 km and drifted 30 km S and SE. The Alert level remained at Yellow; the public was warned to stay at least 10 km away from the volcano.
Rotorua | North Island (New Zealand) : GeoNet reported a small hydrothermal eruption in Lake Rotorua on 28 November, and noted that the occurrence was not unusual. In a news article residents described a geyser that rose 20-30 m above the lake surface. A GNS scientists noted that the last significant steam eruptions in Rotorua occurred about 15 years ago.
Copahue | Central Chile-Argentina border : Based on satellite and webcam images, the Buenos Aires VAAC reported that during 23-25 and 27-29 November diffuse steam-and-ash plumes rose from Copahue to altitudes of 3.3-5.2 km (11,000-17,000 ft) a.s.l. and drifted SW, SE, and N. The Alert Level remained at Yellow; SERNAGEOMIN recommended no entry into a restricted area within 1.5 km of the crater.
Chirinkotan | Kuril Islands (Russia) : SVERT reported that on 29 November an ash plume rose from Chirinkotan was visible in satellite images rising to an altitude of 8.8 km (29,000 ft) a.s.l. and drifting 39 km N. The Aviation Color Code was raised to Yellow (on a four-color scale).