Roundup of Global Volcanic Activity – Ongoing Activity for the week of 25 January-31 January 2017 – Cont.

Nevado del Ruiz | Colombia : Based on analysis of satellite images, the Washington VAAC reported that on 31 January an ash plume from Nevado del Ruiz rose to an altitude of 7 km (23,000 ft) a.s.l. and drifted W.

Popocatepetl | Mexico : Each day during 25-31 January CENAPRED reported 2-55 steam and gas emissions from Popocatépetl and crater incandescence at night. The Alert Level remained at Yellow, Phase Two.

Sabancaya | Peru : Based on webcam and satellite views, and seismic data, the Buenos Aires VAAC reported that sporadic gas-and-ash puffs rose from Sabancaya during 25-31 January. Weather clouds sometimes prevented visual observations. A field team from IGP’s Observatorio Vulcanológico del Sur (OVS) visited Sabancaya on 26 January and observed ash plumes from explosions rising about 2 km above the crater rim.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that during 20-27 January lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed a daily thermal anomaly over the dome. The Aviation Colour Code remained at Orange.

Sinabung | Indonesia : Based on PVMBG observations, Indonesian Met Office observations, satellite images, and wind data, the Darwin VAAC reported that during 27-30 January ash plumes from Sinabung rose 3.3-4.6 km (11,000-15,000 ft) a.s.l. and drifted SW and SSE.

Suwanosejima | Ryukyu Islands (Japan) : Based on JMA notices and satellite-image analyses, the Tokyo VAAC reported that on 26 January an ash plume from Suwanosejima rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted SE.

Turrialba | Costa Rica : Based on webcam views, the Washington VAAC reported ongoing ash emissions at Turrialba on 27 January.


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