Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the week of 18 October - 24 October 2017

Aira | Kyushu (Japan) : JMA reported that a very small event at Showa Crater (at Aira Caldera’s Sakurajima volcano) was detected on 17 October. The Alert Level remained at 3 (on a 5-level scale).

Cleveland | Chuginadak Island (USA) : AVO reported that the lava dome in Cleveland's summit crater continued to grow, and by 15 October it covered an area of about 9,500 square meters with dimensions of 125 x 100 m. No significant change in the size of the dome was identified in satellite data from 15 to 19 October. During 16 and 21-23 October satellite data showed moderately elevated surface temperatures and a small steam plume was visible in web camera images. The Aviation colour Code remained at Orange and the Volcano Alert Level remained at Watch.

Dukono | Halmahera (Indonesia) : Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 19-20 and 22-23 October ash plumes from Dukono rose to altitudes of 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted NNE, NE, and E.

Ebeko | Paramushir Island (Russia) : Based on observations by volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions during 13-20 October generated ash plumes that rose as high as 2.5 km (8,200 ft) a.s.l. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Karymsky | Eastern Kamchatka (Russia) : On 19 October KVERT reported that gas-and-steam activity at Karymsky continued, and that quiet or cloudy conditions had been observed in satellite data since 3 October. The Aviation colour Code was lowered to Yellow (the second highest level on a four-colour scale).

Kilauea | Hawaiian Islands (USA) : During 18-24 October HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea’s Overlook crater. Webcams recorded incandescence from long-active sources within Pu'u 'O'o Crater and from a small lava pond in a pit on the W side of the crater. The 61G lava flow, originating from a vent on Pu'u 'O'o Crater's E flank, continued to enter the ocean at Kamokuna. Surface lava flows were active above the pali and on the coastal plain.

Langila | New Britain (Papua New Guinea) : Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that during 17-18 and 20 October ash plumes from Langila rose 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted S, W, and NW.

Sabancaya | Peru : Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya slightly increased compared to the previous week; there was an average of 47 explosions recorded per day during 16-22 October. Seismicity was dominated by long-period events, with an increase in signals indicating emissions and a low number of hybrid events. Gas-and-ash plumes rose 3.8 km above the crater rim and drifted 60 km NE, E, and SE. The MIROVA system detected four thermal anomalies. The report warned the public not to approach the crater within a 12-km radius.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a plume comprised of re-suspended ash drifted about 230 km SE from the vicinity of the Sheveluch on 13 October. A thermal anomaly was identified in satellite images during 15-19 October. The Aviation colour Code remained at Orange.

Sinabung | Indonesia : Based on observations by PVMBG, webcam and satellite images, and model data, the Darwin VAAC reported that during 17-18 and 21-23 October ash plumes from Sinabung rose 2.4-4.6 km (8,000-15,000 ft) a.s.l. and drifted in multiple directions.

Turrialba | Costa Rica : OVSICORI-UNA reported that an event at Turrialba at 0825 on 20 October generated an ash plume that rose 300 m above the crater rim and drifted NW.