Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 16 September 2020 – 22 September 2020

Aira | Kyushu (Japan) : JMA reported that very small eruptive events at Minamidake Crater (at Aira Caldera’s Sakurajima volcano) were occasionally recorded during 14-21 September. Crater incandescence was visible at night. An eruption at 0810 on 15 September generated an ash plume that rose 1 km above the crater rim. The Alert Level remained at 3 (on a 5-level scale).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 17-22 September ash plumes from Dukono rose 2.1 km (7,000 ft) a.s.l. and drifted SW, W, NW, and N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 11 and 14-17 September that sent ash plumes up to 3 km (10,000 ft) a.s.l. and drifted SE, E, N, and NW. A thermal anomaly over the volcano was visible in satellite data on 13 and 15 September. Ash fell in Severo-Kurilsk during 14-15 September. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Etna | Sicily (Italy) : INGV reported that during 14-20 September activity at Etna’s New Southeast Crater (NSEC) was characterized by Strombolian activity and ash emissions. The ejection of incandescent material onto the crater rim and the S flank was occasionally visible during phases of increased activity. Minor ash emissions sporadically rose from Voragine Crater (VOR). Strombolian activity also occurred within Northeast Crater (NEC).

Fuego | Guatemala : INSIVUMEH reported that effusive activity at Fuego decreased as of 16 September; the lava flow that had descended the Ceniza drainage (SSW) was no longer active. There were 6-16 explosions per hour recorded during 16-22 September, generating ash plumes as high as 1.1 km above the crater rim that generally drifted 7-20 km in multiple directions. Shock waves rattled buildings within a 20-km radius. Sometimes incandescent material ejected 100-300 m high caused avalanches of blocks in the Ceniza, Seca (W), Trinidad (S), Taniluyá (SW), Las Lajas, and Honda drainages; avalanches sometimes reached vegetated areas. Ashfall was reported daily in several areas downwind including Morelia (9 km SW), Panimaché I and II (8 km SW), Finca Palo Verde, Santa Sofía (12 km SW), San Pedro Yepocapa (8 km NW), and Sangre de Cristo (8 km WSW). During 18-19 September lahars descended the Ceniza, Las Lajas, and Honda drainages, carrying tree branches, trunks, and blocks as large as 1.5 m in diameter. Additionally, lava flows traveled 200-350 m down the Seca and Ceniza drainages.

Ibu | Halmahera (Indonesia) : PVMBG reported that during 15-22 September white-and-gray ash plumes rose 200-800 m above Ibu’s summit and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Kadovar | Papua New Guinea : Based on satellite data, the Darwin VAAC reported that during 21-22 September ash plumes from Kadovar rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted NW.

Nevados de Chillan | Chile : On 22 September SERNAGEOMIN reported that lava continued to advance down Nevados de Chillán’s NNE flank. Gas emissions and occasional explosions were also recorded. The Alert Level remained at Yellow, the second lowest level on a four-colour scale, and residents were reminded not to approach the crater within 3 km. ONEMI stated that Alert Level Yellow (the middle level on a three-colour scale) remained in place for the communities of Pinto and Coihueco, noting that as of 16 June the public should stay at least 3 km away from the crater on the SW flank and 5 km away on the NE flank.

Popocatepetl | Mexico : CENAPRED reported that each day during 16-21 September there were 52-121 steam-and-gas emissions from Popocatépetl, most of which contained minor amounts of ash. Weather clouds often obscured views of the volcano. The Alert Level remained at Yellow, Phase Two (middle level on a three-colour scale).

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported that small, frequent eruptions at Rincón de la Vieja continued to be recorded, though sometimes not visually confirmed, during 16-22 September. A larger event, at 1053 on 22 September, ejected material out of the crater and into the drainages on the N flank.

Semeru | Eastern Java (Indonesia) : According to PVMBG ground-based observers noted ash plumes from Semeru rising 500 m above the summit and drifting SE on 17 September. An ash plume rose 200 m and drifted N the next day. The Alert Level remained at 2 (on a scale of 1-4).

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 11, 13-14, and 16-17 September; weather clouds prevented views on other days during 11-18 September. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Suwanosejima | Ryukyu Islands (Japan) : JMA reported nighttime incandescence at Suwanosejima’s Ontake Crater during 11-18 September. An explosion at 0155 on 15 September generated an ash plume that rose 1.5 km above the crater rim and ejected large rocks as far as 400 m from the crater. The Alert Level remained at 2 (on a 5-level scale).

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