Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 15 July 2020 – 21 July 2020

Agung | Bali (Indonesia) : PVMBG reported that the last eruption at Agung was recorded at 0138 on 13 June 2019. Over the past year seismicity had generally decreased; volcanic earthquakes continued to be recorded but at a low occurrence rate. Deformation data indicated a deflationary pattern which had stabilized in recent months. A thermal anomaly was last visible in satellite data in October 2019 and did not reappear. White plumes were visible rising 20-150 m above the summit during 1 January-16 July. PVMBG lowered the Alert Level at Agung to 2 (on a scale of 1-4) on 16 July, stating that the public should not enter an exclusion zone set at a 2-km radius.

Copahue | Central Chile-Argentina border : SERNAGEOMIN reported that an ash plume from Copahue was visible on 16 July. The Alert Level remained at Green (the lowest level on a four-colour scale) and the public was reminded to stay 500 m away from El Agrio crater.

Dukono | Halmahera (Indonesia) : Based on information from PVMBG and satellite data the Darwin VAAC reported that ash plumes from Dukono rose to 2.1-2.3 km (7,000-8,000 ft) a.s.l. and drifted NW and W during 15-21 July. The Alert Level remained at a 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 15-16 July that sent ash plumes up to 3.6 km (11,800 ft) a.s.l. Ash plumes drifted SE, causing ashfall in Severo-Kurilsk on 15 July. A thermal anomaly over the volcano was identified in satellite images on those same days. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ibu | Halmahera (Indonesia) : PVMBG reported that during 15-20 July white and gray plumes with variable densities rose 200-800 m above Ibu’s summit and drifted in multiple directions; weather conditions prevented visual observations on 17 July. 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 : RVO reported minor eruptive activity at Kadovar during 1-15 July consisting of occasional light gray ash plumes of variable densities rising a few hundred meters above the summit crater. Fluctuating summit incandescence was visible at night. Activity intensified on 5 July as emissions became dark gray and dense. Explosions at 1652 and 1815 generated dense dark gray ash plumes that rose 1 km and drifted W. Loud rumbling accompanied the explosion. Activity subsided later that day but was again more intense during 8-10 July. Explosions recorded at 2045 on 8 July, 1145 and 1400 on 9 July, and at 0950 and 1125 on 10 July produced ash plumes that rose 1 km above the summit.

Karymsky | Eastern Kamchatka (Russia) : KVERT reported that a thermal anomaly over Karymsky was identified in satellite images on 13 and 15 July. A gas-and-steam plume containing some ash drifted 26 km SW on 14 July. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Semeru | Eastern Java (Indonesia) : PVMBG reported that ash plumes from Semeru rose 500 m above the summit and drifted N during 16-17 July. Weather conditions prevented visual observations during 15 and 18-21 July. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 10-17 July. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Stromboli | Aeolian Islands (Italy) : INGV reported that during 13-19 July activity at Stromboli was characterized by ongoing explosive activity from two vents in Area N (north crater area) and four vents in Area C-S (south-central crater area). Explosions at the N1 vent in Area N sometimes ejected tephra 200 m high, and ejected lapilli and bombs radially. Low-intensity explosions at vent N2 ejected tephra 80 m high. Explosions at the S1 and S2 vents in Area C-S ejected tephra. A vent between S2 and C (Area C-S) was noted on 18 July and produced occasional explosions. A sequence of high-energy explosions began at 0500 on 19 July and ended at 0504. The first explosion originated at the central vent in Area C-S but within a few seconds involved all Area C-S vents. An ash plume rose as high as 1 km. Tephra was ejected radially; some material was deposited along the Sciara del Fuoco and reached the coast within about 40 seconds after the beginning of the event. Tephra fell in the towns of Liscione and Roccette. The event damaged the infrared camera at Pizzo (400 m elevation).

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that nighttime incandescence at Suwanosejima’s Ontake Crater was occasionally visible during 10-17 July. Occasional eruptive events were recorded along with three explosions. One of them, recorded at 1630 on 12 July, generated a gray-white plume that rose as high as 1.5 km above the crater rim and entered a weather cloud. An explosion at 2006 on 15 July ejected large rocks as far as 300 m from the crater. The Alert Level remained at 2 (on a 5-level scale).

Yasur  | Vanuatu : Based on webcam images and satellite data the Wellington VAAC reported that on 19 July ash plumes from Yasur rose to 1.5 km (5,000 ft) a.s.l. Diffuse ash plumes rose to 1.2 km (4,000 ft) a.s.l. and drifted NNE.

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