Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 5 August 2020 – 11 August 2020

Manam | Papua New Guinea : The Darwin VAAC reported that on 6 August an ash plume from Manam rose to 3 km (10,000 ft) a.s.l. and drifted SW. The next day ash plumes rose to 2.1 km (7,000 ft) a.s.l. and drifted W.

Nishinoshima | Japan : Based on satellite data, the Tokyo VAAC reported that during 5-11 August ash plumes from Nishinoshima rose to 4-4.9 km (13,000-16,000 ft) a.s.l. and drifted in multiple directions.

Raung | Eastern Java (Indonesia) : PVMBG reported that an eruptive event at Raung was detected on 1 August, though weather conditions prevented visual confirmation. Weather conditions continued to obscure of views of the volcano during 5-11 August; white plumes were visible rising 100-200 m above the summit during some of the breaks in cloud cover. 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.

Sinabung | Indonesia : PVMBG reported that at 0158 on 8 August a phreatic eruption at Sinabung produced a brown-gray ash plume that rose 2 km above the summit and drifted E and SE. A news article stated that ashfall impacted at least four districts, including Naman Teran, Merdeka, Berastagi, and Dolat Rayat. BNPB noted that clean water was distributed, and emergency vehicles were deployed to clean up the ashfall. Later that day at 1718 an ash plume rose at least 1 km above the summit and drifted ESE. There is a general exclusion zone set at 3 km from the summit, with extensions to 5 km on the SE and 4 km on the NE. A news article noted that authorities began enforcing a 7-km exclusion zone. An eruptive event at 1016 on 10 August produced a dense gray ash plume that rose at least 5 km above the summit (24,500 ft a.s.l.) and drifted NE and SE. Parts of the plume drifted down the flank; ashfall was reported in several areas downwind. The Darwin VAAC advisory stated that satellite observations showed ash plumes drifting WNW at 9.8 km (32,000 ft) a.s.l. at 1430 and ENE at 4.3 km (14,000 ft) a.s.l. at 1630. The Alert Level remained at 3 (on a scale of 1-4). Residents and tourists in Berastagi (13 km E) turned on headlights to navigate through the ash according to a news article.

Villarrica | Chile : POVI reported that small Strombolian explosions at Villarrica were visible in webcam images on 23 July. At 1522 on 7 August a long-period earthquake occurred along with a moderate explosion in the summit crater according to SERNAGEOMIN; a gray ash plume rose to 3.4 km (11,000 ft) a.s.l. (370 m above the vent) and drifted SE. The Alert Level remained at Yellow, the second lowest level on a four-colour scale. ONEMI maintained an Alert Level Yellow (the middle level on a three-colour scale) for the municipalities of Villarrica, Pucón (16 km N), Curarrehue, and the commune of Panguipulli, and the exclusion zone for the public of 500 m around the crater.

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