News and Updates on Volcanoes and Earthquakes

BPPTKG reported that the eruption at Merapi (on Java) continued during 12-18 April. Seismicity remained at high levels. The SW lava dome produced 111 lava avalanches that traveled as far as 1.7 km down the SW flank. ... Read all

PVMBG reported that eruptive activity at Marapi (on Sumatra) was ongoing during 17-22 April. White-and-gray ash plumes rose 250-300 m above the summit and drifted SE and W on 21 April. White steam-and-gas plumes rose 250-300 m above the summit and drifted in multiple directions on 17, 19, and 22 April. ... Read all

PVMBG reported that the eruption at Lewotolok continued during 17-23 April. White-and-gray ash plumes rose 100-600 m above the summit and drifted SE, W, and NW almost every day; white emissions rose 300-500 m above the summit and drifted W and NW during 19-20 April. The Alert Level remained at 3 (on a scale of 1-4) and the residents of Lamawolo, Lamatokan, and Jontona were warned to stay 2 km away from the vent and 3 km away from the vent on the S and SE flanks. ... Read all

PVMBG reported that during 17-18 and 20-22 April white steam-and-gas plumes rose as high as 100 m above the summit of Lewotobi's Laki-laki volcano and drifted N, NE, and E. On 23 April a white-and-gray ash plume rose 100-200 m and drifted SW and W. The Alert Level remained at 2 (the second lowest level on a scale of 1-4) and the public was warned to stay outside of the exclusion zone, defined as a 2-km radius around Laki-laki crater, 3 km to the NNE, and 5 km on the NE flanks. ... Read all

Satellite data showed an area of yellowish-green discolored water that was about 5 km long in the N-S direction and about 3 km in the E-W direction, in the vicinity of the submarine Lateiki volcano on 21 April. A more diffuse plume of discolored water extended another ~12 km WNW before dissipating. ... Read all

On 19 April PVMBG lowered the Alert Level for Krakatau to 2 (on a scale of 1-4) based on visual observations and instrumental data. The public was warned to stay at least 2 km away from the crater. ... Read all

Satellite data showed an area of yellow-green discolored water that was about 4.2 km in diameter in the vicinity of the submarine Kavachi volcano on 19 April. A more diffuse plume of discolored water extended another ~11 km NE before dissipating. ... Read all

PVMBG reported that Ibu continued to erupt during 17-23 April. White-and-gray ash plumes rose 200-2,500 m above the summit and drifted in multiple directions on 17 and 21 April. White steam-and-gas plumes rose 200-600 m above the summit and drifted in multiple directions on the other days. ... Read all

AVO reported that slow lava effusion continued in Great Sitkin's summit crater during 17-23 April. Slightly elevated surface temperatures were identified in satellite images during 17-18 April. Seismicity was low with a few small daily earthquakes recorded by the seismic network. ... Read all

Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption at Fernandina continued during 16-23 April. Daily thermal anomalies were identified in satellite images. Sulfur dioxide emissions, measured using satellite data, fluctuated between about 207 and 1,418 tons per day. ... Read all