Actualités et mises à jour sur volcans et séismes

The Kamchatkan Volcanic Eruption Response Team (KVERT) reported that lava extrusion may have continued at Sheveluch's “300 years of RAS” dome on the SW flank of Old Sheveluch and at the Young Sheveluch dome during 17-24 April. Thermal anomalies over the domes were identified in satellite images during 20-21 April; weather clouds obscured views on the other days. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). ... Tout lire

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity continued at Semeru during 23-29 April, with multiple daily eruptive events recorded by the seismic network. White-and-gray ash plumes rose 300-900 m above the summit and drifted in multiple directions. Incandescence at the summit was visible in 24 and 26 April webcam images. ... Tout lire

The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported high levels of eruptive activity at Sangay during 21-29 April. The seismic network recorded 124-258 daily explosions. Several ash-and-gas plumes were observed rising more than 4 km above the summit during 22-24 April, as high as 3 km above the summit during 24-25 April, and up to 1.7 km above the summit during the rest of the week; weather clouds sometimes obscured views during the last half of the week and almost completely obscured views during 21-22 and 26-27 April. ... Tout lire

The Servicio Geológico Colombiano's (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that eruptive activity at Nevado del Ruiz continued during 22-28 April. Seismic data indicated that events associated with fluid movement increased in both number and intensity compared to the previous week. Some of the seismic events were associated with pulsating ash emissions; webcam images confirmed these ash emissions, including some with higher-temperature ejecta. ... Tout lire

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity from Verbeek Crater at Marapi (on Sumatra) continued during 23-29 April. Dense gray ash plumes rose 350-1,000 m above the summit and drifted N during 25 and 27-28 April. Two more eruptive events were recorded on 28 April but not visually observed due to weather conditions. ... Tout lire