Volcanos

Roundup of Global Volcanic Activity

Kliuchevskoi (Kamchatka): The effusive-explosive eruption of the volcano continues with little changes. The lava flow remains active on the upper eastern flank while explosive activity in the summit crater and associated ash emissions have been more intermittent. A collapse of parts of the lava flow generated a pyroclastic flow that descended the Apakhonchic ravine on 17 July.

Alaid (Northern Kuriles): The thermal signal from the volcano detected via satellite data has become much weaker since its peak in the first week of July, when volcanic activity could be identified as new lava flows inside the summit caldera. This decrease suggests that the eruption (lava effusion) has either ended, or paused, or continues with greatly reduced strength only.

Nevados de Chillán (Central Chile): The volcano has been very calm during the past weeks, but now began again to emit occasional small ash puffs and pulsating gas emissions. In its latest bulletin, SERNAGEOMIN reported that no significant variations in monitoring parameters had been detected overall during the past 2 weeks, except a weak increase in SO2 output and the occurrence of (more than 700 in total) long-period earthquakes related to internal fluid movements.

Bristol Island (United Kingdom, South Sandwich Is): The eruption on the remote island continues. Recent satellite images show increased ash emissions as well as two dark stripes that likely are newly erupted lava flows to the west and northwest from Mount Sourabaya volcano.