Volcanos

Roundup of Global Volcanic Activity

Bardarbunga (Central Iceland): The visible intensity of the eruption continues to decrease gradually. The Icelandic Met office conducted air-borne measurements of the lava field last week, showing that it has significantly thickened (rather than expanded laterally) during the past weeks, and is now estimated to contain approx. 1.4 cubic kilometers of lava. Effusion rates, although decreasing, are still close to an impressive 100 m³ per second.

Fogo (Cape Verde): The eruption still continues although most of the time visible activity is very low and restricted to degassing. Minor lava effusion and sporadic flares of strombolian activity of mild to moderate size occur from time to time. Scientists from the Cabo Verde volcano observatory (OVCV) who climbed the volcano on 25 January observed small ash emissions, and published a detailed report about the most recent significant activity during 20-23 January, when explosions produced a short-lived ash plume that rose up to 1200 meters on the morning of 20 Jan, as well as a small lava flow on the following day.

Kliuchevskoi (Kamchatka): The eruption continues and a lava flow is active on the southeastern upper flank. A collapse of lava from the flow and violent snow-lava interaction produced a pyroclastic flow that descended to the base of the steep mountain yesterday afternoon around 17:40 local time. From webcam images, it can be estimated that the flow traveled approx 2000 meters in about 2 minutes, resulting in a mean velocity of around 16 meters per second.

Karymsky (Kamchatka): Moderate explosive activity continues. Ash plumes from strombolian to vulcanian eruptions were reported by KVERT, reaching approx. 14,000 ft (4.2 km) altitude and drifting north and later east from the volcano. Aviation color code remains "orange".

Shishaldin (United States, Aleutian Islands): A faint thermal signal remains visible on satellite imagery. According to the Alaska Volcano Observatory, weak eruptive activity likely continues in the summit crater.

San Miguel (El Salvador): A small explosion occurred last Monday at 06:43 morning. Probably phreatic in nature, it was the first eruptive activity since minor ash emissions past July. According to MARN, falling blocks from the eruption could be heard from people in the vicinity of the volcano. No further eruptions have followed so far, and no significant temperature signal can be detected at the summit, only constant degassing reaching 150-250 m height. Seismic activity remains relatively low, but sudden explosions of small to moderate size remain a possibility.

Sangay (Ecuador): Eruptive activity of some sort is likely in progress at the volcano. Along with pilot reports of spotted plumes relayed through the Washington VAAC, thermal signals detectable on satellite data have been more and more frequent since early January, Culture Volcan points out in his blog. It is unknown what kind of activity is occurring, but the most likely scenario is mild to moderate strombolian activity, which is typical for Sangay,- an extremely remote, but at the same time very active, that often has this type of activity. In many ways it is similar to its Kamchatka counterpart Klyuchevskoy currently in eruption as well.