USGS - Recent Volcano Activity

Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program
  1. AVO Great Sitkin ORANGE/WATCH - Unrest continues with continued lava effusion

    Jan 18, 2022 21:25 - Lava effusion continues at Great Sitkin. Satellite imagery shows continued growth of the lava flow field, and seismicity remains above background over the past 24 hours. Clouds obscured web camera observations of the volcano in the past day. It remains possible that explosive activity could occur with little or no warning. Great Sitkin is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.
  2. AVO Pavlof ORANGE/WATCH - Low-level eruption continues. Elevated surface temperatures observed in satellite data.

    Jan 18, 2022 21:25 - Low-level eruptive activity continues at Pavlof Volcano. Elevated surface temperatures were observed in satellite images over the past day. Seismicity remains elevated with ongoing periods of tremor. No explosions or ash emissions were detected. Small explosions accompanied by low-level ash emissions could happen at any time, and are typically a hazard in the immediate vicinity of the summit. The level of unrest at Pavlof can change quickly and the progression to more significant eruptive activity can occur with little or no warning. Pavlof is monitored by local ...
  3. AVO Semisopochnoi ORANGE/WATCH - Unrest continues. Seismic activity remains elevated

    Jan 18, 2022 21:25 - Low-level eruptive activity continues at Semisopochnoi from the North Cerberus cone. Seismicity remains elevated. Clouds obscured satellite and web camera views of the volcano over the last day. No explosions or ash emissions were detected. Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft above sea level have characterized the recent activity. Small explosions and associated ash emissions may continue and could be difficult to detect, especially when thick cloud cover ...
  4. HVO Kilauea ORANGE/WATCH - The eruption at Kīlauea summit remains paused. All recent lava activity has been confined ...

    Jan 18, 2022 19:37 - Activity Summary: The summit eruption of Kīlauea Volcano, within Halemaʻumaʻu crater, remains paused. All recent lava activity has been confined to the crater, and there are no indications of activity migrating elsewhere on Kīlauea. Summit Observations: Kīlaueaʻs summit began re-inflating at about 6:00 p.m. yesterday. At the current rate of inflation, it is possible that the eruption could restart within the next 24-48 hours. Tremor levels remain low at this time. The most recent sulfur dioxide (SO2) emission rate of approximately 300 tonnes per day (t/d) was ...
  5. CALVO GREEN/NORMAL - CA volcanoes at normal background levels of seismicity and deformation during past week.

    Jan 18, 2022 19:00 - Monitored CALIFORNIA VOLCANOES Current Volcano Alert Level: all NORMAL Current Aviation Color Code: all GREEN Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes. Observations for January 10, 2022 (0000h PST) through January 17, 2022 (2359h PST): Clear Lake ...

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