USGS - Recent Volcano Activity

Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program
  1. AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava continues

    Aug 12, 2022 23:01 - Slow eruption of lava from the summit crater of Great Sitkin Volcano continued this week. Satellite-based radar observations showed thickening of the lava flow around the vent but no significant changes in the lava flow area or length. Weakly elevated surface temperatures were observed at the summit in satellite data on days when the volcano was not obscured by clouds. Seismic activity remains low with occasional small local earthquakes detected throughout the week.  The terrain is steep near the terminus of the lava flow lobes, and blocks of lava could ...
  2. AVO Cleveland YELLOW/ADVISORY - Unrest continues with elevated surface temperatures observed in satellite images.

    Aug 12, 2022 23:01 - Unrest continues at Cleveland volcano. Elevated surface temperatures were observed in satellite data over the past week when the volcano was not obscured by clouds.  Two seismic stations near the volcano experienced an outage on August 2 but the nearest station was restored on August 5.  Small local earthquakes were detected by this station on August 6 and August 9.  Episodes of lava eruption and explosions can occur at Cleveland without advance warning. Explosions are normally short duration and only present a hazard to aviation in the immediate ...
  3. AVO Pavlof ORANGE/WATCH - Weak explosions detected, with minor ash emissions likely but not observed

    Aug 12, 2022 23:01 - Pavlof Volcano continues to erupt from the active vent just below the summit on its east flank. Seismic tremor and numerous minor explosions were observed each day last week in seismic and infrasound data.  Elevated surface temperatures were observed in satellite data early in the week and August 12 but the volcano was obscured by clouds from August 9 through August 11.  Clear webcam views from August 6 and August 7 showed no ash emissions.  It is likely, however, that the small explosions detected in geophysical data were accompanied by minor ash emissions ...
  4. AVO Semisopochnoi YELLOW/ADVISORY - Unrest continues with steam emissions observed in webcam images.

    Aug 12, 2022 23:01 - Low-level unrest continues at Semisopochnoi volcano. Steam emissions were observed from the north crater of Mount Cerberus in webcam images when the volcano was not obscured by clouds.  Occasional small earthquakes were observed in seismic data but no seismic tremor or explosions were detected last week. 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 (3 km) above sea level have characterized the recent activity and could begin again with little ...
  5. CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.

    Aug 12, 2022 20:39 - Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of activity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon. Recent Observations: Over the past week there were located earthquakes at Mount St. Helens, Mount Rainier, Mount Baker, and Mount Hood, consistent with background levels of seismicity at each volcano. Field crews worked at Three Sisters and ...

Please publish modules in offcanvas position.