USGS - Recent Volcano Activity

Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program
  1. AVO Shishaldin UNASSIGNED/UNASSIGNED - Prolonged data outage; Alert Levels to UNASSIGNED/UNASSIGNED

    Oct 20, 2021 23:09 - The Shishaldin Volcano monitoring network has several outages affecting local GPS, seismic, and infrasound stations that are likely to persist through the winter months. Due to the impaired local monitoring stations, the Alaska Volcano Observatory is changing the Aviation Color Code and the Volcano Alert Level to UNASSIGNED/UNASSIGNED. The Alaska Volcano Observatory continues to monitor Shishaldin with seismic, GPS, and infrasound instruments on nearby networks, as well as with Cold Bay web camera imagery and satellite data.
  2. AVO Cleveland UNASSIGNED/UNASSIGNED - Decline in seismic unrest, deformation, and thermal emissions; Alert levels to ...

    Oct 20, 2021 23:04 - A sustained decline in volcanic unrest at Cleveland volcano over the past few months has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW/ADVISORY to UNASSIGNED/UNASSIGNED. Elevated seismicity, deformation within the summit crater, and thermal and gas emissions prompted raising the Aviation Color Code and Volcano Alert Level from UNASSIGNED/UNASSIGNED to YELLOW/ADVISORY on March 20, 2021. This activity continued over the summer, but all signs of unrest have ceased or declined in recent months. Elevated ...
  3. HVO Kilauea ORANGE/WATCH - Kīlauea volcano is erupting; all lava activity is confined within Halemaʻumaʻu, in ...

    Oct 20, 2021 20:11 - Activity Summary:  Kīlauea volcano is erupting. As of this morning, October 20, 2021, lava continues to erupt from a single vent in the western wall of Halemaʻumaʻu crater. All lava activity is confined within Halemaʻumaʻu crater in Hawai‘i Volcanoes National Park. Seismicity and volcanic gas emission rates remain elevated. Summit Observations: Sulfur dioxide (SO2) emission rates remain high, with a preliminary emission rate for October 17, 2021, of approximately 2,700 tonnes per day. No significant changes seen in summit tilt or GPS observations; summit tilt ...
  4. AVO Great Sitkin ORANGE/WATCH - Data outage; lava effusion likely continues

    Oct 20, 2021 20:02 - An ongoing data outage is affecting geophysical and web camera data streams. Clouds obscured satellite images of the volcano over the past day, but lava effusion likely continues. There is no indication of how long lava effusion will continue during the current eruption, and it is possible that explosive activity could occur with little or no warning. Great Sitkin Volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.
  5. AVO Pavlof ORANGE/WATCH - Elevated seismicity and small explosions detected in geophysical data

    Oct 20, 2021 20:02 - Seismicity remains elevated, with tremor and small explosions detected over the past day. Clouds have obscured satellite and web cameras views, but these explosions likely produced low-level ash emissions. 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 Volcano is monitored by local seismic and infrasound sensors, ...

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