Live Panorama of Kīlauea Caldera from HVO Observation Tower

  • AVO Semisopochnoi YELLOW/ADVISORY - Unrest continues; satellite data obscured by clouds. Seismicity is low.
    on January 1, 1970 at 12:00 am

    Sep 22, 2019 18:58 - No significant activity was observed in the seismic data. No explosions were detected in regional infrasound data. Satellite observations were obscured by clouds over the past day. Semisopochnoi is monitored with an on-island seismic network and remotely by satellite and lightning sensors. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.

  • AVO Cleveland YELLOW/ADVISORY - Unrest continues. Seismicity low.
    on January 1, 1970 at 12:00 am

    Sep 22, 2019 18:58 - Unrest continues. Satellite and web camera views were obscured by clouds over the past day. Local seismic data show no new activity. No activity observed in local or infrasound arrays during the last 24 hours. Episodes of lava effusion and explosions can occur without advance warning. Explosions from Cleveland are normally short duration and only present a hazard to aviation in the immediate vicinity of the volcano. Larger explosions that present a more widespread hazard to aviation are possible, but are less likely and occur less frequently. Cleveland volcano is ...

  • AVO Shishaldin ORANGE/WATCH - Low-level eruption continues;
    on January 1, 1970 at 12:00 am

    Sep 22, 2019 18:58 - Low-level eruptive activity continues at Shishaldin volcano. Seismicity remains elevated with tremor detected over the past day. No unusual activity observed in partly cloudy satellite and web camera views over the past day. Shishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.

  • CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
    on January 1, 1970 at 12:00 am

    Sep 20, 2019 16:56 - 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: A few small earthquakes were recorded at Mount Rainier, Mount St. Helens and Newberry Volcano over the past week. All monitoring systems show that activity at these and the rest of the Cascade Range volcanoes remained at background ...

  • HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Seismicity above background; continued summit inflation.
    on January 1, 1970 at 12:00 am

    Sep 19, 2019 20:08 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity have not changed significantly in the past week and persist above long-term background levels. Observations: During the past week, approximately 90 small-magnitude earthquakes (all smaller than M2.5) were detected beneath the upper elevations of Mauna Loa. Most of the earthquakes occurred at shallow to intermediate depths of less than 10 km (~6 miles) below ground level. Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) measurements show ...