Live Panorama of Kīlauea Caldera from HVO Observation Tower

  • HVO Kilauea GREEN/NORMAL - Low activity levels; no lava at the surface, slow inflation of summit and middle ERZ.
    on January 1, 1970 at 12:00 am

    Jul 16, 2019 22:37 - Activity Summary: Kīlauea Volcano is not erupting. Monitoring data continue to show steady rates of seismicity and ground deformation, low rates of sulfur dioxide emission, and only minor geologic changes since the end of eruptive activity in September 2018. As of June 25, Kīlauea Volcano has been at NORMAL/GREEN. For definitions of USGS Volcano Alert Levels and Aviation Color Codes, see: https://volcanoes.usgs.gov/vhp/about_alerts.html. PLEASE NOTE: Reflecting the current Kilauea Volcano Alert Level, HVO will transition from weekly to monthly text updates for ... […]

  • AVO Shishaldin YELLOW/ADVISORY - Seismic tremor ongoing; no eruptive activity observed in the past day.
    on January 1, 1970 at 12:00 am

    Jul 16, 2019 19:51 - Seismic tremor has continued over the last 24 hours. No eruptive activity was detected in infrasound data and and cloudy conditions obscured satellite and web camera views of the volcano. Shishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. […]

  • AVO Cleveland YELLOW/ADVISORY - No eruptive activity observed in satellite or seismic data in the past day.
    on January 1, 1970 at 12:00 am

    Jul 16, 2019 19:51 - Weakly elevated surface temperatures were observed at the summit of the volcano in partly clear satellite views over the last 24 hours. No activity was detected in regional seismic or infrasound data. Additional episodes of lava effusion and explosions are likely and will 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 ... […]

  • AVO Semisopochnoi YELLOW/ADVISORY - Seismic tremor ongoing; no eruptive activity observed in the past day.
    on January 1, 1970 at 12:00 am

    Jul 16, 2019 19:51 - Seismic tremor, fluctuating between periods of continuous activity and discrete bursts, was observed over the last 24 hours. No eruptive activity was detected in infrasound data and cloudy conditions obscured satellite views of the volcano. Semisopochnoi is monitored with an on-island seismic network and remotely by satellite and lightning sensors. Furthermore, an infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit. […]

  • AVO Great Sitkin GREEN/NORMAL - Seismicity returned to background levels. Alert level downgraded to GREEN/NORMAL.
    on January 1, 1970 at 12:00 am

    Jul 15, 2019 19:39 - Seismic activity at Great Sitkin Volcano has decreased to background levels over the past few weeks. There is no evidence of eruptive activity in geophysical data streams or in satellite observations. Thus, AVO is decreasing the Aviation Color Code to GREEN and Alert Level to NORMAL. Great Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and ... […]