Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - No activity seen in satellite or regional infrasound data; seismic network out

USGS Volcano Current Alerts - Fri, 11/16/2018 - 18:31
Nov 16, 2018 22:37 - No eruptive activity was observed in satellite imagery or regional infrasound over the past week. The satellite link that transmits seismic data from Semisopochnoi failed on November 1, but an infrasound array on Adak Island should still detect significant explosive emissions from Semisopochnoi (with a 13-minute delay) if atmospheric conditions permit. Planning is underway to visit Amchitka Island in order to make repairs to the satellite facility that transmits Semisopochnoi data, weather permitting. A return to eruptive activity remains a possibility at ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues; active lava flow; minor ash and steam emissions

USGS Volcano Current Alerts - Fri, 11/16/2018 - 18:31
Nov 16, 2018 22:37 - Low-level eruptive activity occurred at the intracaldera cone of Veniaminof volcano throughout the past week, indicated by relatively continuous seismic tremor, as well as by elevated surface temperatures, an eruption plume observed in satellite and web camera images, and occasional infrasound detections on equipment in Sand Point. The eruption is characterized by low-level lava spattering, a lava flow, and variable emissions of steam and volcanic ash. A pilot report today (Nov. 16) indicated that the plume was reaching up to altitudes of 16,000 ft. Recent satellite ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues; no explosive activity detected.

USGS Volcano Current Alerts - Thu, 11/15/2018 - 14:32
Nov 15, 2018 19:49 - Low-level unrest continues at Great Sitkin volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. No activity was observed in cloudy satellite images. Great Sitkin volcano 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 satellite data.
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; no activity observed in mostly cloudy satellite images.

USGS Volcano Current Alerts - Thu, 11/15/2018 - 14:32
Nov 15, 2018 19:49 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. Clouds obscured clear views of the summit region. Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. The web camera, one seismic station, and the local infrasound array are offline due ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - No activity seen in satellite data or regional infrasound; seismic data out

USGS Volcano Current Alerts - Thu, 11/15/2018 - 14:32
Nov 15, 2018 19:49 - No eruptive activity was observed in partially cloudy satellite imagery or regional infrasound over the past day. The satellite link that transmits seismic data from Semisopochnoi failed on November 1, but an infrasound array on Adak Island should still detect significant explosive emissions from Semisopochnoi (with a 13-minute delay) if atmospheric conditions permit. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, though this is currently off-line, and remotely by satellite and ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues; weak plume extends from summit to 48 km (30 miles) to northwest.

USGS Volcano Current Alerts - Thu, 11/15/2018 - 14:32
Nov 15, 2018 19:49 - Veniaminof volcano continues to erupt, with minor lava spattering, effusion of a lava flow from the cone in the ice-filled summit caldera, and continuous, low-amplitude seismic tremor. Clear satellite views of the volcano over the past day showed strongly elevated surface temperatures from the active lava effusion. Satellite data show a plume extending from the summit to the northwest for 48 km (30 miles). Satellite data indicates that the plume likely contains low concentrations of ash. Diffuse ash and steam emissions continue and trace ashfall is possible in nearby ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues; no explosive activity detected.

USGS Volcano Current Alerts - Wed, 11/14/2018 - 16:32
Nov 14, 2018 21:30 - Low-level unrest continues at Great Sitkin volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. No activity was observed in cloudy satellite images. Great Sitkin volcano 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 satellite data.
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; no activity observed in mostly cloudy satellite images.

USGS Volcano Current Alerts - Wed, 11/14/2018 - 16:32
Nov 14, 2018 21:30 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. Clouds obscured clear views of the summit region. Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. The web camera, one seismic station, and the local infrasound array are offline due ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - No activity seen in satellite data or regional infrasound; seismic data out

USGS Volcano Current Alerts - Wed, 11/14/2018 - 16:32
Nov 14, 2018 21:30 - No eruptive activity was observed in partially cloudy satellite imagery or regional infrasound over the past day. The satellite link that transmits seismic data from Semisopochnoi failed on November 1, but an infrasound array on Adak Island should still detect significant explosive emissions from Semisopochnoi (with a 13-minute delay) if atmospheric conditions permit. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, though this is currently off-line, and remotely by satellite and ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues; incandescence from summit effusion seen in webcam overnight.

USGS Volcano Current Alerts - Wed, 11/14/2018 - 16:32
Nov 14, 2018 21:30 - Veniaminof volcano continues to erupt, with minor lava spattering, effusion of a lava flow from the cone in the ice-filled summit caldera, and continuous, low-amplitude seismic tremor. Clear satellite views of the volcano over the past day showed strongly elevated surface temperatures from the active lava effusion. Webcam images showed incandescence from the summit overnight and a weak ash plume extending to the southwest today. Diffuse ash and steam emissions continue and trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof ...
Categories: Volcano Reports

HVO Kilauea YELLOW/ADVISORY - Low activity levels across the volcano, no lava at the surface.

USGS Volcano Current Alerts - Tue, 11/13/2018 - 20:31
Nov 13, 2018 23:37 - Activity Summary: Kīlauea Volcano is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week. Deformation signals are consistent with refilling of the middle East Rift Zone. Observations: HVO monitoring during the past week shows low rates of seismicity at the summit and East Rift Zone (ERZ). Earthquakes continue to occur primarily at Kīlauea's summit area and south flank, with continued small aftershocks of the magnitude-6.9 quake on May 4, 2018. Seismicity remains low in the lower ERZ. In the ERZ, ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues; no activity seen in satellite data

USGS Volcano Current Alerts - Tue, 11/13/2018 - 16:31
Nov 13, 2018 20:20 - Low-level unrest continues at Great Sitkin volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. No activity was observed in cloudy satellite images. Great Sitkin volcano 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 satellite data.
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; weak thermal anomaly in satellite data.

USGS Volcano Current Alerts - Tue, 11/13/2018 - 16:31
Nov 13, 2018 20:20 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. A faint thermal anomaly in the summit region was seen in a satellite image. Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. The web camera, one seismic station, and the local ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - No activity seen in satellite data or regional infrasound; seismic data out

USGS Volcano Current Alerts - Tue, 11/13/2018 - 16:31
Nov 13, 2018 20:20 - No eruptive activity was observed in satellite imagery or regional infrasound over the past day. The satellite link that transmits seismic data from Semisopochnoi failed on November 1, but an infrasound array on Adak Island should still detect significant explosive emissions from Semisopochnoi (with a 13-minute delay) if atmospheric conditions permit. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, though this is currently off-line, and remotely by satellite and lightning sensors. ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues, producing lava flow; elevated surface temperatures

USGS Volcano Current Alerts - Tue, 11/13/2018 - 16:31
Nov 13, 2018 20:20 - Veniaminof volcano continues to erupt, with minor lava spattering, effusion of a lava flow from the cone in the ice-filled summit caldera, and continuous, low-amplitude seismic tremor. Satellite views of the volcano over the past day showed elevated surface temperatures from the active lava effusion. Clouds in webcam and satellite views obscured any plume observations, however, diffuse ash and steam emissions may continue and trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof volcano is monitored with a local real-time seismic ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues; no activity seen in satellite data

USGS Volcano Current Alerts - Mon, 11/12/2018 - 15:33
Nov 12, 2018 20:42 - Low-level unrest continues at Great Sitkin volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. No activity was observed in cloudy satellite images. Great Sitkin volcano 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 satellite data.
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; no activity seen in satellite data

USGS Volcano Current Alerts - Mon, 11/12/2018 - 15:33
Nov 12, 2018 20:42 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic or regional infrasound data over the past day. No activity was observed in cloudy satellite images. Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. The web camera, one seismic station, and the local infrasound array are offline ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - No activity seen in satellite data or regional infrasound; seismic data out

USGS Volcano Current Alerts - Mon, 11/12/2018 - 15:33
Nov 12, 2018 20:42 - No eruptive activity was observed in cloudy satellite imagery or regional infrasound over the past day. The satellite link that transmits seismic data from Semisopochnoi failed on November 1, but an infrasound array on Adak Island should still detect significant explosive emissions from Semisopochnoi (with a 13-minute delay) if atmospheric conditions permit. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, though this is currently off-line, and remotely by satellite and lightning ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues, producing lava flow; elevated surface temperatures

USGS Volcano Current Alerts - Mon, 11/12/2018 - 15:33
Nov 12, 2018 20:42 - Veniaminof volcano continues to erupt, with minor lava spattering, effusion of a lava flow from the cone in the ice-filled summit caldera, and continuous, low-amplitude seismic tremor. Satellite views of the volcano over the past day showed elevated surface temperatures from the active lava effusion. Clouds in webcam and satellite views obscured any plume observations, however, diffuse ash and steam emissions may continue and trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof volcano is monitored with a local real-time seismic ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues; no activity seen in satellite data

USGS Volcano Current Alerts - Sun, 11/11/2018 - 15:32
Nov 11, 2018 21:01 - Low-level unrest continues at Great Sitkin volcano. Seismicity remains above background levels with a few small earthquakes detected over the past day. No activity was observed in cloudy satellite images or in regional infrasound data. Great Sitkin volcano 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 satellite data.
Categories: Volcano Reports

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