Volcano Reports

HVO Kilauea ORANGE/WATCH - No incandescence, minor fume from Fissure 8; Summit quiet.

USGS Volcano Current Alerts - Thu, 09/20/2018 - 14:31
Sep 20, 2018 19:03 - Kīlauea summit and lower East Rift Zone On Kīlauea Volcano's lower East Rift Zone (LERZ), no incandescence was visible overnight in the collapse pit within the fissure 8 cone. Minor fuming is visible during the day. Seismicity and ground deformation remain low at the summit of Kīlauea. Small aftershocks from the magnitude-6.9 earthquake in early May are still being generated on faults located on Kīlauea's South Flank. No collapses within Puʻu ʻŌʻō crater have been observed over the past few days. Rates of tilting throughout the East Rift Zone are much ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismic unrest continues. No activity seen in satellite data.

USGS Volcano Current Alerts - Wed, 09/19/2018 - 18:30
Sep 19, 2018 21:02 - Low-level unrest continues at Great Sitkin Volcano. Seismicity activity remains elevated. Nothing significant was observed in regional infrasound data or mostly cloudy satellite images during the last 24 hours. 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. Elevated surface temperatures. No significant seismic activity.

USGS Volcano Current Alerts - Wed, 09/19/2018 - 18:30
Sep 19, 2018 21:02 - Low-level unrest continues at Cleveland Volcano. Elevated surface temperatures were observed in satellite images, and clear webcam views also show a small steam plume over the past day. No significant activity has been detected in seismic or infrasound data. 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.
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Unrest continues. Seismicity remains elevated.

USGS Volcano Current Alerts - Wed, 09/19/2018 - 18:30
Sep 19, 2018 21:02 - Unrest continues at Semisopochnoi volcano. Seismicity remains elevated and has changed from constant tremor to intermittent, discrete tremor bursts over the past 7 hours. No volcanic activity was observed in cloudy satellite data over the past day, and no activity has been detected in regional infrasound data. 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 13 minute delay if atmospheric conditions permit.
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption of lava flow likely continues. No significant ash emissions.

USGS Volcano Current Alerts - Wed, 09/19/2018 - 18:30
Sep 19, 2018 21:02 - Eruption of a lava flow from Veniaminof volcano's summit cone likely continues, as suggested by continued observations of elevated seismic activity, incandescence in nighttime webcam images, and elevated surface temperatures in thermal satellite data. No significant ash emissions have been observed. Veniaminof 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, ...
Categories: Volcano Reports

HVO Kilauea ORANGE/WATCH - No incandescence, minor fume from Fissure 8; Summit quiet.

USGS Volcano Current Alerts - Wed, 09/19/2018 - 15:30
Sep 19, 2018 18:37 - Kīlauea summit and lower East Rift Zone On Kīlauea Volcano's lower East Rift Zone (LERZ), no incandescence was visible overnight in the collapse pit within the fissure 8 cone. Minor fuming is visible during the day. Seismicity and ground deformation remain low at the summit of Kīlauea. Small aftershocks from the magnitude-6.9 earthquake in early May are still being generated on faults located on Kīlauea's South Flank. No collapses within Puʻu ʻŌʻō crater have been observed over the past few days. Rates of tilting throughout the East Rift Zone are much ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismic unrest continues. No activity seen in satellite data.

USGS Volcano Current Alerts - Tue, 09/18/2018 - 15:31
Sep 18, 2018 19:55 - Low-level unrest continues at Great Sitkin Volcano. Earthquake activity remains elevated. Tremor activity was recorded in seismic data at 03:05 AKDT September 18 (11:05 UTC). The event is similar to previous tremor bursts that have occurred over the past few months at Great Sitkin, one of which resulted from a phreatic explosion that produced a small ash deposit near the summit on June 10. Nothing significant was observed in regional infrasound data or cloudy satellite images during the last 24 hours. Great Sitkin Volcano is monitored with a local real-time seismic ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues. Elevated surface temperatures. No significant seismic activity.

USGS Volcano Current Alerts - Tue, 09/18/2018 - 15:31
Sep 18, 2018 19:55 - Low-level unrest continues at Cleveland Volcano. Elevated surface temperatures were observed in satellite images, and clear webcam views also show a small steam plume over the past day. No significant activity has been detected in seismic or infrasound data. 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.
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Unrest continues. Seismicity remains elevated.

USGS Volcano Current Alerts - Tue, 09/18/2018 - 15:31
Sep 18, 2018 19:55 - Unrest continues at Semisopochnoi volcano. Seismicity remains elevated with nearly constant tremor being recorded by local sensors. No volcanic activity was observed in cloudy satellite data over the past day, and no activity has been detected in regional infrasound data. 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 13 minute delay if atmospheric conditions permit.
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption of lava flow likely continues. No significant ash emissions.

USGS Volcano Current Alerts - Tue, 09/18/2018 - 15:31
Sep 18, 2018 19:55 - Eruption of a lava flow from Veniaminof volcano's summit cone likely continues, as suggested by continued observations of elevated seismic activity and elevated surface temperatures in thermal satellite data. Incandescence was not observed in nighttime webcam images, but views were likely obscured by clouds. No significant ash emissions have been observed. Veniaminof 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 ...
Categories: Volcano Reports

HVO Kilauea ORANGE/WATCH - No incandescence, minor fume from Fissure 8; Summit quiet.

USGS Volcano Current Alerts - Tue, 09/18/2018 - 15:31
Sep 18, 2018 17:43 - Kīlauea summit and lower East Rift Zone On Kīlauea Volcano's lower East Rift Zone (LERZ), the collapse pit is the central part of a slowly subsiding lava surface that previously filled the fissure 8 cone. No incandescence is visible overnight while minor fuming is visible during the day. Seismicity and ground deformation remains low at the summit of Kīlauea. Aftershocks from the magnitude-6.9 earthquake in early May are still being generated on faults located on Kīlauea's South Flank. No collapses within Puʻu ʻŌʻō crater have been observed over the ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismic unrest continues. No activity seen in satellite data.

USGS Volcano Current Alerts - Mon, 09/17/2018 - 19:31
Sep 17, 2018 23:41 - Low-level unrest continues at Great Sitkin Volcano. Earthquake activity remains elevated. No significant activity was observed in partly cloudy satellite images over the past day. 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. Elevated surface temperatures. No significant seismic activity.

USGS Volcano Current Alerts - Mon, 09/17/2018 - 19:31
Sep 17, 2018 23:41 - Low-level unrest continues at Cleveland Volcano. Elevated surface temperatures were observed in satellite images over the past day. However, no significant activity has been detected in seismic or pressure sensor (infrasound) data. 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.
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Unrest continues. Seismicity remains elevated.

USGS Volcano Current Alerts - Mon, 09/17/2018 - 19:31
Sep 17, 2018 23:41 - Unrest continues at Semisopochnoi volcano. The onset of continuous seismicity yesterday prompted AVO to raise the Aviation Color Code and Volcano Alert Level to YELLOW/ADVISORY. Retrospective analysis of satellite data from September 10 shows evidence of a small ash deposit on the flanks of the north cone of Mount Cerberus, which may have resulted from two minor seismic tremor bursts recorded on September 8. This satellite imagery, combined with a further increase in seismic tremor amplitudes today, prompted AVO to raise the Aviation Color Code and Volcano Alert Level to ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption of lava flow likely continues. No significant ash emissions.

USGS Volcano Current Alerts - Mon, 09/17/2018 - 19:31
Sep 17, 2018 23:41 - Eruption of a lava flow from Veniaminof volcano's summit cone likely continues, as suggested by continued observations of elevated seismic activity, nighttime incandescence in webcam images, and elevated surface temperatures in thermal satellite data. No significant ash emissions have been observed. Veniaminof 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, ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Strong seismicity suggests ash emissions may be occurring or are imminent.

USGS Volcano Current Alerts - Mon, 09/17/2018 - 17:31
Sep 17, 2018 21:33 - Elevated seismicity that started yesterday has intensified over the past couple of hours, and a strong tremor signal at 20:49 UTC (12:49 AKDT) suggests that ash emissions may be occurring or are imminent at Semisopochnoi. Thus we are raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. Nothing has been detected in satellite, lightning, or infrasound data.
Categories: Volcano Reports

HVO Kilauea ORANGE/WATCH - No incandescence, minor fume from Fissure 8; Summit quiet.

USGS Volcano Current Alerts - Mon, 09/17/2018 - 15:32
Sep 17, 2018 17:55 - Kīlauea summit and lower East Rift Zone On Kīlauea Volcano's lower East Rift Zone (LERZ), the collapse pit is the central part of a slowly subsiding lava surface that previously filled the fissure 8 cone. No incandescence is visible overnight while minor fuming is visible during the day. Seismicity and ground deformation remains low at the summit of Kīlauea. Aftershocks from the magnitude-6.9 earthquake in early May are still being generated on faults located on Kīlauea's South Flank. No collapses within Puʻu ʻŌʻō crater have been observed over the ...
Categories: Volcano Reports

HVO Kilauea ORANGE/WATCH - No incandescence, minor fume from Fissure 8; Summit quiet.

USGS Volcano Current Alerts - Sun, 09/16/2018 - 14:30
Sep 16, 2018 18:43 - Kīlauea summit and lower East Rift Zone On Kīlauea Volcano's lower East Rift Zone (LERZ), the collapse pit is the central part of a slowly subsiding lava surface that previously filled the fissure 8 cone. No incandescence is visible overnight while minor fuming is visible during the day. Seismicity and ground deformation remains low at the summit of Kīlauea. Aftershocks from the magnitude-6.9 earthquake in early May are still being generated on faults located on Kīlauea's South Flank. No collapses within Puʻu ʻŌʻō crater have been observed over the ...
Categories: Volcano Reports

AVO Semisopochnoi YELLOW/ADVISORY - Increased seismicity over the past 2 hours. No signs of eruptive activity.

USGS Volcano Current Alerts - Sun, 09/16/2018 - 14:30
Sep 16, 2018 17:56 - An increase in seismicity beginning 16:31 UTC (08:31 AKDT) on has prompted AVO to raise the Aviation Color Code and Volcano Alert Level to YELLOW/ADVISORY. There is no clear indication from satellite imagery or regional infrasound data that Semisopochnoi is erupting at this time. AVO will continue to monitor Semisopochnoi seismic data and evaluate satellite images.
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues. Small earthquakes recorded. No activity seen in satellite data.

USGS Volcano Current Alerts - Sat, 09/15/2018 - 16:32
Sep 15, 2018 20:51 - Low-level unrest continues at Great Sitkin Volcano. Earthquake activity remains elevated. No significant activity was observed in partly 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

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