USGS Volcano Current Alerts

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Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program
Updated: 4 min 23 sec ago

HVO Kilauea ORANGE/WATCH - Kīlauea's eruption lull continues.

Tue, 08/21/2018 - 18:31
Aug 21, 2018 23:06 - Kīlauea summit and lower East Rift Zone Seismicity and ground deformation are negligible at the summit of Kīlauea Volcano. On the volcano's lower East Rift Zone (LERZ), only a few ocean entries are oozing lava; laze plumes are minimal. Sulfur dioxide emission rates at both the summit and LERZ are drastically reduced; the combined rate is lower than at any time since late 2007. The Hawaiian Volcano Observatory (HVO) will continue to closely monitor Kīlauea’s seismicity, deformation, and gas emissions for any sign of reactivation, and maintain visual ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues. No significant activity observed in seismic or satellite data.

Tue, 08/21/2018 - 14:30
Aug 21, 2018 18:36 - Low-level unrest continues at Great Sitkin Volcano. Nothing significant was observed in cloudy satellite images or seismic data 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 ORANGE/WATCH - No significant activity observed in seismic or satellite data

Tue, 08/21/2018 - 14:30
Aug 21, 2018 18:36 - Eruptive activity may have paused at Cleveland. Satellite and web camera observations were obscured by clouds. No significant activity was detected in seismic or pressure sensor (infrasound) data during the last 24 hours. 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

HVO Kilauea ORANGE/WATCH - Kīlauea's eruption lull continues.

Mon, 08/20/2018 - 19:31
Aug 20, 2018 23:52 - Kīlauea summit and lower East Rift Zone Seismicity and ground deformation are negligible at the summit of Kīlauea Volcano. On the volcano's lower East Rift Zone (LERZ), only a few ocean entries are oozing lava; laze plumes are minimal. Sulfur dioxide emission rates at both the summit and LERZ are drastically reduced; the combined rate is lower than at any time since late 2007. The Hawaiian Volcano Observatory (HVO) will continue to closely monitor Kīlauea’s seismicity, deformation, and gas emissions for any sign of reactivation, and maintain visual ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues. No significant activity observed in seismic or satellite data.

Mon, 08/20/2018 - 17:31
Aug 20, 2018 20:32 - Low-level unrest continues at Great Sitkin Volcano. Nothing significant was observed in cloudy satellite images or seismic data 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 ORANGE/WATCH - Unrest continues. No significant activity observed in seismic or satellite data

Mon, 08/20/2018 - 17:31
Aug 20, 2018 20:32 - Unrest continues at Cleveland volcano. Satellite and web camera observations were obscured by clouds. No significant activity was detected in seismic or pressure sensor (infrasound) data during the last 24 hours. 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

HVO Kilauea ORANGE/WATCH - Kīlauea's eruption lull continues.

Sun, 08/19/2018 - 19:31
Aug 19, 2018 22:39 - Kīlauea summit and lower East Rift Zone The lull in activity at Kīlauea Volcano continues. At the summit, seismicity and deformation are negligible. On the lower East Rift Zone, the only incandescence is at the coast near Ahalanui where a few ocean entries are oozing lava. Sulfur dioxide emission rates at both the summit and LERZ are drastically reduced; the combined rate is lower than at any time since late 2007. HVO Operations The Hawaiian Volcano Observatory (HVO) will continue to closely monitor Kīlauea’s seismicity, deformation, and gas emissions for ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues. No significant activity observed in seismic or satellite data.

Sun, 08/19/2018 - 14:31
Aug 19, 2018 18:52 - Low-level unrest continues at Great Sitkin Volcano. Nothing significant was observed in cloudy satellite images or seismic data 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 ORANGE/WATCH - Unrest continues. No significant activity observed in seismic or satellite data

Sun, 08/19/2018 - 14:31
Aug 19, 2018 18:52 - Unrest continues at Cleveland volcano. Satellite and web camera observations were obscured by clouds. No significant activity was detected in seismic or pressure sensor (infrasound) data during the last 24 hours. 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

HVO Kilauea ORANGE/WATCH - Kīlauea's eruption lull continues.

Sun, 08/19/2018 - 00:31
Aug 19, 2018 04:05 - Kīlauea summit and lower East Rift Zone The lull in activity at Kīlauea Volcano continues. At the summit, seismicity and deformation are negligible. On the lower East Rift Zone, the only incandescence is at the coast near Ahalanui where a few ocean entries are oozing lava. Sulfur dioxide emission rates at both the summit and LERZ are drastically reduced; the combined rate is lower than at any time since late 2007. Earthquake and deformation data show no net accumulation, withdrawal, or significant movement of subsurface magma or pressurization as would be ...
Categories: Volcano Reports

AVO Cleveland ORANGE/WATCH - Unrest continues. No significant activity observed in seismic or satellite data

Sat, 08/18/2018 - 16:32
Aug 18, 2018 19:33 - Unrest continues at Cleveland volcano. Satellite and web camera observations were obscured by clouds. No significant activity was detected in seismic or pressure sensor (infrasound) data during the last 24 hours. 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 Great Sitkin YELLOW/ADVISORY - Low-level unrest continues. Small explosion on Aug 11.Seismicity is low.

Fri, 08/17/2018 - 17:31
Aug 17, 2018 21:40 - Low-level unrest continues at Great Sitkin Volcano. A small phreatic explosion was observed in seismic data at 11:05 am AKDT on August 11 (19:05 UTC). Small local earthquakes preceded the event and stopped following the phreatic explosion. The event is similar to 3 other phreatic explosions that have occurred over the past 2 years at Great Sitkin, most recently on June 10, 2018. Satellite observations were obscured by clouds throughout the past week. Seismicity levels over the past week have been low, but remain above background. Great Sitkin Volcano is monitored ...
Categories: Volcano Reports

AVO Cleveland ORANGE/WATCH - Unrest continues. Elevated surface temperatures seen several days over past week.

Fri, 08/17/2018 - 17:31
Aug 17, 2018 21:40 - Unrest continues at Cleveland volcano. Moderately elevated surface temperatures were observed most days over the past week. Occasional clear web camera views of the summit showed slight steam emissions. No significant activity was detected in seismic and infrasound (pressure) sensor data throughout the week. Future explosive activity is likely and is expected to occur without warning. Previous explosions have produced hazardous conditions primarily near the volcano, but occasionally they have been large enough to produce a drifting ash cloud. Cleveland volcano ...
Categories: Volcano Reports

CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.

Fri, 08/17/2018 - 16:31
Aug 17, 2018 20:19 - 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: No significant changes were detected at Cascade Range volcanoes this week. Small earthquakes were located at Mount St. Helens and Mount Rainier, as is usual for these volcanoes.
Categories: Volcano Reports

HVO Kilauea ORANGE/WATCH - Lowering Alert Level from WARNING to WATCH

Fri, 08/17/2018 - 16:31
Aug 17, 2018 18:39 - Lowering Alert Level from WARNING to WATCH In light of the reduced eruptive activity at Kīlauea Volcano over the last several days, HVO is lowering the Alert Level for ground based hazards from WARNING to WATCH. This change indicates that the hazards posed by crater collapse events (at the Kīlauea summit) and lava flows (Lower East Rift Zone; LERZ) are diminished. However, the change does not mean with absolute certainty that the LERZ eruption or summit collapses are over. It remains possible that eruption and collapse activity could resume. Although no signs of ...
Categories: Volcano Reports

HVO Kilauea ORANGE/WARNING - LERZ activity in a lull; summit seismicity and deformation diminished.

Thu, 08/16/2018 - 18:30
Aug 16, 2018 23:24 - Kīlauea summit and lower East Rift Zone The lull in activity at Kīlauea Volcano continues. No summit collapse events have occurred since August 2, and, with the exception of a small, crusted-over pond of lava deep inside the fissure 8 cone and a few scattered ocean entries, lava stopped flowing in the lower East Rift Zone (LERZ) on August 6. Sulfur dioxide emission rates at both the summit and LERZ are drastically reduced; the combined rate is lower than at any time since late 2007. Earthquake and deformation data show no net accumulation, withdrawal, or ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues. No significant activity observed in seismic or satellite data.

Thu, 08/16/2018 - 15:30
Aug 16, 2018 20:31 - Low-level unrest continues at Great Sitkin Volcano. Nothing significant was observed in cloudy satellite images or seismic data 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 ORANGE/WATCH - Unrest continues. Elevated surface temperatures observed in satellite data.

Thu, 08/16/2018 - 15:30
Aug 16, 2018 20:31 - Unrest continues at Cleveland volcano. Elevated surface temperatures were observed in satellite images over the past 24 hours. Nothing significant was detected in seismic or pressure sensor (infrasound) data during the last 24 hours. 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

HVO Kilauea ORANGE/WARNING - LERZ activity in a lull; summit seismicity and deformation diminished.

Wed, 08/15/2018 - 18:31
Aug 15, 2018 22:42 - Kīlauea summit and lower East Rift Zone Kīlauea Volcano has remained quiet for well over a week now, with no further collapse events at the summit, and, with the exception of a small, crusted-over pond of lava deep inside the fissure 8 cone and a few scattered ocean entries, no lava flowing in the lower East Rift Zone (LERZ). Earthquake and deformation data show no net accumulation, withdrawal, or significant movement of subsurface magma or pressurization as would be expected if the system was building toward a resumption of activity. It is too soon to tell if ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues. No significant activity observed in seismic or satellite data.

Wed, 08/15/2018 - 15:31
Aug 15, 2018 19:47 - Low-level unrest continues at Great Sitkin Volcano. Nothing significant was observed in cloudy satellite images or seismic data 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

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