USGS Volcano Current Alerts

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Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program
Updated: 1 hour 10 min ago

AVO Great Sitkin YELLOW/ADVISORY - Seismicity slightly elevated; weakly elevated surface temps in satellite data

Tue, 06/18/2019 - 15:34
Jun 18, 2019 20:15 - Weakly elevated surface temperatures were observed at Great Sitkin in clear satellite views of the volcano over the past day. The level of seismic activity remains slightly above background. Nothing noteworthy was detected in seismic and regional infrasound 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, ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; nothing noteworthy seen in mostly cloudy satellite data

Tue, 06/18/2019 - 15:34
Jun 18, 2019 20:15 - No activity was observed in mostly cloudy satellite images over the past day. Nothing significant 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 frequently. Local seismic and infrasound data at Cleveland have been ...
Categories: Volcano Reports

HVO Kilauea GREEN/NORMAL - Low activity levels; no lava at the surface, modest inflation of summit magma reservoir.

Tue, 06/18/2019 - 15:34
Jun 18, 2019 18:56 - Activity Summary: Kīlauea Volcano is not erupting. Monitoring data from the past nine months have shown steady rates of seismicity, deformation, and low rates of sulfur dioxide emissions at the summit and East Rift Zone, including the area of the 2018 eruption. As of June 18, Kīlauea Volcano is at NORMAL/GREEN. For definitions of USGS Volcano Alert Levels and Aviation Color Codes, see: https://volcanoes.usgs.gov/vhp/about_alerts.html Despite this classification, Kīlauea remains an active volcano, and it will erupt again. Although we expect clear signs prior to a ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismicity remains slightly elevated; nothing else noteworthy in monitoring data

Mon, 06/17/2019 - 19:35
Jun 17, 2019 23:26 - Nothing significant was observed at Great Sitkin in mostly cloudy satellite views of the volcano over the past day. The level of seismic activity remains slightly above background. Nothing noteworthy was detected in seismic and regional infrasound data 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; weakly elevated surface temperatures seen in satellite data

Mon, 06/17/2019 - 19:35
Jun 17, 2019 23:26 - Weakly elevated surface temperatures were observed in partly cloudy satellite images over the past day. Nothing significant 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 frequently. Local seismic and infrasound ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismicity remains slightly elevated; nothing else noteworthy in monitoring data

Sun, 06/16/2019 - 15:40
Jun 16, 2019 20:34 - Nothing significant observed at Great Sitkin in mostly cloudy satellite views of the volcano over the past day. The level of seismic activity remains slightly above background. Nothing noteworthy was detected in seismic and regional infrasound data over the past day. An AVO field crew working on Great Sitkin Island reported no unusual activity. 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest likely continues; possible elevated surface temps in satellite data

Sun, 06/16/2019 - 15:40
Jun 16, 2019 20:34 - Slightly elevated surface temperatures observed in two satellite images over the past day; most satellite views of the volcano obscured by clouds. Nothing significant 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 ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismicity remains slightly elevated; nothing else noteworthy in monitoring data

Sat, 06/15/2019 - 18:43
Jun 15, 2019 21:02 - Nothing significant observed at Great Sitkin in mostly cloudy satellite views of the volcano over the past day. The level of seismic activity remains slightly above background. Nothing noteworthy was detected in seismic and regional infrasound data 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest likely continues; possible elevated surface temps in satellite data

Sat, 06/15/2019 - 18:43
Jun 15, 2019 21:02 - Cleveland volcano mostly obscured by clouds over the past day. Possible slightly elevated surface temperatures observed one satellite image from yesterday afternoon. Nothing significant 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 ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismic activity above background; nothing observed in satellite data this week

Fri, 06/14/2019 - 14:38
Jun 14, 2019 19:00 - The level of seismic activity has been slightly elevated and just above background during the past week. Two minor emission events occurred on June 7 and 9 that may have been related to small steam explosions. The June 7 event produced no obvious ash fallout based on a June 8 photograph of the summit taken by a passing pilot. Since then the volcano has been obscured by clouds and nothing of note has been observed in satellite data. Field crews working on Adak had no reports of activity at Great Sitkin. Great Sitkin Volcano is monitored with a local real-time seismic ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Elevated surface temperatures observed but no explosive activity over the past week

Fri, 06/14/2019 - 14:38
Jun 14, 2019 19:00 - No activity was detected in regional seismic or infrasound data over the past week. Elevated surface temperatures were observed several times during the week, but no new lava effusion or changes in the summit vent have been observed in satellite data. There has been no evidence of dome growth or changes within the summit crater since early March 2019. Additional episodes of lava effusion and explosions are likely and will occur without advance warning. The most recent explosion of Cleveland occurred on January 9, 2019. These explosions are normally short duration and ...
Categories: Volcano Reports

AVO Pavlof GREEN/NORMAL - Unrest has dropped to background levels; volcano moved to GREEN/NORMAL this week

Fri, 06/14/2019 - 14:38
Jun 14, 2019 19:00 - Seismic activity has declined to background levels and the Aviation Color Code and Alert Level was lowered to GREEN/NORMAL on June 12, 2019. Vapor emissions from the summit vent may be observed occasionally and elevated surface temperatures may be detected in high-resolution satellite data. These outward signs of unrest are common and are considered normal background behavior for Pavlof Volcano. Rapid escalation of unrest can occur with only subtle changes in the level of seismic activity and it remains possible for the volcano to become active at any time. Pavlof is ...
Categories: Volcano Reports

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

Fri, 06/14/2019 - 12:38
Jun 14, 2019 16:24 - 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: Monitoring systems show that activity at Cascade Range volcanoes remained at background levels throughout the week. Earthquakes were recorded at Mount St. Helens, Mount Rainier, and Crater Lake. Crater Lake has been seismically quiet ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismicity remains slightly elevated; nothing else noteworthy in monitoring data

Thu, 06/13/2019 - 17:32
Jun 13, 2019 19:00 - Nothing significant observed at Great Sitkin in mostly cloudy satellite views of the volcano over the past day. The level of seismic activity remains slightly above background. Nothing noteworthy was detected in seismic and regional infrasound data 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest likely continues; nothing observed in satellite data

Thu, 06/13/2019 - 17:32
Jun 13, 2019 19:00 - Cleveland volcano obscured by clouds and nothing observed in satellite data over the past day. Nothing significant 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 frequently. Local seismic and infrasound data at ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismicity remains slightly elevated; nothing else noteworthy in monitoring data

Wed, 06/12/2019 - 18:33
Jun 12, 2019 20:24 - Nothing significant observed at Great Sitkin in mostly cloudy satellite views of the volcano over the past day. The level of seismic activity remains slightly above background. Otherwise, nothing noteworthy detected in seismic and regional infrasound data 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest likely continues; nothing observed in satellite data

Wed, 06/12/2019 - 18:33
Jun 12, 2019 20:24 - Cleveland volcano obscured by clouds and nothing observed in satellite data over the past day. Nothing significant 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 frequently. Local seismic and infrasound data at ...
Categories: Volcano Reports

AVO Pavlof GREEN/NORMAL - Alert Level Change to GREEN/NORMAL due to unrest ending

Wed, 06/12/2019 - 14:36
Jun 12, 2019 19:08 - The elevated levels of seismic activity, apparent since about mid-May, have declined to background levels. Therefore we are lowering the Aviation Color Code and Alert Level to GREEN/NORMAL. The volcano continues to emit a vapor plume that is occasionally visible in web camera views, and elevated surface temperatures continue to be observed occasionally at the summit crater in high-resolution satellite data. Such observations are common and reflect the steady emission of hot volcanic vapors from a near-vertically oriented vent.
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Seismicity remains slightly elevated; nothing else noteworthy in monitoring data

Tue, 06/11/2019 - 16:35
Jun 11, 2019 19:57 - Nothing significant observed at Great Sitkin in mostly cloudy satellite data during the past day. The level of seismic activity remains slightly above background. Otherwise, nothing noteworthy detected in seismic and regional infrasound data 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 observed in satellite data

Tue, 06/11/2019 - 16:35
Jun 11, 2019 19:57 - Elevated surface temperatures were observed at the summit of Cleveland volcano in a few partly cloudy satellite images over the past day. Nothing significant 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 ...
Categories: Volcano Reports

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