Volcano Reports

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

USGS Volcano Current Alerts - Tue, 11/06/2018 - 20:32
Nov 7, 2018 01:56 - 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; possible small explosion detected

USGS Volcano Current Alerts - Tue, 11/06/2018 - 17:32
Nov 6, 2018 20:44 - Low-level unrest continues at Great Sitkin volcano. Seismicity remains above background levels with several small earthquakes detected over the past day. In addition, seismicity consistent with a possible small explosion was observed at 01:58 UTC November 6 (16:58 AKST November 5). This event, however, was not observed in regional infrasound data, and no ash emission was seen in mostly 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 ...
Categories: Volcano Reports

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

USGS Volcano Current Alerts - Tue, 11/06/2018 - 17:32
Nov 6, 2018 20:44 - 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 due ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Unrest continues; no activity seen in satellite data; no infrasound detections

USGS Volcano Current Alerts - Tue, 11/06/2018 - 17:32
Nov 6, 2018 20:44 - Unrest continues at Semisopochnoi volcano. No eruptive activity was observed in satellite imagery. 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. No such infrasound detections were recorded over the past day. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, though this is ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues, producing lava flow; diffuse ash emissions continue

USGS Volcano Current Alerts - Tue, 11/06/2018 - 17:32
Nov 6, 2018 20:44 - 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. A new high resolution image shows that the current lava flow extends 1.2 km (0.75 mi) from the vent. A diffuse ash plume up to 12,000 ft and drifting to the northeast was visible in satellite images throughout the day and reported by a pilot at 22:51 UTC (13:51 AKST) on ...
Categories: Volcano Reports

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

USGS Volcano Current Alerts - Mon, 11/05/2018 - 16:32
Nov 5, 2018 21:02 - Low-level unrest continues at Great Sitkin volcano. Seismicity remains above background levels with several small earthquakes detected over the past day. No activity was observed in 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

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

USGS Volcano Current Alerts - Mon, 11/05/2018 - 16:32
Nov 5, 2018 21:02 - 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 due ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Unrest continues; no activity seen in satellite data; no infrasound detections

USGS Volcano Current Alerts - Mon, 11/05/2018 - 16:32
Nov 5, 2018 21:02 - Unrest continues at Semisopochnoi volcano. No eruptive activity was observed in satellite imagery. 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. No such infrasound detections were recorded over the past day. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, though this is ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues, producing lava flow; diffuse ash emissions continue

USGS Volcano Current Alerts - Mon, 11/05/2018 - 16:32
Nov 5, 2018 21:02 - 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 and incandescence was visible in webcam views from Perryville overnight. A diffuse ash plume up to 14,000 ft and drifting to the east was visible in satellite images overnight and reported by a pilot at 17:05 UTC (8:05 AKST) on November 5. Trace ashfall is possible in nearby ...
Categories: Volcano Reports

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

USGS Volcano Current Alerts - Sun, 11/04/2018 - 14:32
Nov 4, 2018 20:25 - Low-level unrest continues at Great Sitkin volcano. Nothing significant has been detected in seismic and regional infrasound data over the past day. No activity was observed in 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 - Sun, 11/04/2018 - 14:32
Nov 4, 2018 20:25 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic and 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 - Unrest continues; no activity seen in satellite data; no infrasound detections

USGS Volcano Current Alerts - Sun, 11/04/2018 - 14:32
Nov 4, 2018 20:25 - Unrest continues at Semisopochnoi volcano. No eruptive activity was observed in satellite imagery. The satellite link that transmits seismic data from Semisopochnoi failed on Thursday, 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. No such infrasound detections were recorded over the past day. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, thought ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues, producing lava flow; diffuse ash emissions continue

USGS Volcano Current Alerts - Sun, 11/04/2018 - 14:32
Nov 4, 2018 20:25 - 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. A diffuse ash plume was also visible in satellite and webcam images. Trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in ...
Categories: Volcano Reports

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

USGS Volcano Current Alerts - Sat, 11/03/2018 - 14:32
Nov 3, 2018 19:06 - Low-level unrest continues at Great Sitkin volcano. Seismically, the volcano has been relatively quiet 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 - Sat, 11/03/2018 - 14:32
Nov 3, 2018 19:06 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic and 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 - Unrest continues; no activity seen in satellite data; no infrasound detections

USGS Volcano Current Alerts - Sat, 11/03/2018 - 14:32
Nov 3, 2018 19:06 - Unrest continues at Semisopochnoi volcano. Satellite views of the volcano were obscured by clouds over the past day, and no eruptive activity was observed. The satellite link that transmits seismic data from Semisopochnoi failed on Thursday, 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. No such infrasound detections were recorded over the past day. Additional explosions are possible and will likely occur without warning. Semisopochnoi ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues, producing lava flow; diffuse ash emissions likely continue

USGS Volcano Current Alerts - Sat, 11/03/2018 - 14:32
Nov 3, 2018 19:06 - 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, when not obscured by clouds, showed elevated surface temperatures from the active lava effusion. Poor weather conditions prevented webcam views of the eruption, but diffuse ash emissions, which are often seen in webcam images, likely continue. Trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Unrest continues; seismicity elevated; small explosion detected

USGS Volcano Current Alerts - Fri, 11/02/2018 - 17:31
Nov 2, 2018 21:46 - Low-level unrest continues at Great Sitkin Volcano. Seismicity remains elevated with small earthquakes occurring at rates slightly above background levels. In addition, a small explosion was detected seismically on Tuesday morning, though it was not seen in regional infrasound data and no ash cloud was observed in satellite data. No other activity was observed in partly cloudy to mostly cloudy satellite images or regional infrasound data over the past week. Great Sitkin Volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues; seismicity low; elevated surface temperatures observed

USGS Volcano Current Alerts - Fri, 11/02/2018 - 17:31
Nov 2, 2018 21:46 - Nothing significant was detected in seismic or infrasound (pressure) sensor data this week. Elevated surface temperatures were observed in satellite data a few times, but most satellite views were obscured by clouds 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 is monitored by only two seismic stations, which restricts AVO's ability to ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Unrest continues; several small explosions; no ash clouds detected

USGS Volcano Current Alerts - Fri, 11/02/2018 - 17:31
Nov 2, 2018 21:46 - Several small explosive events, along with intermittent tremor, occurred at Semisopochnoi early in the week. No ash clouds associated with these events were detected in satellite data. No explosions have been detected since Wednesday, October 31, though periods of tremor were observed early on Thursday, November 1. The satellite link that transmits seismic data from Semisopochnoi failed later on Thursday, November 1. The infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a 13-minute delay, if atmospheric conditions permit. A return ...
Categories: Volcano Reports

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