Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues. Lava flow active; diffuse ash emissions continue.

USGS Volcano Current Alerts - Tue, 10/30/2018 - 19:32
Oct 30, 2018 21:56 - The eruption continues at Veniaminof volcano and is characterized by minor lava spattering and effusion of a lava flow from the cone in the ice-filled summit caldera. Seismicity consists of low-amplitude continuous tremor, and satellite views of the volcano showed elevated surface temperatures from the active lava effusion. Diffuse ash emissions were observed in web camera images over the past day. Trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof Volcano is monitored with a local real-time seismic network, which will ...
Categories: Volcano Reports

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

USGS Volcano Current Alerts - Tue, 10/30/2018 - 14:32
Oct 30, 2018 19:24 - 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 (magnitude-3.8 was the largest) with continued small aftershocks of the magnitude-6.9 quake on May 4, 2018. Seismicity remains low in the ...
Categories: Volcano Reports

YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: normal earthquake rates and deformation; new hydrothermal activity

USGS Volcano Current Alerts - Mon, 10/29/2018 - 18:32
Oct 1, 2018 19:54 - Recent work and news September was a month of hydrothermal activity at Yellowstone. Steamboat geyser experienced water eruptions on September 1, 7, 12, 17, 24, and 30. This brings the total number of Steamboat eruptions in 2018 to 21. In addition, a rare eruption of Ear Spring in the Upper Geyser Basin, not far from Old Faithful, occurred on September 15 and was accompanied by changes to springs and geysers in the Geyser Hill area. A new thermal feature also formed at that time nearby, spouting scalding water that necessitated the closure of the boardwalk through ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Low-level unrest continues. No activity observed in satellite data.

USGS Volcano Current Alerts - Mon, 10/29/2018 - 17:32
Oct 29, 2018 21:28 - 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 regional infrasound data or in mostly cloudy satellite images during 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues. Elevated surface temperatures observed in satellite data.

USGS Volcano Current Alerts - Mon, 10/29/2018 - 17:32
Oct 29, 2018 21:28 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic and regional infrasound data. Elevated surface temperatures observed in satellite images during periods of clear weather over the past day. 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 ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Eruption continues. Small explosions detected. No ash cloud observed in satellite.

USGS Volcano Current Alerts - Mon, 10/29/2018 - 17:32
Oct 29, 2018 21:28 - The eruption continues at Semisopochnoi volcano. Small explosions were detected in seismic and infrasound data over the past day. No ash clouds were observed in partly cloudy to cloudy satellite images. Additional explosions are possible and will likely occur without warning. 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 continues. Lava flow and diffuse ash emissions.

USGS Volcano Current Alerts - Mon, 10/29/2018 - 17:32
Oct 29, 2018 21:28 - The eruption continues at Veniaminof volcano and is characterized by minor lava spattering and effusion of a lava flow from the cone in the ice-filled summit caldera. Seismicity consists of low-amplitude continuous tremor, and satellite views of the volcano showed elevated surface temperatures from the active lava effusion. Diffuse ash emissions were observed in web camera images over the past day. Trace ashfall is possible in nearby communities under favorable wind conditions. Veniaminof Volcano is monitored with a local real-time seismic network, which will ...
Categories: Volcano Reports

CALVO GREEN/NORMAL - Activity Update: Volcanoes monitored by CalVO show normal levels of background seismicity and ...

USGS Volcano Current Alerts - Mon, 10/29/2018 - 17:32
Oct 1, 2018 17:10 - Monitored CALIFORNIA VOLCANOES Current Volcano Alert Level: all NORMAL Current Aviation Color Code: all GREEN Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes. Observations for September 1, 2018 (0000h PST) through September 30, 2018 (2359h PDT): Mt ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Low-level unrest continues. No activity observed in satellite data.

USGS Volcano Current Alerts - Sun, 10/28/2018 - 16:32
Oct 28, 2018 19:37 - Low-level unrest continues at Great Sitkin volcano. Seismicity remains above background levels with numerous small earthquakes detected over the past day. No activity was observed in regional infrasound data or in mostly cloudy satellite images during 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 ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues. No activity observed in monitoring data.

USGS Volcano Current Alerts - Sun, 10/28/2018 - 16:32
Oct 28, 2018 19:37 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic and regional infrasound data. No activity observed in satellite images during periods of clear weather over the past day. 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 - Eruption continues. Small explosions detected. No ash cloud observed in satellite.

USGS Volcano Current Alerts - Sun, 10/28/2018 - 16:32
Oct 28, 2018 19:37 - The eruption continues at Semisopochnoi volcano. Small explosions were detected in seismic data over the past day. No ash clouds were observed in satellite images but the volcano was obscured by meteorological clouds with altitudes that ranged from 10,000 to 15,000 ft asl. Additional explosions are possible and will likely occur without warning. 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 ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues. Lava flow and diffuse ash emissions.

USGS Volcano Current Alerts - Sun, 10/28/2018 - 16:32
Oct 28, 2018 19:37 - The eruption continues at Veniaminof volcano and is characterized by minor lava spattering and effusion of a lava flow from the cone in the ice-filled summit caldera. Seismicity consists of low-amplitude continuous tremor and satellite views of the volcano showed elevated surface temperatures from the active lava effusion. Diffuse ash emissions were observed in web camera images at times over the past day and the resulting plume typically dissipates rapidly. Ash emissions are typically not accompanied by an increase in seismic tremor and trace ashfall is possible in ...
Categories: Volcano Reports

AVO Katmai GREEN/NORMAL - Resuspended ash from 1912 Novarupta eruption seen near King Salmon. No eruption occurring.

USGS Volcano Current Alerts - Sun, 10/28/2018 - 02:32
Sep 30, 2018 05:04 - Strong southeast winds in the vicinity of Katmai and the Valley of Ten Thousand Smokes have picked up loose volcanic ash erupted during the 1912 Novarupta-Katmai eruption and carried it to the northwest today. No ash has been observed in cloudy satellite data, but pilot reports have confirmed a resuspended ash cloud below an altitude of 4,000 feet and extending to the east of King Salmon. This phenomenon is not the result of recent volcanic activity and occurs during times of high winds and dry snow-free conditions in the Katmai area and other young volcanic areas of ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Low-level unrest continues. No activity observed in satellite data.

USGS Volcano Current Alerts - Sat, 10/27/2018 - 16:32
Oct 27, 2018 20:14 - Low-level unrest continues at Great Sitkin volcano. Seismicity remains above background levels. No activity was observed in regional infrasound data or in mostly cloudy satellite images during 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. No activity observed in monitoring data.

USGS Volcano Current Alerts - Sat, 10/27/2018 - 16:32
Oct 27, 2018 20:14 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic and regional infrasound data. No activity observed in mostly cloudy satellite views of the volcano over the past day. 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 ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Eruption continues. Small explosions detected. No ash cloud observed in satellite.

USGS Volcano Current Alerts - Sat, 10/27/2018 - 16:32
Oct 27, 2018 20:14 - The eruption continues at Semisopochnoi volcano. Over the past day, small explosions were detected in seismic data, the largest of which occurred at 5:10, 6:46, 8:57 and 14:03 UTC. No ash clouds were observed in satellite images but the volcano was obscured by high meteorological clouds with altitudes that ranged from 15,000 to greater than 25,000 ft. Additional explosions are possible and will likely occur without warning. Semisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island ...
Categories: Volcano Reports

AVO Veniaminof ORANGE/WATCH - Eruption continues. Lava flow and diffuse ash emissions.

USGS Volcano Current Alerts - Sat, 10/27/2018 - 16:32
Oct 27, 2018 20:14 - The eruption continues at Veniaminof volcano and is characterized by minor lava spattering and effusion of a lava flow from the cone in the ice-filled summit caldera. Seismicity consists of low-amplitude continuous tremor and satellite views of the volcano showed elevated surface temperatures from the active lava effusion. Diffuse ash emissions were observed in web camera images at times over the past day and the resulting plume typically dissipates rapidly. Ash emissions are typically not accompanied by an increase in seismic tremor and trace ashfall is possible in ...
Categories: Volcano Reports

AVO Great Sitkin YELLOW/ADVISORY - Low-level unrest continues. Seismic activity slightly elevated.

USGS Volcano Current Alerts - Fri, 10/26/2018 - 18:32
Oct 26, 2018 22:04 - Low-level unrest continues at Great Sitkin Volcano. Seismicity remains elevated with small earthquakes occurring at rates slightly above background levels. No 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 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, ...
Categories: Volcano Reports

AVO Cleveland YELLOW/ADVISORY - Unrest continues. Seismicity low.

USGS Volcano Current Alerts - Fri, 10/26/2018 - 18:32
Oct 26, 2018 22:04 - Nothing significant was detected in seismic or infrasound (pressure) sensor data this week. No activity was observed in partly cloudy to mostly cloudy satellite views of the volcano 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 detect precursory unrest that may ...
Categories: Volcano Reports

AVO Semisopochnoi ORANGE/WATCH - Low-level eruptive activity. Alert level raised to Orange/Watch

USGS Volcano Current Alerts - Fri, 10/26/2018 - 18:32
Oct 26, 2018 22:04 - An eruptive event was detected in seismic data beginning at 4:47 UTC on October 26 (20:47 AKDT on October 25) and the Aviation Color Code was increased to Orange and the Volcano Alert Level to Watch as a result. This event was characterized by strong volcanic tremor that lasted for about 20 minutes, followed by about 40 minutes of weaker tremor pulses. The event also produced weak infrasound (pressure wave) that was detected by instruments on Adak Island. A thick meteorological cloud deck obscured observations below 10,000 ft asl and a very faint cloud was observed ...
Categories: Volcano Reports

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