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Updated:  17/05/2024 08:00 
 


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Volcano Alerts and Activity Reports

Provided by usgs.gov Recent Volcano Observatory Activity Reports
Recent Volcano Observatory Activity Reports

Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program

May 17th, 2024 03:14:08 EDT -0400 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava continues. Occasional small earthquakes detected.
May 16, 2024 19:35 - The slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Minor seismic activity was observed over the past day with occasional small earthquakes detected. The active portion of the lava flow remains warm and was snow-free and steaming in partly cloudy satellite views.The current lava flow began erupting in July 2021. No explosive events have occurred since a single event in May 2021.Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin along with regional infrasound and lightning networks and satellite data.
May 17th, 2024 03:14:08 EDT -0400 AVO Shishaldin YELLOW/ADVISORY - Low-level unrest continues. Minor steaming and elevated seismicity observed.
May 16, 2024 19:35 - Unrest at Shishaldin Volcano continues. Elevated seismicity continues with low-level volcanic tremor and earthquake activity observed over the past day. Minor steaming was observed in mostly cloudy satellite imagery.The last significant ash-producing eruption occurred in November 2023. Local seismic and infrasound sensors, web cameras, and a geodetic network are used to monitor Shishaldin Volcano. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.
May 17th, 2024 03:14:08 EDT -0400 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Heightened activity continues beneath the summit and ...
May 16, 2024 18:48 - Activity Summary: Kilauea volcano is not erupting. Unrest continues beneath Halemaʻumaʻu, the south caldera, and the upper East Rift Zone.Summit Observations and Upper East Rift Zone Observations: Earthquake counts remain slightly above background levels, but seismicity is reduced from last week. Over the past day, earthquakes have clustered below the summit and upper East Rift Zone. Earthquake depths have averaged 1–3 km (0.6–1.8 miles) beneath the surface, and magnitudes have been mostly below M2.0.Ground deformation continues beneath Halemaʻumaʻu and the ...
May 17th, 2024 03:14:08 EDT -0400 AVO Spurr GREEN/NORMAL - Small increase in volcano seismic activity and minor ground uplift detected at Mount Spurr. No ...
May 15, 2024 22:09 - Summary of Current ActivityThe Alaska Volcano Observatory (AVO) has detected a small increase in volcano seismic activity at Mount Spurr, which may indicate an intrusion of new magma deep beneath the volcano. An extended recent outage of the local seismic network from February to April 2024 limits precise determination of the onset of this activity, but elevated seismicity has been seen since the network returned on April 3. Since then, AVO has located an average of four earthquakes per day, with a peak of 33 recorded on April 26. These have typically been smaller than ...
May 17th, 2024 03:14:08 EDT -0400 CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week.
May 14, 2024 17:26 - Monitored CALIFORNIA VOLCANOESCurrent Volcano Alert Level: all NORMALCurrent Aviation Color Code: all GREENActivity Update: All volcanoes monitored by CalVO show normal background earthquake activity and ground movement. Monitored volcanoes include Mount Shasta, Medicine Lake Volcano, Lassen Volcanic Center, Clear Lake Volcanic Field, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes.Past Week Observations for May 6, 2024 (0000h PDT) to May 12, 2024 (2359h PDT)One earthquake greater than M1 was recorded near Lassen Volcanic Center, with ...
May 17th, 2024 03:14:08 EDT -0400 AVO Fisher GREEN/NORMAL - Aviation Color Code and Volcano Alert Level are changed to GREEN/NORMAL
May 13, 2024 23:43 - The Alaska Volcano Observatory (AVO) has reestablished real-time data from seismic monitoring instruments near Fisher volcano and can now confidently monitor seismic unrest at the volcano. With renewed seismic monitoring, the volcano moves from UNASSIGNED to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to monitor seismic, satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity.
May 17th, 2024 03:14:08 EDT -0400 AVO Westdahl GREEN/NORMAL - Aviation Color Code and Volcano Alert Level are changed to GREEN/NORMAL
May 13, 2024 23:43 - The Alaska Volcano Observatory (AVO) has reestablished real-time data from seismic monitoring instruments at Westdahl volcano and can now confidently monitor seismic unrest at the volcano. With renewed seismic monitoring, the volcano moves from UNASSIGNED to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to monitor seismic, satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity.
May 17th, 2024 03:14:08 EDT -0400 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
May 10, 2024 20:03 - Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background activity levels. 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.Past Week Observations: During the past week, small earthquakes were detected at Mount Baker, Mount Rainier, and Mount St. Helens. All monitoring data are consistent with background activity levels in the Cascades Range.
May 17th, 2024 03:14:08 EDT -0400 HVO Ofu-Olosega GREEN/NORMAL - No activity of concern for Ofu-Olosega.
May 3, 2024 04:45 - No significant activity was detected at Ofu-Olosega Volcano during the past month. The USGS National Earthquake Information Center reported no earthquakes of magnitude 2.5 or greater in the vicinity of the volcano.
May 17th, 2024 03:14:08 EDT -0400 HVO Ta'u Island GREEN/NORMAL - No activity of concern for Taʻū Island
May 3, 2024 04:45 - No significant activity was detected at Taʻū Volcano during the past month. The USGS National Earthquake Information Center reported no earthquakes of magnitude 2.5 or greater in the vicinity of the volcano. Global Positioning System (GPS) instrument on Taʻū Island recorded no significant vertical deformation.
May 17th, 2024 03:14:08 EDT -0400 HVO Tutuila Island GREEN/NORMAL - No activity of concern for Tutuila Island
May 3, 2024 04:45 - No significant activity was detected at Tutuila Volcano during the past month. The USGS National Earthquake Information Center reported no earthquakes of magnitude 2.5 or greater in the vicinity of the volcano.
May 17th, 2024 03:14:08 EDT -0400 HVO Mauna Loa GREEN/NORMAL - No significant changes at Mauna Loa in the past month; minor inflation of the summit ...
May 2, 2024 18:52 - Seismicity beneath Mauna Loa's summit and upper-elevation flanks has been low over the past month; approximately 47 small-magnitude earthquakes (below M2.5) were detected, which is expected for the post-eruption phase of this volcano. There were approximately 5 earthquakes deeper than 13 km (8 mi).Data from Global Positioning System (GPS) instruments on Mauna Loa, record a very slight inflationary trend near the summit as the volcano recovers from the 2022 eruption, and magma replenishes the reservoir system. Gas and temperature data from a station on Mauna Loa's ...
May 17th, 2024 03:14:08 EDT -0400 HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - No activity of concern for Kamaʻehuakanaloa.
May 2, 2024 18:52 - No significant activity was detected at Kamaʻehuakanaloa volcano (formerly Lōʻihi Seamount) during the past month. Seismic activity remained low and was representative of background activity levels at the volcano; all earthquakes were of small magnitudes (below M3.0).
May 17th, 2024 03:14:08 EDT -0400 HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai.
May 2, 2024 18:52 - No significant activity was detected at Hualālai volcano during the past month. Seismic activity remained low, and was representative of background activity levels at the volcano; all earthquakes were of small magnitudes (below M3.0). The continuously recording Global Positioning System (GPS) instrument on Hualālai recorded no significant deformation in the past month.
May 17th, 2024 03:14:08 EDT -0400 HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā.
May 2, 2024 18:52 - No significant activity was detected at Haleakalā volcano during the past month. HVO seismometers recorded no earthquakes in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) instrument on Haleakalā was offline for all of February and remains offline but no changes are suspected.

 

Volcano Alert Levels
NORMAL
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
ADVISORY
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
WATCH
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.
WARNING
Hazardous eruption is imminent, underway, or suspected.
UNASSIGNED

 

Aviation Alert Color Codes ICAO
GREEN
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
YELLOW
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
ORANGE
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].
RED
Eruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].