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Updated:  26/04/2024 13:45 
 


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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

April 26th, 2024 08:47:01 EDT -0400 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Heightened levels of unrest continue beneath the summit ...
Apr 25, 2024 20:23 - Activity Summary:  Kīlauea volcano is not erupting. Increased seismicity over the past month indicates heightened activity beneath the summit of Kīlauea. Shallow earthquakes have also been observed beneath the upper East Rift Zone over the past two days. Updates will be provided daily while at a heightened state of unrest.Summit Observations:  Earthquake activity has increased over the past month beneath the summit of Kīlauea and south of the caldera. Activity has alternated between typical shallow, 0.5-2.5 miles (1-4 km) earthquakes beneath the south caldera ...
April 26th, 2024 08:47:01 EDT -0400 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava continues. Seismicity is low.
Apr 25, 2024 19:45 - The slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismic activity has been low over the past day. Nothing unusual was observed in cloudy satellite and webcam 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.
April 26th, 2024 08:47:01 EDT -0400 AVO Shishaldin YELLOW/ADVISORY - Weak seismicity detected over the past day.
Apr 25, 2024 19:45 - Unrest at Shishaldin Volcano continues, with occasional small earthquakes recorded over the past day. Satellite and web camera views were obscured by clouds over the past day.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.
April 26th, 2024 08:47:01 EDT -0400 CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week.
Apr 24, 2024 12:48 - 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 April 15, 2024 (0000h PDT) to April 21, 2024 (2359h PDT)One earthquake greater than M1 was recorded near the Lassen Volcanic ...
April 26th, 2024 08:47:01 EDT -0400 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
Apr 19, 2024 21:35 - 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 Rainier, Mount St. Helens, and Mount Hood. All monitoring data are consistent with background activity levels in the Cascades Range.
April 26th, 2024 08:47:01 EDT -0400 NMI Ahyi Seamount UNASSIGNED/UNASSIGNED - Nothing noteworthy was observed in the vicinity of Ahyi seamount.
Apr 11, 2024 23:06 - No activity was observed in satellite views of the Ahyi Seamount area over the past week. Likewise, AVO received no definitive hydroacoustic detections of submarine volcanic activity. Because of the apparent lack of activity, the Aviation Color Code and Volcano Alert Level for Ahyi Seamount were lowered to UNASSIGNED on April 9, 2024.There are no local monitoring stations near Ahyi Seamount, which limits our ability to detect and characterize volcanic unrest there. We will continue to monitor available remote underwater pressure sensors, and seismic and satellite data ...
April 26th, 2024 08:47:01 EDT -0400 AVO Atka volcanic complex GREEN/NORMAL - Activity has returned to background levels; Aviation Color Code and Alert ...
Apr 9, 2024 15:34 - Volcanic activity at the Atka volcanic complex has decreased since a small explosion was detected from the summit crater of Korovin, one of several volcanoes there, on March 27 (AKDT). Although occasional small earthquakes and weak volcanic tremor continue to be observed, the current activity is at background levels. Due to this decrease in activity, the Alaska Volcano Observatory is lowering the Aviation Color Code and Volcano Alert Level to GREEN/NORMAL.
April 26th, 2024 08:47:01 EDT -0400 AVO Spurr GREEN/NORMAL - Conditions at Mount Spurr volcano have improved and AVO is receiving data from earthquake and ...
Apr 5, 2024 00:30 - Conditions at Mount Spurr volcano have improved and AVO is receiving data from earthquake monitoring stations and a remote web camera at the volcano 120 km (75 miles) west of Anchorage. Data are now sufficient to establish the state of the volcano. As a result, the Aviation Color Code and Volcano Alert Level are changed to GREEN/NORMAL. Summary A thick winter snowpack prevented data transmission from seismic stations on Mount Spurr volcano to AVO in Anchorage. Conditions on the volcano have improved recently. In addition, following work at the Anchorage receive facility ...
April 26th, 2024 08:47:01 EDT -0400 HVO Mauna Loa GREEN/NORMAL - No significant changes at Mauna Loa in the past month; inflation of the summit continues.
Apr 4, 2024 18:20 - Seismicity beneath Mauna Loa's summit and upper-elevation flanks has been relatively low over the past month; approximately 31 small-magnitude earthquakes (below M3.0) were detected, which is expected for the post-eruption phase of this volcano. There were approximately 12 earthquakes deeper than 8 mi (13 km).Data from Global Positioning System (GPS) instruments on Mauna Loa, record a very slight inflationary trend as the volcano recovers from the 2022 eruption, and magma begins to replenish the reservoir system. Gas and temperature data from a station on Mauna Loa' ...
April 26th, 2024 08:47:01 EDT -0400 HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - No activity of concern for Kamaʻehuakanaloa.
Apr 4, 2024 18:20 - 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).
April 26th, 2024 08:47:01 EDT -0400 HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai.
Apr 4, 2024 18:20 - 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.
April 26th, 2024 08:47:01 EDT -0400 HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā.
Apr 4, 2024 18:20 - 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.
April 26th, 2024 08:47:01 EDT -0400 HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea.
Apr 4, 2024 18:20 - No significant activity was detected at Mauna Kea 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 Mauna Kea (MKPM, operated by NASA’s Jet Propulsion Laboratory) recorded no significant deformation in the past month.
April 26th, 2024 08:47:01 EDT -0400 HVO Ofu-Olosega GREEN/NORMAL - No activity of concern for Ofu-Olosega.
Apr 4, 2024 18:08 - 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.
April 26th, 2024 08:47:01 EDT -0400 HVO Ta'u Island GREEN/NORMAL - No activity of concern for Taʻū Island
Apr 4, 2024 18:08 - 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.

 

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].