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Updated:  05/05/2024 08:15 
 


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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 5th, 2024 03:26:39 EDT -0400 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Unrest has decreased to background levels beneath the ...
May 4, 2024 20:40 - Activity Summary:  Kīlauea volcano is not erupting. Seismicity has decreased significantly beneath the upper East Rift Zone, as has inflation in the caldera south of Halemaʻumaʻu. Summit and upper East Rift Zone Observations: Activity has slowed significantly in the past 24 hours. Earthquake counts have decreased significantly with approximately 75 earthquakes in this area in the past 24 hours and 7 in the past 8 hrs. Earthquake locations remain focused primarily from the southeast side of Kaluapele (Kīlauea caldera) beneath Keanakākoʻi crater extending to the ...
May 5th, 2024 03:26:39 EDT -0400 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava likely continues. Seismicity is low.
May 4, 2024 19:01 - The slow eruption of lava in the summit crater of Great Sitkin Volcano likely continues. Seismic activity has been low over the past day. Satellite and web camera observations were obscured by clouds. 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 5th, 2024 03:26:39 EDT -0400 AVO Shishaldin YELLOW/ADVISORY - Low-level unrest continues. Seismicity related to unrest continues to be observed.
May 4, 2024 19:01 - Unrest at Shishaldin Volcano continues, with occasional periods of volcanic tremor and intermittent earthquake activity observed over the past day. Minor steaming from the summit crater was observed in satellite and web camera images from yesterday afternoon. 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 ...
May 5th, 2024 03:26:39 EDT -0400 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
May 3, 2024 21:36 - 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.
May 5th, 2024 03:26:39 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 5th, 2024 03:26:39 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 5th, 2024 03:26:39 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 5th, 2024 03:26:39 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 5th, 2024 03:26:39 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 5th, 2024 03:26:39 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 5th, 2024 03:26:39 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.
May 5th, 2024 03:26:39 EDT -0400 HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea.
May 2, 2024 18:52 - 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.
May 5th, 2024 03:26:39 EDT -0400 YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation
May 1, 2024 15:56 - Recent Work and NewsSteamboat Geyser erupted on April 3—the second major water eruption of the geyser so far in 2024.May means the start of the field season in Yellowstone, and teams will be in the park setting up the seasonal semi-permanent GPS network and performing maintenance on continuous monitoring sites in the latter half of the month. During May 20-22, members of the Yellowstone Volcano Observatory consortium will also gather in Mammoth Hot Springs for the biennial coordination meeting, where they will share scientific results and discuss monitoring and research ...
May 5th, 2024 03:26:39 EDT -0400 CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week.
Apr 30, 2024 16:49 - 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 22, 2024 (0000h PDT) to April 28, 2024 (2359h PDT)Four earthquakes greater than M1 were recorded near the Lassen Volcanic ...
May 5th, 2024 03:26:39 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 ...

 

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].