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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

November 14th, 2024 21:22:19 EST -0500 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava, accompanied by small earthquakes, continues.
Nov 14, 2024 20:51 - Lava continues to erupt slowly at Great Sitkin Volcano, adding to a thick lava flow that fills most of the summit crater. Satellite radar images between November 3 and 14 show continued slow eruption and advance of the lava flow lobe near the vent region. Small earthquakes associated with the ongoing lava eruption continue at a low rate. Clouds obscured the volcano in thermal infrared satellite and web camera images over the past day. A single explosive event occurred in May 2021 and was followed by the ongoing eruption of lava that began in July 2021. Local seismic and ...
November 14th, 2024 21:22:19 EST -0500 AVO Spurr YELLOW/ADVISORY - Unrest continues with elevated seismicity.
Nov 14, 2024 20:51 - Unrest continues at Mount Spurr. The number of shallow earthquakes underneath the summit region remains above background. No activity was observed in satellite and web camera views over the past day. AVO continues to closely monitor activity at Mount Spurr for signals that would indicate that the volcano is moving closer to an eruption. Based on previous eruptions, changes from current activity in the earthquakes, ground deformation, summit lake, and fumaroles would be expected if magma began to move closer to the surface. Therefore, it is very likely that if an eruption ...
November 14th, 2024 21:22:19 EST -0500 CALVO GREEN/NORMAL - [CORRECTED DATE] CA volcanoes were at normal background levels of seismicity and deformation during the past week.
Nov 12, 2024 20:43 - 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.CORRECT DATE: Past Week Observations for November 04 (0000h PST) to November 10 (2359h PST) One earthquake greater than M1 was recorded near the Lassen ...
November 14th, 2024 21:22:19 EST -0500 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Activity on Kīlauea remains low.
Nov 12, 2024 20:17 - Activity Summary: Kīlauea volcano is not erupting. Seismicity and ground deformation at the volcano’s summit, East Rift Zone, and Southwest Rift Zone are low.Summit Observations:  Earthquake activity at Kīlauea's summit region remained low over the past week, with 19 earthquakes magnitude-2.2 or smaller. The tiltmeter at Uēkahuna, northwest of Kaluapele, the summit caldera, remained relatively flat with no significant changes over the past week. The tiltmeter at Sand Hill, southwest of Kaluapele, continues to show slow inflation (about 2 microradians over the past ...
November 14th, 2024 21:22:19 EST -0500 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
Nov 8, 2024 19:25 - 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 St. Helens, Mount Rainier, and Mount Adams. All monitoring data are consistent with background activity levels in the Cascade Range.
November 14th, 2024 21:22:19 EST -0500 HVO Ofu-Olosega GREEN/NORMAL - No activity of concern for Ofu-Olosega.
Nov 7, 2024 21:24 - 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.
November 14th, 2024 21:22:19 EST -0500 HVO Ta'u Island GREEN/NORMAL - No activity of concern for Taʻū Island
Nov 7, 2024 21:24 - 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.
November 14th, 2024 21:22:19 EST -0500 HVO Tutuila Island GREEN/NORMAL - No activity of concern for Tutuila Island
Nov 7, 2024 21:24 - 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.
November 14th, 2024 21:22:19 EST -0500 HVO Mauna Loa GREEN/NORMAL - No significant changes at Mauna Loa in the past month; slow inflation of the summit continues.
Nov 7, 2024 21:07 - Seismicity beneath Mauna Loa's summit and upper-elevation flanks has been low over the past month; approximately 61 small-magnitude earthquakes (most below M1.5) were detected, which is expected for the post-eruption phase of this volcano. There were approximately 5 earthquakes deeper than 10 km (8 mi).Data from Global Positioning System (GPS) instruments on Mauna Loa showed no change 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 Southwest Rift Zone show ...
November 14th, 2024 21:22:19 EST -0500 HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - No activity of concern for Kamaʻehuakanaloa.
Nov 7, 2024 21:07 - Seismicity was elevated in the past month reflecting an earthquake swarm beginning on Nov. 1, 2024 at Kamaʻehuakanaloa volcano (formerly Lōʻihi Seamount). There have been 110 earthquakes since the start of this swarm with activity appearing to wane on Nov. 5, 2024; 48 earthquakes within the swarm were greater than magnitude 2 and 1 event was greater than magnitude 4. The largest earthquake to occur was a magnitude 4.3 at 12:05pm HST on Nov. 2, at a depth of 5.8 km (3.6 mi) below sea level. The source of this seismicity is likely related to magma migration beneath ...
November 14th, 2024 21:22:19 EST -0500 HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai.
Nov 7, 2024 21:07 - 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; most earthquakes were of small magnitudes (below M1.5). The continuously recording Global Positioning System (GPS) instrument on Hualālai recorded no significant deformation in the past month.
November 14th, 2024 21:22:19 EST -0500 HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā.
Nov 7, 2024 21:07 - No significant activity was detected at Haleakalā volcano during the past month. Seismic activity remained low, and was representative of background activity levels at the volcano. The continuously recording Global Positioning System (GPS) instrument on Haleakalā shows no significant changes.
November 14th, 2024 21:22:19 EST -0500 HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea.
Nov 7, 2024 21:07 - No significant activity was detected at Mauna Kea volcano during the past month. Seismic activity was at background levels at the volcano. The continuously recording Global Positioning System (GPS) instrument on Mauna Kea (MKPM, operated by NASA’s Jet Propulsion Laboratory) showed no change.
November 14th, 2024 21:22:19 EST -0500 YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation
Nov 1, 2024 15:11 - SummaryYellowstone Caldera activity remains at background levels, with 70 located earthquakes in October (maximum = M2.0). Deformation measurements indicate a resumption of subsidence after the seasonal pause that occurs every summer due to snowmelt and groundwater conditions. Recent Work and NewsSteamboat Geyser erupted on October 7, the 5th major eruption of the year. Since that time, the geyser has not experienced significant minor activity, indicating that the next major eruption is at least many weeks, and perhaps months, away.Yellowstone Volcano Observatory ...
November 14th, 2024 21:22:19 EST -0500 AVO Katmai GREEN/NORMAL - Resuspended ash was detected in the Katmai area on October 19. No eruption occurred.
Oct 25, 2024 20:15 - On October 19, strong northwesterly winds near Katmai and the Valley of Ten Thousand Smokes picked up loose volcanic ash from the 1912 Novarupta-Katmai eruption and carried it southeast. The National Weather Service issued a SIGMET for this low-level event and suggested that the maximum cloud height is 6,000 ft (1.8 km) above sea level. Residents reported hazy skies and a dusting of ashfall in the city of Kodiak.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 ...

 

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].