Volcano Alerts and Activity Reports
Provided by usgs.govRecent Volcano Observatory Activity Reports |
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Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program |
December 23rd, 2024 05:30:17 EST -0500 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava, accompanied by small earthquakes, continues. Steaming visible in satellite imagery. Dec 22, 2024 19:12 - Lava continues to erupt slowly at Great Sitkin Volcano, and small earthquakes associated with this ongoing eruption continue at a low rate. Steaming was observed from the summit through a veil of high clouds in satellite images. Webcam views were cloudy. The current eruption of Great Sitkin Volcano began with a single explosive event in May 2021. The ongoing eruption of lava at the summit began shortly afterward, in July 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data and web cameras, and regional infrasound and lightning ... |
December 23rd, 2024 05:30:17 EST -0500 AVO Spurr YELLOW/ADVISORY - Unrest continues with elevated seismicity. Dec 22, 2024 19:12 - Unrest continues at Mount Spurr with small earthquakes underneath the summit region continuing at a low rate. No activity was observed in cloudy webcam and satellite 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 were to ... |
December 23rd, 2024 05:30:17 EST -0500 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Seismic activity at Kīlauea has been low over the past 24 hours. Steady summit inflation continues. Dec 22, 2024 18:39 - Activity Summary: Kīlauea volcano is not erupting. Continued summit inflation and recent increased seismic activity suggests an increasing amount of magma is being stored underneath the summit area. Summit Observations: Seismicity at the summit over the last 24 hours has been low with approximately 23 earthquakes, all below magnitude-2.0. Since the September eruption in the East Rift Zone, there have been sustained rates of inflation at the summit. The most recent measurement of the sulfur dioxide (SO2) emission rate from the summit was approximately 70 tonnes per day on ... |
December 23rd, 2024 05:30:17 EST -0500 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels. Dec 20, 2024 22:20 - 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, monitoring data were consistent with background activity levels in the Cascades Range. Small earthquakes were detected at Mount Rainier, Mount St. Helens, Mount Hood, and Newberry. |
December 23rd, 2024 05:30:17 EST -0500 NMI Ahyi Seamount YELLOW/ADVISORY - Weak actvity observed over the past week with a plume of discolored water observed over Ahyi seamount on December 15. Dec 20, 2024 00:50 - No significant signals have been detected over the past week from the direction of Ahyi seamount in hydroacoustic array data at Wake Island. A plume of discolored water was observed over Ahyi Seamount in satellite data on December 15. Weak activity at Ahyi Seamount has been observed in satellite imagery off an on extending back to August 5, 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 satellite and distal hydroacoustic data closely for additional ... |
December 23rd, 2024 05:30:17 EST -0500 CVO Newberry GREEN/NORMAL - Renewed geothermal work at Newberry volcano will cause small, non-volcanic earthquakes. It should not impact the volcano’s state of activity. Dec 18, 2024 21:47 - Newberry volcano is currently at normal/background levels of activity. Beginning on December 22, 2024, and continuing intermittently for several weeks to months, private exploration company Mazama Energy will conduct geothermal exploration work near Newberry volcano. As their geothermal work proceeds, many small magnitude, non-volcanic earthquakes will occur, which will be detected by the Newberry seismic network. Any increased rates of seismicity will be closely monitored by the U.S. Geological Survey Cascades Volcano Observatory (CVO) and its monitoring partner, the ... |
December 23rd, 2024 05:30:17 EST -0500 CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week. Dec 17, 2024 16:51 - 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 December 09 (0000h PST) to December 15 (2359h PST) One earthquake greater than M1 was recorded near Mount Shasta, with a ... |
December 23rd, 2024 05:30:17 EST -0500 HVO Ofu-Olosega GREEN/NORMAL - No activity of concern for Ofu-Olosega. Dec 5, 2024 20:25 - 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. |
December 23rd, 2024 05:30:17 EST -0500 HVO Ta'u Island GREEN/NORMAL - No activity of concern for Taʻū Island Dec 5, 2024 20:25 - 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. |
December 23rd, 2024 05:30:17 EST -0500 HVO Tutuila Island GREEN/NORMAL - No activity of concern for Tutuila Island Dec 5, 2024 20:25 - 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. |
December 23rd, 2024 05:30:17 EST -0500 HVO Mauna Loa GREEN/NORMAL - No significant changes at Mauna Loa in the past month; slow inflation of the summit continues. Dec 5, 2024 20:06 - Seismicity beneath Mauna Loa's summit and upper-elevation flanks has been low over the past month; approximately 60 small-magnitude earthquakes (most below M1.5) were detected, which is expected for the post-eruption phase of this volcano and similar to the previous month. There were approximately 6 earthquakes deeper than 10 km (8 mi).Data from Global Positioning System (GPS) instruments on Mauna Loa showed only continued minor inflation near the summit as the volcano recovers from the 2022 eruption and magma replenishes the reservoir system. Gas and temperature data from ... |
December 23rd, 2024 05:30:17 EST -0500 HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - No activity of concern for Kamaʻehuakanaloa. Dec 5, 2024 20:06 - Seismicity was elevated very early in November at Kamaʻehuakanaloa volcano (formerly Lōʻihi Seamount), but activity has since returned to low levels. There have been about 25 earthquakes in the past month, which is representative of background activity at the volcano; all earthquakes were of small magnitudes (below M3.0). |
December 23rd, 2024 05:30:17 EST -0500 HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai. Dec 5, 2024 20:06 - 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; 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. |
December 23rd, 2024 05:30:17 EST -0500 HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā. Dec 5, 2024 20:06 - 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. |
December 23rd, 2024 05:30:17 EST -0500 HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea. Dec 5, 2024 20:06 - 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. |
Volcano Alert Levels |
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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 |
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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]. |