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Updated08/08/2026 10:45 
 




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

August 8th, 2026 05:46:01 EDT -0400 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Inflation models indicate another episode is likely with the current forecast between August 8 and 12.
Aug 7, 2026 21:26 - Overview:The summit eruption of Kīlauea in Halemaʻumaʻu remains paused. Very slight, infrequent spatter was observed overnight within the north vent. Moderate to strong glow persisted at the north and south vents, while weak, intermittent glow was observed from the recently opened crack upslope of the south vent. Occasional small flames were detected, primarily at the south vent and less frequently at the north vent; neither flames nor spatter were associated with gas pistoning. This morning tilt meters began recording a deflationary trend, the second of this repose ...
August 8th, 2026 05:46:01 EDT -0400 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava continues within the summit crater associated with low-level seismicity.
Aug 7, 2026 19:12 - Lava continues to erupt slowly within the summit crater. A GNSS sensor on the northwest shore of the island continues to record deflation, consistent with pressure reduction at depth because of lava eruption at the summit. Satellite data shows that the lava dome is gradually expanding toward the east-southeast and slightly elevated surface temperatures were observed when cloud cover did not obscure the volcano. Seismic activity remains low, with only occasional small volcanic earthquakes and seismic signals associated with minor rockfalls detected.The current lava eruption ...
August 8th, 2026 05:46:01 EDT -0400 AVO Kupreanof YELLOW/ADVISORY - Low-level unrest continues at Mount Kupreanof this week.
Aug 7, 2026 19:12 - Low-level unrest continues at Mount Kupreanof. Earthquakes continue at a low rate. Robust steam emissions from the fumarole field on the southwest flank of Kupreanof were observed in web camera images and emissions of sulfur dioxide gas were observed in satellite data this past week. A new temporary monitoring station was installed recently near Mount Kupreanof and is providing seismic data, infrasound data, gas measurements, and web camera images on an intermittent basis. This is by design to conserve battery power, but the frequency of data acquisition can be increased ...
August 8th, 2026 05:46:01 EDT -0400 AVO Shishaldin YELLOW/ADVISORY - Unrest continues with small earthquakes, tremor, infrasound signals and gas emissions detected.
Aug 7, 2026 19:12 - Seismic and infrasound activity remain elevated, characterized by numerous small earthquakes, persistent tremor, and frequent infrasound signals generated by small explosions within the volcanic conduit. During periods of clear weather, a robust a steam plume was observed in web camera and satellite images and sulfur dioxide gas emissions continue to be observed in satellite data.Shishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, the Alaska Volcano ...
August 8th, 2026 05:46:01 EDT -0400 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
Aug 7, 2026 15:31 - 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 Cascade Range.
August 8th, 2026 05:46:01 EDT -0400 HVO Ofu-Olosega GREEN/NORMAL - No activity of concern for Ofu-Olosega.
Aug 7, 2026 01:12 - 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.
August 8th, 2026 05:46:01 EDT -0400 HVO Ta'u Island GREEN/NORMAL - No activity of concern for Taʻū Island
Aug 7, 2026 01:12 - 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. A Global Positioning System (GPS) instrument on Taʻū Island recorded no significant deformation.The FAGA broadband seismometer located on eastern Taʻū Island is currently out of service. The TAU broadband seismometer on western Taʻū Island remains operational.
August 8th, 2026 05:46:01 EDT -0400 HVO Tutuila Island GREEN/NORMAL - No activity of concern for Tutuila Island
Aug 7, 2026 01:12 - 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.
August 8th, 2026 05:46:01 EDT -0400 HVO Mauna Loa GREEN/NORMAL - Mauna Loa earthquake counts decreased in July, while the summit region showed patterns of slight inflation.
Aug 7, 2026 01:06 - Mauna Loa had a decrease in seismic activity compared to the previous month; a total of 57 earthquakes were detected in Mauna Loa's summit region during the July reporting period, after 94 in June. Most earthquakes occurred deep beneath the upper Southwest Rift Zone or broadly scattered around the upper flanks. Very few earthquakes occurred directly beneath Mokuʻāweoweo.Data from Global Positioning System (GPS) instruments on Mauna Loa showed slight inflation across the summit region in the past month. Most GPS stations at the summit recorded small upward vertical ...
August 8th, 2026 05:46:01 EDT -0400 HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai.
Aug 7, 2026 01:06 - 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. The continuously recording Global Positioning System (GPS) instrument on Hualālai has been offline since March 15, 2026; HVO field engineers will service the station within the next few months to bring it back online.
August 8th, 2026 05:46:01 EDT -0400 HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā.
Aug 7, 2026 01:06 - No significant activity was detected at Haleakalā volcano during the past month. HVO seismometers recorded one earthquake in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) instrument on Haleakalā lost connection on July 13th. No significant deformation was recorded leading up to the outage. The station is owned and operated by researchers at the Pacific GPS Facility (PGF), as part of the Hawaii Institute of Geophysics and Planetology (HIGP), who will service the station within the next few months to bring it back online.
August 8th, 2026 05:46:01 EDT -0400 HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea.
Aug 7, 2026 01:06 - 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. The continuously recording Global Positioning System (GPS) instrument on Mauna Kea, operated by NASA's Jet Propulsion Laboratory, recorded no significant deformation in the past month.
August 8th, 2026 05:46:01 EDT -0400 HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - No activity of concern for Kamaʻehuakanaloa.
Aug 7, 2026 01:06 - 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.
August 8th, 2026 05:46:01 EDT -0400 NMI Ahyi Seamount YELLOW/ADVISORY - No underwater plumes observed in satellite images or in distal geophysical data this past week.
Aug 6, 2026 20:28 - There were several clear satellite images of the ocean over Ahyi Seamount this past week, but there were no observations of underwater plumes. Distal geophysical monitoring showed no evidence of activity. Eruptive activity at Ahyi Seamount may present a hazard to mariners in the water above and near the volcano. The summit has shallowed over the course of previous eruptions to 180 feet (55 m) below sea level, but the lack of local real-time data means we are unable to forecast or warn of impending eruptions. We will continue to monitor satellite and distal hydroacoustic ...
August 8th, 2026 05:46:01 EDT -0400 CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week.
Aug 4, 2026 15:55 - 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 deformation. 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 July 27 (0000h PDT) to August 02 (2359h PDT):Typical seismicity was recorded at The Geysers geothermal field south of the Clear Lake ...

 

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].