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Porth, Newquay, Cornwall. UK
Updated:  24/08/2026 04:45 
 


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24 Aug 2026 00:00
 
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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

August 23rd, 2026 23:53:38 EDT -0400 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava within the summit crater continues.
Aug 23, 2026 20:02 - Slow eruption of lava within the summit crater continues. Minor earthquakes were detected over the past day, likely associated with rockfall on the growing dome. No activity was observed in cloudy satellite and webcam images over the past day. The current eruption began in July 2021. Since then, lava flows have filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, webcams, and regional ...
August 23rd, 2026 23:53:38 EDT -0400 AVO Kupreanof YELLOW/ADVISORY - Low-level seismic activity continued over the past day.
Aug 23, 2026 20:02 - Low-level earthquake activity continued over the past day. No activity was observed in satellite images.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 if activity warrants. The closest functioning seismometers that provide continuous data are approximately 10 miles (16 km) to the northeast of the volcano as part of the Mount ...
August 23rd, 2026 23:53:38 EDT -0400 AVO Shishaldin YELLOW/ADVISORY - Low-level seismic unrest continues.
Aug 23, 2026 20:02 - Unrest continues with minor seismic activity detected during the past day. No activity observed in partly cloudy satellite views over the past day. Minor steam emissions observed in web camera views.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 lightning data, and satellite images to detect eruptions.
August 23rd, 2026 23:53:38 EDT -0400 HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting; the summit eruption in Halemaʻumaʻu is paused. Data indicate the onset of the next fountaining episode is likely between August 24 and August 28.
Aug 23, 2026 19:20 - Overview:The summit eruption of Kīlauea in Halemaʻumaʻu is paused. Data from summit tiltmeters shows deflation continues this morning, following the pattern of deflationary steps observed before previous episodes. Glow was observed on webcams from the north and west vents overnight. Inflation models suggest that another episode is likely between Monday August 24 and Friday August 28.WARNING: NWS forecasts the nearby tropical storm system may cause potential torrential rains today and tomorrow. Overlap with an eruption may create extreme conditions not suitable for ...
August 23rd, 2026 23:53:38 EDT -0400 CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
Aug 21, 2026 23:42 - 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 and Mount St. Helens. All monitoring data are consistent with background activity levels in the Cascade Range. Field crews were out at Mount St. Helens and Glacier Peak.
August 23rd, 2026 23:53:38 EDT -0400 NMI Ahyi Seamount YELLOW/ADVISORY - No signs of unrest in satellite images or distal geophysical data this past week.
Aug 21, 2026 00:01 - No activity was observed in occasional clear satellite images or distal geophysical monitoring data over the past week.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 data for additional evidence for, or escalation of, volcanic activity.
August 23rd, 2026 23:53:38 EDT -0400 CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week.
Aug 18, 2026 17:28 - 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 August 10 (0000h PDT) to August 16 (2359h PDT):One earthquake greater than M1 was recorded near Mount Shasta, with a magnitude of ...
August 23rd, 2026 23:53:38 EDT -0400 AVO Iliamna GREEN/NORMAL - Large avalanche detected on eastern flank. No increase in volcanic unrest.
Aug 14, 2026 21:05 - A large rock and ice avalanche on the eastern flank of Iliamna Volcano was detected by seismic and infrasound sensors at 07:57 AKDT (15:57 UTC) on Saturday, August 8. The source area of the avalanche was also visible in web camera data. Large avalanches are common at this volcano, and the event does not indicate volcanic unrest. Avalanches of similar size have been previously observed in 2016, 2019 and 2023.
August 23rd, 2026 23:53:38 EDT -0400 HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - Magnitude-5.2 earthquake on Tuesday, August 11, 5:48 p.m. HST, beneath Kama‘ehuakanaloa (Lō‘ihi seamount), 26 mi (42 km) east-southeast offshore of Nāʻālehu on the Island of Hawaiʻi at a depth of 7 mi (11 km) below sea level.
Aug 12, 2026 04:42 - HAWAIIAN VOLCANO OBSERVATORY INFORMATION STATEMENTOn Tuesday, August 11, 5:48 p.m. HST, a magnitude-5.2 earthquake occurred beneath Kamaʻehuakanaloa volcano 26 mi (42 km) east-southeast offshore of Nāʻālehu on the Island of Hawaiʻi at a depth of 7 mi (11 km) below sea level. The magnitude-5.2 earthquake is part of an ongoing sequence of earthquakes associated with unrest of Kamaʻehuakanaloa (formerly Lōʻihi) Seamount that started on Sunday, August 9. These earthquakes have no apparent impact on either Mauna Loa or Kīlauea volcanoes. The USGS Hawaiian Volcano ...
August 23rd, 2026 23:53:38 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 23rd, 2026 23:53:38 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 23rd, 2026 23:53:38 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 23rd, 2026 23:53:38 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 23rd, 2026 23:53:38 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 23rd, 2026 23:53:38 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.

 

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].