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Porth, Newquay, Cornwall. UK
Updated:  21/12/2024 16:30 
 


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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

December 21st, 2024 11:39:50 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 21st, 2024 11:39:50 EST -0500 AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava within the summit crater continues, accompanied by occasional small earthquakes.
Dec 20, 2024 20:17 - Activity at Great Sitkin volcano has remained unchanged over the past week, with lava continuing to erupt at a slow rate in the summit crater. Intermittent, small volcanic earthquakes continue at a low rate. Steam emissions, warm temperatures and snow-free areas were observed at the summit in satellite imagery. Minor steam emissions were also observed in webcam views. Since the May 2021 explosion, there have been no other explosions at Great Sitkin Volcano. The lava eruption that began in July 2021 is ongoing. It has filled most of the summit crater and advanced into ...
December 21st, 2024 11:39:50 EST -0500 AVO Spurr YELLOW/ADVISORY - Seismic unrest continues. No unusual activity was observed in mostly cloudy satellite and web camera views this week.
Dec 20, 2024 20:17 - Unrest persists at Mount Spurr with small, shallow earthquakes beneath the summit continuing over the past week. An AVO crew conducted an overflight of Mount Spurr on Wednesday, December 18. Gas measurements yielded similar results to those obtained on a flight on June 23, 2024, and remain consistent with typical background values. A lake that formed in the summit crater during the summer has grown indicating continued heat flow through the summit cone causing minor ice and snow melt. No other activity was observed in satellite or webcam images throughout the week. AVO ...
December 21st, 2024 11:39:50 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 20, 2024 18:42 - 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 6 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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 21st, 2024 11:39:50 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
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].