HVO Kilauea YELLOW/ADVISORY - Kīlauea volcano is not erupting. Heightened levels of unrest continue beneath the upper ...

Apr 28, 2024 20:08 - Activity Summary: Kīlauea volcano is not erupting. The significant increase in seismicity beneath the upper East Rift Zone and caldera south of Halemaʻumaʻu that began early yesterday is continuing with little change. Updates are being provided daily while the heightened state of unrest continues.Summit and upper East Rift Zone Observations: Earthquake activity increased sharply just after midnight on April 27 beneath the upper East Rift Zone (between Puhimau Crater and Hilina Pali road) and beneath Kīlauea caldera south of Halemaʻumaʻu. Earthquakes are occurring ...

AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava continues. Seismicity is low.

Apr 28, 2024 18:33 - The slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismic activity has been low over the past day. No unusual activity observed in partly cloudy satellite and web camera views.The current lava flow began erupting in July 2021. No explosive events have occurred since a single event in May 2021.Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin along with regional infrasound and lightning networks and satellite data.

AVO Shishaldin YELLOW/ADVISORY - Weak seismicity detected over the past day.

Apr 28, 2024 18:33 - Unrest at Shishaldin Volcano continues, with occasional small earthquakes recorded over the past day. No unusual activity observed in satellite views over the past day. Web camera views showed robust steam emissions.The last significant ash-producing eruption occurred in November 2023. 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 lighting data, and satellite images to detect eruptions.

CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.

Apr 26, 2024 19:46 - 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 Hood, Mount St. Helens, and Mount Rainier. All monitoring data are consistent with background activity levels in the Cascades Range.

CALVO GREEN/NORMAL - CA volcanoes were at normal background levels of seismicity and deformation during the past week.

Apr 24, 2024 12:48 - 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 April 15, 2024 (0000h PDT) to April 21, 2024 (2359h PDT)One earthquake greater than M1 was recorded near the Lassen Volcanic ...

NMI Ahyi Seamount UNASSIGNED/UNASSIGNED - Nothing noteworthy was observed in the vicinity of Ahyi seamount.

Apr 11, 2024 23:06 - No activity was observed in satellite views of the Ahyi Seamount area over the past week. Likewise, AVO received no definitive hydroacoustic detections of submarine volcanic activity. Because of the apparent lack of activity, the Aviation Color Code and Volcano Alert Level for Ahyi Seamount were lowered to UNASSIGNED on April 9, 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 available remote underwater pressure sensors, and seismic and satellite data ...

AVO Atka volcanic complex GREEN/NORMAL - Activity has returned to background levels; Aviation Color Code and Alert ...

Apr 9, 2024 15:34 - Volcanic activity at the Atka volcanic complex has decreased since a small explosion was detected from the summit crater of Korovin, one of several volcanoes there, on March 27 (AKDT). Although occasional small earthquakes and weak volcanic tremor continue to be observed, the current activity is at background levels. Due to this decrease in activity, the Alaska Volcano Observatory is lowering the Aviation Color Code and Volcano Alert Level to GREEN/NORMAL.

AVO Spurr GREEN/NORMAL - Conditions at Mount Spurr volcano have improved and AVO is receiving data from earthquake and ...

Apr 5, 2024 00:30 - Conditions at Mount Spurr volcano have improved and AVO is receiving data from earthquake monitoring stations and a remote web camera at the volcano 120 km (75 miles) west of Anchorage. Data are now sufficient to establish the state of the volcano. As a result, the Aviation Color Code and Volcano Alert Level are changed to GREEN/NORMAL. Summary A thick winter snowpack prevented data transmission from seismic stations on Mount Spurr volcano to AVO in Anchorage. Conditions on the volcano have improved recently. In addition, following work at the Anchorage receive facility ...

HVO Mauna Loa GREEN/NORMAL - No significant changes at Mauna Loa in the past month; inflation of the summit continues.

Apr 4, 2024 18:20 - Seismicity beneath Mauna Loa's summit and upper-elevation flanks has been relatively low over the past month; approximately 31 small-magnitude earthquakes (below M3.0) were detected, which is expected for the post-eruption phase of this volcano. There were approximately 12 earthquakes deeper than 8 mi (13 km).Data from Global Positioning System (GPS) instruments on Mauna Loa, record a very slight inflationary trend as the volcano recovers from the 2022 eruption, and magma begins to replenish the reservoir system. Gas and temperature data from a station on Mauna Loa' ...

HVO Kama'ehuakanaloa UNASSIGNED/UNASSIGNED - No activity of concern for Kamaʻehuakanaloa.

Apr 4, 2024 18:20 - 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; all earthquakes were of small magnitudes (below M3.0).

HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai.

Apr 4, 2024 18:20 - 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; all earthquakes were of small magnitudes (below M3.0). The continuously recording Global Positioning System (GPS) instrument on Hualālai recorded no significant deformation in the past month.

HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā.

Apr 4, 2024 18:20 - No significant activity was detected at Haleakalā volcano during the past month. HVO seismometers recorded no earthquakes in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) instrument on Haleakalā was offline for all of February and remains offline but no changes are suspected.

HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea.

Apr 4, 2024 18:20 - 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; all earthquakes were of small magnitudes (below M3.0). The continuously recording Global Positioning System (GPS) instrument on Mauna Kea (MKPM, operated by NASA’s Jet Propulsion Laboratory) recorded no significant deformation in the past month.

HVO Ofu-Olosega GREEN/NORMAL - No activity of concern for Ofu-Olosega.

Apr 4, 2024 18:08 - 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.

HVO Ta'u Island GREEN/NORMAL - No activity of concern for Taʻū Island

Apr 4, 2024 18:08 - 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.

HVO Tutuila Island GREEN/NORMAL - No activity of concern for Tutuila Island

Apr 4, 2024 18:08 - 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.

YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation

Apr 1, 2024 18:16 - Recent Work and NewsThere were no major eruptions of Steamboat Geyser during the month of March, although minor eruptions have been ongoing since the middle of the month, suggesting that a major eruption could occur within the next few days to weeks. The geyser has erupted once so far in 2024 (on February 26). SeismicityDuring March 2024, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, located 96 earthquakes in the Yellowstone National Park region. The largest event of the month was a minor ...