Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program https://volcanoes.usgs.gov U.S. Geological Survey Volcano Hazards Program Fri, 19 Jun 2026 19:22:37 +0000 Slow eruption of lava continues within the summit crater. High spatial resolution satellite data from 13 and 15 June showed continued effusion on the eastern lava flow and the spalling of blocks from the lava dome in the crater. Typical slightly elevated surface temperatures were observed throughout the week when cloud cover was not obscuring the volcano. Seismic activity remains low, with occasional small volcanic earthquakes and seismic signals from minor rockfalls observed. Web camera observations showed no evidence of activity. The current lava eruption began in July 2021 and has filled ... https://www.avo.alaska.edu/activity/GreatSitkin.php https://www.avo.alaska.edu/activity/GreatSitkin.php avo 52.0765 -176.1109 WATCH ORANGE Earthquake activity continues near Mount Kupreanof volcano, with two events exceeding magnitude 3.0 this week along with multiple smaller events. Sulfur dioxide gas emissions were detected in satellite images throughout the week. There is no real-time geophysical monitoring network at Mount Kupreanof. The closest functioning seismometer is approximately 17 miles (27 km) to the east of the volcano as part of the Mount Veniaminof network. Mount Kupreanof is also monitored by satellite data, regional infrasound and lightning networks, and visual observations from pilots and mariners passing by ... https://avo.alaska.edu/volcanoes/volcinfo.php?volcname=Kupreanof https://avo.alaska.edu/volcanoes/volcinfo.php?volcname=Kupreanof avo 56.0126 -159.7912 ADVISORY YELLOW Seismic and infrasound activity remain elevated, with numerous small earthquakes, frequent infrasound signals from small explosions within the summit crater, and volcanic tremor recorded this week. Satellite data showed elevated sulfur dioxide emissions on most days and robust steam and gas emissions were observed in web camera images during periods of clear weather.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 Observatory uses nearby geophysical networks, ... https://avo.alaska.edu/activity/Shishaldin.php https://avo.alaska.edu/activity/Shishaldin.php avo 54.7554 -163.9711 ADVISORY YELLOW Overview:The summit eruption of Kīlauea in Halemaʻumaʻu remains paused. Summit inflation, vent glow and flaming, and degassing continues, indicating that another episode is likely. Forecast models indicate that the onset of fountaining episode 50 is likely to begin between June 24 and June 27 with June 25-26 most likely. No significant activity has been noted along Kīlauea’s East Rift Zone or Southwest Rift Zone.NOTE: Significant changes in activity between Daily Updates are posted here: https://www.usgs.gov/observatories/hvo/observatory-messages Summit Observations:Continuous periods ... https://www.usgs.gov/volcanoes/kilauea https://www.usgs.gov/volcanoes/kilauea hvo 19.421 -155.287 ADVISORY YELLOW 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. https://volcanoes.usgs.gov/observatories/cvo https://volcanoes.usgs.gov/observatories/cvo cvo 45.61 -122.5 NORMAL GREEN 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. https://www.usgs.gov/volcanoes/ofu-olosega https://www.usgs.gov/volcanoes/ofu-olosega hvo -14.175 -169.618 NORMAL GREEN 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. https://www.usgs.gov/volcanoes/ta-u-island https://www.usgs.gov/volcanoes/ta-u-island hvo -14.23 -169.454 NORMAL GREEN 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. https://www.usgs.gov/volcanoes/tutuila-island https://www.usgs.gov/volcanoes/tutuila-island hvo -14.295 -170.7 NORMAL GREEN 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 recorded no significant deformation in the past month. https://www.usgs.gov/volcanoes/haleakal%C4%81 https://www.usgs.gov/volcanoes/haleakal%C4%81 hvo 20.708 -156.25 NORMAL GREEN 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. A magnitude-4.6 earthquake on June 3 was located deep beneath the northwest flank of Hualālai and beneath the Island of Hawaiʻi; it was not related to volcanic processes or magma movement, but rather due to bending of the Pacific Plate from the weight of the Hawaiian Islands. The continuously recording Global Positioning System (GPS) instrument on Hualālai remains offline since March 15, 2026. HVO field ... https://www.usgs.gov/volcanoes/hual%C4%81lai https://www.usgs.gov/volcanoes/hual%C4%81lai hvo 19.692 -155.87 NORMAL GREEN No significant activity was detected at Kamaʻehuakanaloa (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. https://www.usgs.gov/volcanoes/kama%E2%80%98ehuakanaloa https://www.usgs.gov/volcanoes/kama%E2%80%98ehuakanaloa hvo 18.92 -155.27 UNASSIGNED UNASSIGNED Mauna Kea seismic activity has decreased and returned to long-term rates following a swarm in March, attributed to the underlying and inactive Kohala volcano. Continuous GPS instruments on Mauna Kea volcano did not record significant changes in ground deformation trends through April 2026. https://www.usgs.gov/volcanoes/mauna-kea https://www.usgs.gov/volcanoes/mauna-kea hvo 19.82 -155.47 NORMAL GREEN Mauna Loa had a slight increase in seismic activity compared to the previous month, with clustering of events under Mokuʻāweoweo and the upper Southwest Rift Zone still present. A total of 170 earthquakes were detected beneath Mauna Loa's summit region in the May reporting period, while April had 132 earthquakes. A magnitude-6 earthquake on May 22 was located deep beneath the west flank of Mauna Loa and beneath the Island of Hawaiʻi; it was not related to volcanic processes or magma movement, but rather due to bending of the Pacific Plate from the weight of the Hawaiian Islands. Data from ... https://www.usgs.gov/volcanoes/mauna-loa https://www.usgs.gov/volcanoes/mauna-loa hvo 19.475 -155.608 NORMAL GREEN SummaryYellowstone Caldera activity remains at background levels, with 45 located earthquakes in May (largest = M2.0). Deformation measurements indicate no significant uplift or subsidence of the caldera or north caldera rim since January 2026. Recent Work and NewsEchinus Geyser, in Norris Geyser Basin, remained active, with 2 eruptions in May. The month also included eruptions of Black Diamond Pool in Biscuit Basin (site of a hydrothermal explosion in 2024) that were recorded by acoustic, seismic, and temperature measurements on May 5 and 11. The biennial coordination meeting of the ... https://www.usgs.gov/volcanoes/yellowstone https://www.usgs.gov/volcanoes/yellowstone yvo 44.43 -110.67 NORMAL GREEN Power has been sufficiently restored to the Port Heiden Receive Facility, allowing stable data flow from Aniakchak seismic stations. There are now enough reliable data to establish the real-time state of the volcano. Due to this, Aniakchak Volcano is moving from UNASSIGNED to GREEN/NORMAL.Aniakchak Volcano had been at UNASSIGNED since December 23, 2025 due to a lack of data received from Aniakchak seismic stations following a power outage at the Port Heiden Receive Facility. Repairs have since been made to the Port Heiden Receive Facility, sufficiently restoring data flow from the Aniakchak ... https://avo.alaska.edu/activity/Aniakchak.php https://avo.alaska.edu/activity/Aniakchak.php avo 56.9058 -158.209 NORMAL GREEN