Volcanic Activity Reports

Recent Volcano Updates from the U.S. Geological Survey Volcano Hazards Program

Feb 23, 2018 22:15 - Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of activity. 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. Recent Observations: Monitoring systems show that activity at Cascade Range volcanoes remained at background levels throughout the week.
Feb 23, 2018 21:27 - Low level unrest continues at Cleveland Volcano. A small explosion was detected in seismic and infrasound data yesterday (06:54 UTC 22 Feb). No ash cloud was detected from this event, yet several hours after the explosion (14:15 UTC 22 Feb), satellite data show moderately elevated surface temperatures extending about 2 km ESE from the summit, indicative of a warm deposit. No activity has been observed in seismic and infrasound data, and clouds have obscured satellite views of the volcano today. No other activity was observed this week. Future explosive activity is ...
Feb 23, 2018 18:54 - Activity Summary: K?lauea Volcano?s summit and East Rift Zone eruptions continue with no significant changes. Episode 61g lava flow activity persists on the upper portion of the flow field and on Pulama pali. Lava is not entering the ocean at this time. These lava flows pose no threat to nearby communities. The summit lava lake is about 41 m (134 ft.) below the floor of Halema?uma?u. Low rates of ground deformation and seismicity continue across the volcano. Summit Observations: The height of the lava lake at K?lauea?s summit was measured this morning at about ...
Feb 22, 2018 19:29 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity have not changed significantly in the past week and persist above long-term background levels. Observations: During the past week, only a few small-magnitude earthquakes occurred beneath the volcano, primarily on its west flank, at depths ranging from 5-13 km (3-8 miles). Two small earthquakes also occurred near Mauna Loa?s summit at depths less than 5 km (3 miles). Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) measurements continue to ...
Feb 9, 2018 23:32 - The Aviation Color Code and Volcano Alert Level were decreased to GREEN/NORMAL at Shishaldin Volcano on Wednesday, February 7, 2018, based on declining seismic and infrasound activity over the previous month. Shishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound networks.
Feb 7, 2018 00:09 - No significant activity in January. HVO recorded no earthquakes in the vicinity of L??ihi.
Feb 7, 2018 00:09 - No significant changes in January. HVO recorded 2 earthquakes deeper than 13 km (8 miles) depth and no earthquakes shallower than 13 km (8 miles) in the vicinity of the volcano. HVO's continuously recording Global Positioning System (GPS) receiver atop Hual?lai recorded no significant deformation.
Feb 7, 2018 00:09 - No significant changes in January. Two earthquakes were recorded in the vicinity of the volcano and the continuously recording Global Positioning System (GPS) instrument atop Haleakal? volcano recorded no significant deformation.
Feb 7, 2018 00:09 - No significant changes in January. HVO recorded 13 earthquakes deeper than 13 km (8 mi) and 12 shallow earthquakes beneath the volcano. A single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA?s Jet Propulsion Laboratory) recorded no significant deformation.
Feb 1, 2018 20:17 - Recent work The LKWY seismic and GPS stations, located near Lake, WY, are back on line after a maintenance visit corrected an extended outage (since late November 2017) due to winter weather. Be sure to check out Yellowstone Caldera Chronicles, the weekly article published by scientists of the Yellowstone Volcano Observatory (YVO). New articles describing Yellowstone?s geology, history, and recent activity are posted every Monday on the YVO website . Also, a public event featuring YVO scientists is being planned for May 7, 2018, in Gardiner, MT. Stay tuned for ...
Feb 1, 2018 17:37 - Monitored CALIFORNIA VOLCANOES Current Volcano Alert Level: all NORMAL Current Aviation Color Code: all GREEN Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes. Observations for January 1, 2018 (0000h PST) through January 31, 2018 (2359h PDT): Mt ...

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