Volcanic Activity Reports

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

Apr 29, 2017 19:55 - The summit lava dome of Cleveland continues to slowly grow. Satellite data from yesterday indicates the dome has widened and grown vertically. Dome extrusion has occurred with little to no detectable seismicity. Slow dome growth with little to no seismicity is typical behavior at Cleveland as observed over the last several years of activity. No significant seismicity or infrasound data was observed over the past day. Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an ...
Apr 29, 2017 19:55 - No significant volcanic activity was observed at Bogoslof volcano in seismic, infrasound data or satellite data over the past day. Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Activity may ramp back up with additional explosions producing high-altitude (>15,000 ft) volcanic clouds with little precursory activity. Some previous explosions have been preceded by an increase in earthquake activity that allowed for short-term forecasts of imminent significant explosive activity. Although we are able to detect energetic ...
Apr 29, 2017 19:19 - Activity Summary: K?lauea Volcano continues to erupt at the summit and at Pu?u ???? on the East Rift Zone. The episode 61g lava flow continues to enter the ocean at Kamokuna, where a small lava delta has been growing since late March. Surface flows remain active above the pali near Pu?u ????. These flows pose no threat to nearby communities. At the summit, the lava lake level is about 28 m (92 ft) below the floor of Halema?uma?u Crater. Summit Observations: Tiltmeters at K?lauea's summit recorded continued deflationary tilt over the past day. The lava ...
Apr 28, 2017 16:18 - 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: Field crews worked at Mount St. Helens on 21 April, repairing and maintaining seismic and GPS sites around the volcano as well as the Spirit Lake monitoring sites. This was an exceptionally hard winter and heavy snow year in the ...
Apr 27, 2017 20:35 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity remain above long-term background levels. Observations: Mauna Loa is not erupting. During the past week, small-magnitude earthquakes were recorded primarily beneath the upper southwest rift zone of the volcano, at depths up to 5 km (3 mi), and the east flank at depths of 5-13 km (3-8 miles). A magnitude 3.7 earthquake occurred in the upper southwest rift zone on April 26. GPS measurements continue to show deformation related to inflation of a magma reservoir beneath the summit ...
Apr 6, 2017 01:13 - No unusual seismicity was recorded during the month of March 2017. Eleven earthquakes were recorded in the vicinity of L??ihi in the past month.
Apr 6, 2017 01:13 - There were no significant changes during the month of March 2017. Six earthquakes deeper than 13 km depth (8 mi) and 3 earthquakes shallower than 13 km depth (8 mi) were recorded beneath the volcano. A continuously recording Global Positioning System (GPS) receiver atop Hual?lai recorded no significant deformation.
Apr 6, 2017 01:13 - There were no significant changes during the month of March 2017. No earthquakes occurred in the vicinity of Haleakal? (East Maui) volcano and HVO?s single, continuously recording Global Positioning System (GPS) instrument atop Haleakal? volcano recorded no significant deformation.
Apr 6, 2017 01:13 - No significant deformation or seismicity occurred during the month of March 2017. HVO recorded 15 earthquakes deeper than 13 km (8 mi) and 15 shallow earthquakes beneath the volcano during the past month. A single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA?s Jet Propulsion Laboratory) recorded no significant deformation.
Apr 3, 2017 17:28 - 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 March 1, 2017 (0000h PST) through March 31, 2017 (2359h PDT): Mt Shasta: ...
Apr 3, 2017 15:56 - Seismicity During March 2017, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 63 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a microearthquake of magnitude 2.9 that occurred on March 29, 09:05 PM MDT located 11 miles north of Pahaska Tepee, WY. March seismicity did not include any swarm activity. Yellowstone earthquake activity in March remains at low background levels. Ground deformation Uplift centered near the Norris Geyser ...

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