Volcanic Activity Reports

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

Oct 21, 2017 18:53 - Activity Summary: K?lauea Volcano continues to erupt at its summit and from the Pu?u ???? vent on its East Rift Zone. The episode 61g lava flow is still entering the ocean at Kamokuna and producing scattered surface flow activity. These lava flows pose no threat to nearby communities at this time. The height of the lava lake at K?lauea?s summit has risen very slightly since it was measured at about 36 m (120 ft) below the Overlook crater rim Wednesday afternoon. There have been no significant changes in ground deformation or seismicity rates across the ...
Oct 21, 2017 18:11 - Unrest at Cleveland volcano continues. No unusual activity was observed in partly cloudy views of the volcano by satellite and web camera today. No significant activity related to lava effusion observed in seismic data and no explosive activity detected in infrasound data over the past day. Lava domes that have been erupted since 2001 have all been destroyed by explosive activity within weeks to months after lava effusion. These explosions typically produce relatively small volcanic ash clouds that dissipate within hours, however more significant ash emissions are ...
Oct 21, 2017 18:11 - Low-level unrest at Bogoslof volcano continues. No activity was observed in mostly cloudy satellite views over the past day. No significant activity was detected in seismic or infrasound data from sensors located on neighboring islands over the past day. Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Activity can escalate quickly with explosions producing high-altitude (>15,000 ft) volcanic clouds with little to no detectable precursory activity. Some previous explosions have been preceded by an increase in earthquake ...
Oct 20, 2017 20:32 - 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. Over the past week, small earthquakes were located at Mount St. Helens and Mount Hood. CVO field engineers are working ...
Oct 19, 2017 19:05 - 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: Small-magnitude earthquakes have been occurring primarily beneath the summit caldera and upper Southwest Rift Zone. These were mostly at shallow depths of less than 5 km (3 mi) with some additional deeper events at depths between 5-13 km (3-8 miles). Global Positioning System (GPS) and satellite radar (InSAR) measurements continue to show deformation consistent with ...
Oct 4, 2017 00:05 - Earthquake activity remained slightly elevated at L??ihi during September with HVO recording 11 earthquakes in the vicinity of the volcano. Most earthquakes occurred around 12 km (7.5 mi) depth.
Oct 4, 2017 00:05 - No significant changes were detected at Hual?lai during the month of September. HVO reports 2 earthquakes greater than 13 km (8 miles) depth and 4 earthquakes shallower than 13 km (8 miles) beneath the volcano during the past month. A continuously recording Global Positioning System (GPS) receiver atop Hual?lai recorded no significant deformation.
Oct 4, 2017 00:05 - No significant changes were detected at Haleakal? during the month of September. No earthquakes were recorded in the vicinity of the volcano and HVO?s single, continuously recording Global Positioning System (GPS) instrument atop Haleakal? volcano recorded no significant deformation.
Oct 4, 2017 00:05 - No significant deformation or seismicity occurred during the month of September. HVO recorded 9 earthquakes deeper than 13 km (8 mi) and 13 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.
Oct 2, 2017 22:38 - 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 September 1, 2017 (0000h PST) through September 30, 2017 (2359h PDT): Mt ...
Oct 2, 2017 15:45 - Seismicity During September 2017, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 115 earthquakes were located in the Yellowstone National Park region. The largest event was a minor earthquake of magnitude 3.2 on September 16, at 11:38 PM MDT, located about 11 miles south of Old Faithful, WY. The earthquake was reported felt in Yellowstone National Park. September seismicity in Yellowstone was marked by the ongoing seismic swarm ~six miles north of West Yellowstone, MT. Activity in ...


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