Volcanic Activity Reports

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

Aug 17, 2017 19:30 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity have not changed significantly in the past week, and continue to be above long-term background levels. Observations: Small-magnitude earthquakes continue to occur beneath the volcano. During the past week, these were primarily beneath the caldera and upper Southwest Rift Zone, at depths less than 5 km (3 miles), and included magnitude 3.0 and magnitude 3.1 earthquakes at 2.2 and 2.7 km (1.4 and 1.7 miles) depth, respectively, beneath the upper Southwest Rift Zone on the morning ...
Aug 17, 2017 19:02 - 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 from Pu?u ???? continues to enter the ocean at Kamokuna. Surface flows are active above the pali and on the coastal plain. These flows pose no threat to nearby communities. There have been no major changes in seismicity or deformation across the volcano. The summit lava lake level has risen somewhat since it was measured at about 37 m (121 ft) below the rim of the Overlook crater yesterday afternoon. Summit ...
Aug 17, 2017 18:34 - Unrest continues at Cleveland Volcano. Weakly elevated surface temperatures were observed in partly cloudy satellite data this morning. Clear web camera images from yesterday evening show no plumes from the summit. No significant activity observed in seismic and infrasound data. 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 explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and ...
Aug 17, 2017 18:34 - Unrest continues at Bogoslof Volcano. No activity has been observed in seismic data over the past day. No activity has been observed in partly cloudy satellite data. The Aviation Color Code remains at ORANGE and the Alert Level remains at WATCH. Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Activity can escalate quickly with additional 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 ...
Aug 17, 2017 18:34 - No activity was observed in mostly cloudy satellite data. No activity at Pavlof was observed in a few partly cloudy web camera views from yesterday evening . No significant activity has been detected in seismic and infrasound data over the past day. The level of unrest at Pavlof can change quickly and the progression to eruptive activity can occur with little or no warning. We continue to monitor Pavlof closely and will provide any new information about the status of the volcano when or if it becomes available.
Aug 11, 2017 19:10 - 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: Activity at Cascade Range volcanoes remained at background levels throughout the week. A few small earthquakes were recorded at Mount Rainier, Mount St. Helens, and Mount Hood, consistent with normal levels of activity at those ...
Aug 2, 2017 20:00 - Earthquake activity remained elevated at L??ihi during July with HVO recording 27 earthquakes in the vicinity of the volcano. This is a 75% drop in the total number of L??ihi earthquakes compared to June. Most earthquakes occurred around 12 km (7.5 mi) depth.
Aug 2, 2017 20:00 - No significant changes were detected at Hual?lai during the month of July. One earthquake greater than 13 km (8 mi) depth and 2 earthquakes shallower than 13 km (8 mi) depth were recorded in the vicinity of the volcano. A continuously recording Global Positioning System (GPS) receiver atop Hual?lai recorded no significant deformation.
Aug 2, 2017 20:00 - No significant changes were detected at Haleakal? during the month of July. One earthquake occurred in the vicinity of the volcano and HVO?s single, continuously recording Global Positioning System (GPS) instrument atop Haleakal? volcano recorded no significant deformation.
Aug 2, 2017 20:00 - No significant deformation or seismicity occurred during the month of July. HVO recorded 10 earthquakes deeper than 13 km (8 mi) and 8 shallow earthquakes beneath the volcano in July. A single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA?s Jet Propulsion Laboratory) recorded no significant deformation.
Aug 1, 2017 22:24 - 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 July 1, 2017 (0000h PST) through July 31, 2017 (2359h PDT): Mt Shasta: No ...
Aug 1, 2017 18:56 - Seismicity During July 2017, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 528 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a minor earthquake of magnitude 3.6 on July 18, at 02:31 PM MDT, located about nine miles north northeast of West Yellowstone, MT. The earthquake was reported felt in the town of West Yellowstone, MT. This earthquake is part of a continued energetic sequence of earthquakes in the same area that began on June 12. ...
Jul 28, 2017 21:17 - Earlier this week, AVO released an Information Statement describing an increase in seismic activity at Great Sitkin Volcano in the central Aleutian Islands, possibly starting as early as 30 July 2016. Along with the year-long increase in shallow earthquakes, there have been two events on January 10 (January 11 UTC) and July 21 (July 22 UTC) of this year that may represent small explosions near the summit of the volcano. Deeper earthquakes, in the 18-32 km depth range, have also occurred more frequently at Great Sitkin over the past year. Taken together, these observations ...

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