Recent Updates from the U.S. Geological Survey Volcano Hazards Program http://volcanoes.usgs.gov/ U.S. Geological Survey Volcano Hazards Program Sat, 07 Nov 2009 17:56:07 +0000 Activity Summary for past 24 hours: The second DI event in as many days is nearing completion. Spatter has nearly closed the hole in the Halema`uma`u Overlook vent cavity floor allowing only indirect views of the glow from a lava pond surface below. Sulfur dioxide emission rates from the Halema`uma`u and east rift zone vents remain elevated. Lava flows are active on the coastal plain. Lava is also flowing through tubes to the coast and entering the ocean at two locations west of Kalapana. DI events often affect surface flow activity on the flow field. Typically, surface flow ...http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4989http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498919.421 -155.287WATCHORANGE The real-time computer system located eight small earthquakes in the vicinity of Long Valley caldera since the last update at 9:12 AM (PST) on November 6. Two were located beneath Mammoth Mountain: a M=0.3 earthquake at 9:48 AM on the 6th and a M=1.2 earthquake at 12:06 AM on the 7th. Six were located in a cluster beneath the Sierra Nevada south of the caldera 0.5 mile east of Grinnell Lake (11 miles SW of Tom's Place) beginning with magnitude M=2.4 and 2.2 earthquakes at 10:56 and 10:58 AM on the 6th. The last in this cluster was a M=1.3 event at 10:11 PM on the 6th. Elsewhere, a M=1.3 ...http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4988http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498837.7 -118.87NORMALGREEN Report prepared by the U.S. Geological Survey. No reports of eruptive activity at Anatahan were received the past week, and seismic levels have remained low. Nothing unusual was observed in satellite images throughout the week. http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4981http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498116.35 145.67NORMALGREEN Activity Summary for past 24 hours: A DI event is nearing completion. Growth and partial collapse of the Halema`uma`u Overlook vent cavity floor continued to alternately obscure and reveal the circulating lava pond surface. Sulfur dioxide emission rates from the Halema`uma`u and east rift zone vents remain elevated. Lava flows are active on the coastal plain. Lava is also flowing through tubes to the coast and entering the ocean at two locations west of Kalapana. Past 24 hours at Kilauea summit: The Overlook vent webcam images again showed fluctuating glow and spattering ...http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4987http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498719.421 -155.287WATCHORANGE The real-time computer system located eight small earthquakes in the vicinity of Long Valley caldera since the last update at 9:17 AM (PST) on November 5. Four were located in the south moat of the caldera beneath the west end of the airport (6 miles east of Mammoth Lakes). They occurred between 3:26 PM and 4:56 PM on the 5th. The largest was the magnitude M=1.1 earthquake at 4:56 PM. The remaining four were located in the Sierra Nevada south of the caldera. The larges of these was a M=1.0 earthquake at 3:35 PM on the 5th located 11 miles SW of Tom's Place. http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4986http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498637.7 -118.87NORMALGREEN Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake volcano, Mount Shasta, and Lassen Peak in northern California. Mount St. Helens has been at Volcano Alert Level NORMAL (Aviation Color Code GREEN) since July 10, 2008. Recent Observations: As is common in the fall, high winds and rainstorms continue to generate substantial ...http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4985http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498545.61 -122.5NORMALGREEN No unusual seismicity or deformation.http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4982http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498219.692 -155.87NORMALGREEN A magnitude-4.8 earthquake occurred at 11:13 pm October 22, 2009 (HST) and was located 6 km (4 miles) southeast of Lo`ihi summit.http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4983http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498318.92 -155.27UNASSIGNEDUNASSIGNED Three earthquakes were located beneath Mauna Kea this past week. During a typical week, five or less earthquakes are located beneath the volcano.http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=4984http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=498419.82 -155.47NORMALGREEN