Recent Updates from the U.S. Geological Survey Volcano Hazards Program http://volcanoes.usgs.gov/ U.S. Geological Survey Volcano Hazards Program Mon, 23 Nov 2009 17:55:10 +0000 Activity Summary for past 24 hours: A DI event started this morning. At the summit, a circulating, bubbling, spattering, rising, and falling lava pond surface was visible in a hole in the vent cavity floor deep beneath Halema`uma`u Crater floor. 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 flows through tubes to the coast and is entering the ocean at two locations west of Kalapana. Past 24 hours at Kilauea summit: Overnight, the lava pond, visible in a hole in the floor of a ...http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=5029http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=502919.421 -155.287WATCHORANGE The real-time computer system located four small earthquakes in the vicinity of Long Valley caldera since the last update at 10:02 AM (PST) on November 22. A magnitude M=1.1 earthquake at 11:58 AM on the 22nd was located beneath the southern margin of the caldera near Sherwin Creek Campground (2 miles ESE of Mammoth Lakes). A M=0.3 earthquake at 11:43 PM on the was located beneath Mammoth Mountain. Two earthquakes occurred in the Sierra Nevada south of the caldera; the largest was a M=1.2 event at 4:24 AM on the 23rd located 9 miles WSW of Tom's Place.http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=5028http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=502837.7 -118.87NORMALGREEN The real-time computer system located two small earthquakes in the vicinity of Long Valley caldera since the last update at 10:04 AM (PST) on November 21. A magnitude M=1.6 earthquake at 6:00 AM was located in the Sierra Nevada south of the caldera (14 miles WSW of Tom's Place), and M=0.8 earthquake at 9:40 AM was located beneath Mammoth Mountain, both on the 22nd. http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=5027http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=502737.7 -118.87NORMALGREEN Activity Summary for past 24 hours: At the summit, a circulating, bubbling, spattering, rising, and falling lava pond surface was visible in a hole in the vent cavity floor deep beneath Halema`uma`u Crater floor. 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 flows through tubes to the coast and is likely entering the ocean at two locations west of Kalapana. Past 24 hours at Kilauea summit: At 9:21 am yesterday morning, a sliver of the Halema`uma`u vent rim (in the Halema`uma`u ...http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=5026http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=502619.421 -155.287WATCHORANGE