As part of the U.S. Geological Survey's Volcano Hazards Program, the California Volcano Observatory monitors the volcanoes of California and Nevada and advances scientific understanding of volcanic processes in order to reduce the harmful impacts of volcanic activity.

2025年3月20日 · There are about 170 potentially active volcanoes in the U.S. The mission of the USGS Volcano Hazards Program is to enhance public safety and minimize social and economic disruption from volcanic unrest and eruption through our National Volcano Early Warning System.

Kīlauea ranks among the world's most active volcanoes. Since 1952, Kīlauea has erupted dozens of times. From 1983 to 2018 eruptive activity was nearly continuous along the volcano's East Rift Zone, centered at Puʻuʻōʻō and Kupaianaha vents.

Hazard Notification System (HANS) for Volcanoes ... USGS Volcano Notifications. Back. Last 24 Hours Alaska Volcano Observatory 2025-04-07 19:56:06 UTC, Spurr, Great Sitkin, Katmai Daily Update Hawaiian Volcano Observatory 2025-04-07 19:47:59 UTC, Kilauea Daily Update Recent Notices AVO | CalVO ...

3 天之前 · The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa. CONTACT INFORMATION: [email protected]. Subscribe to these messages: https://volcanoes.usgs.gov/vns2/

2025年3月11日 · ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT U.S. Geological Survey Wednesday, March 12, 2025, 8:31 AM AKDT (Wednesday, March 12, 2025, 16:31 UTC). SPURR (VNUM #313040) 61°17'56" N 152°15'14" W, Summit Elevation 11070 ft (3374 m) Current Volcano Alert Level: ADVISORY Current Aviation Color Code: YELLOW. …

Live view from Halemaʻumaʻu crater from the eastern rim of the caldera. ===== FAQs about Kīlauea eruptions: https://www.usgs.gov/observatories/hvo/frequent...

4 天之前 · The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program.

We accomplish this by delivering effective forecasts, warnings, and information about volcano hazards based on scientific understanding of volcanic processes. Learn more by exploring USGS volcanic maps.

Mount Spurr (including Crater Peak) is listed as “very high threat” by the most recent edition of the USGS National Volcanic Threat Assessment. This is because it has erupted frequently in recent history and has shown signs of unrest since its most recent eruption.