Data and Tools


See real-time alerts for U.S. volcanoes, subscribe to notification services, or choose an observatory that monitors and studies the geology and hazards of their specific locations.

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A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06.
April 27, 2016

Subscribe to Volcano Notification Services

The Volcano Notification Service (VNS) is a free service that sends you notification emails about volcanic activity happening at U.S. monitored volcanoes. You can customize the VNS to deliver notifications for certain volcanoes or a range of volcanoes, and you can also choose the notification types you want to receive. Notifications are issued by the five U.S. Volcano Observatories.

Screenshot of Volcano Hazards Program website page showing current alerts for U.S. Volcanoes
April 27, 2016

Current Alerts for U.S. Volcanoes

Information about active volcanoes in the United States is derived from the Recent Volcano Observatory Activity Reports generated by the USGS Volcano Hazards Program. NHSS retrieves this information every 12 hours and uses it to refresh the features in the U.S. Volcanoes layer.

Tephra and gas eruption from Mount St. Helens crater with dome
March 17, 2016

Volcano Monitoring Data

Many volcanoes in the U.S. are monitored by arrays of several instruments that detect subtle movements within the earth and changes in gas and water chemistry. The Volcano Hazards Program streams this data to its Volcano Observatories and makes it available on volcano-specific websites.

Ash fall accumulation from Redoubt Volcano in Nikiski after March 28, 2009 eruption plume
March 10, 2016

Alaska Volcano Observatory - Is Ash Falling?

Reports of ash fall are important to us; we use your observations to assess the character and size of an eruption plume. We report these data to the National Weather Service so they can keep their Ashfall Advisories current. Additionally, reports of NO ashfall during an eruption with expected ashfall are also important to us.