U.S. Geological Survey's Alert Notification System for Volcanic Activity
Fact Sheet
2006-3139
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Abstract
The United States and its territories have about 170 volcanoes that have been active during the past 10,000 years, and most could erupt again in the future. In the past 500 years, 80 U.S. volcanoes have erupted one or more times. About 50 of these recently active volcanoes are monitored, although not all to the same degree. Through its five volcano observatories, the U.S. Geological Survey (USGS) issues information and warnings to the public about volcanic activity. For clarity of warnings during volcanic crises, the USGS has now standardized the alert-notification system used at its observatories.
Suggested Citation
Gardner, C.A., and Guffanti, M.C., 2006, U.S. Geological Survey's alert-notification system for volcanic activity (ver. 2.0, April 2025): U.S. Geological Survey Fact Sheet 2006–3139, 4 p., https://doi.org/10.3133/fs20063139.
ISSN: 2327-6932 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | U.S. Geological Survey's alert notification system for volcanic activity |
| Series title | Fact Sheet |
| Series number | 2006-3139 |
| DOI | 10.3133/fs20063139 |
| Edition | Version 1.0: March 2, 2007; Version 2.0: April 23, 2025 |
| Publication Date | March 02, 2007 |
| Year Published | 2006 |
| Language | English |
| Contributing office(s) | Volcano Hazards Program |
| Description | 4 p. |