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Long Valley Volcano Observatory
This is the homepage of the United States Geological Survey's (USGS) Long Valley Volcano Observatory (LVO). It features a variety of information on the Mono-Inyo Craters volcanic chain in Long Valley Caldera, California. Materials include a current conditions page with status reports, updates and information releases. There is also monitoring data on seismic activity, ground deformation, gases and tree kill, and hydrologic studies. Topical studies include a reference on the most recent eruption in the Inyo chain (about 250 years ago), and information on the Long Valley Exploratory Well. There are also links to USGS fact sheets and other references about the caldera.
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
  • College (13-14)
  • College (15-16)
  • Graduate / Professional
Type of resource:
  • Portal:
    • Government
  • Geological Sciences:
    • Geology
  • Natural hazards
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Information presented on this website is considered public information (unless otherwise noted) and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.
DLESE Catalog ID: USGS-ED-000-000-000-127
Resource contact / Creator / Publisher:
Publisher: United States Geological Survey (USGS)
Long Valley Observatory

Contact: Joseph J. Kerski
Educational Resources
United States Geological Survey (USGS)

Contact: Phil Stoffer
Educational Resources
United States Geological Survey (USGS)