Earthquake swarm under Mammoth Mountain
An earthquake swarm under Mammoth Mountain (Mono County, CA), which started slowly on February 3, 2014 intensified in the early hours of February 5 with many small-magnitude earthquakes occurring in...
View ArticleEarthquake swarm under Mammoth Mountain - Update
The earthquake swarm under Mammoth Mountain which started on February 3, 2014 has declined over the past few days. The daily numbers of earthquakes, however, are not yet at background levels. Most...
View ArticleSmall Earthquake Swarm
A swarm of small earthquakes (magnitudes less than 2) occurred at a depth of 6-7 km (about 4 miles) beneath Highway 203 in Mammoth Lakes, California midway between the water treatment plant and the...
View ArticleYoung and Old Volcanoes in Eastern California: New Map, Report and Public...
A newly released geologic map and U.S. Geological Survey Professional Paper, Eruptive History of Mammoth Mountain and its Mafic Periphery, California, by CalVO scientists Wes Hildreth and Judith...
View ArticleYoung and Old Volcanoes East of the Sierra Nevada: New Map, Report and Public...
A new geologic map of the Long Valley Caldera, Mammoth Mountain, and the Middle Fork canyon of the San Joaquin River including Devils Postpile National Monument, recounts the geologic and volcanic...
View ArticleWhat's Under Long Valley? Water, Heat, and Molten Rock!
A picture is worth a thousand words—USGS Post Doctoral Fellow Jared Peacock's new 3D geophysical model for the Long Valley Caldera and Mammoth Mountain reveals a subsurface marked by active...
View ArticleGeologic maps lay the foundation for this virtual tour of western states...
Take a virtual geologic tour in the USGS Geonarrative, Volcanic Landscapes.
View ArticleUnpacking CalVO's new seismic monitoring boxes
If you've noticed any changes to the earthquake counts released in CalVO's weekly updates, don't worry - some behind-the-scenes improvements to our monitoring system have been implemented which allow...
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