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The 1989 earthquake swarm beneath Mammoth Mountain, California: an initial look at the 4 May through 30 September activity

January 1, 1990

Mammoth Mountain is a 50 000- to 200 000-yr-old cumulovolcano standing on the southwestern rim of Long Valley in eastern California. On 4 May 1989, two M=1 earthquakes beneath the south flank of the mountain marked the onset of a swarm that has continued for more than 6 months. In addition to its longevity, noteworthy aspects of this persistent swarm are described. These aspects of the swarm, together with its location along the southern extension of the youthful Mono-Inyo volcanic chain, which last erupted 500 to 600 yr ago, point to a magmatic source for the modest but persistent influx of strain energy into the crust beneath Mammoth Mountain. -from Authors

Citation Information

Publication Year 1990
Title The 1989 earthquake swarm beneath Mammoth Mountain, California: an initial look at the 4 May through 30 September activity
DOI
Authors D. P. Hill
Publication Type Article
Publication Subtype Journal Article
Series Title Bulletin of the Seismological Society of America
Series Number
Index ID 70015810
Record Source USGS Publications Warehouse
USGS Organization