March 2009 Commentary

A light earthquake occurred at 10:40 AM (PDT). This event was located about 11 miles NNE of Morgan Hill, CA. The moment magnitude for this event, determined at Berkeley, is 4.3. The maximum modified Mercalli intensity was IV. Shake Map of instrument intensities measured for this event, is available. Map.

A minor earthquake occurred at 01:32 AM (PDT). This event was located off the coast about 12 miles W of Eureka, CA. The moment magnitude for this event, determined at Berkeley, is 3.7. The maximum modified Mercalli intensity was III. (Did You Feel It?") Map.

A minor earthquake occurred at 05:29 AM (PDT). This event was located about 12 miles NNW of Willits, CA. The moment magnitude for this event, determined at Berkeley, is 3.6.

A minor earthquake occurred at 06:34 PM (PDT). This event was located off the coast about 55 miles W of Ferndale, CA. The moment magnitude for this event, determined at Berkeley, is 3.8. The maximum modified Mercalli intensity was III. (Did You Feel It?") Map.

A major earthquake occurred at 11:17 AM (PDT). This event was located in the Tonga Islands Region. The moment magnitude for the earthquake, determined by the U.S. Geological Survey, is 7.6. USGS NEIC information.

A minor earthquake occurred at 04:04 AM (PDT). This event was located about 9 miles WSW of Ferndale, CA. The moment magnitude for this event, determined at Berkeley, is 3.8. The maximum modified Mercalli intensity was II. Shake Map of instrument intensities measured for this event, is available. ("Did You Feel It?") Map.

A minor earthquake occurred at 10:23 PM (PDT). This event was located about 11 miles SE of San Benito, CA. The moment magnitude for this event, determined at Berkeley, is 3.5. Shake Map of instrument intensities measured for this event, is available.

A minor earthquake occurred at 08:07 PM (PDT). This event was located about 11 miles SE of San Benito, CA. The moment magnitude for this event, determined at Berkeley, is 3.5.

A minor earthquake occurred at 07:47 AM (PDT). This event was located about 7 miles ENE of Milpitas, CA. The local magnitude for this event, determined at Berkeley, is 3.5. The maximum modified Mercalli intensity was III. ("Did You Feel It?") Map.