July 2008 Commentary

A minor earthquake occurred at 06:39 AM (PDT). This event was located off the coast of Northern California about 49 miles W of Petrolia, CA. The moment magnitude, determined at Berkeley, is 4.2. The maximum modified Mercalli intensity was III. Shake Map of instrument intensities measured for this event, is available. ("Did You Feel It?") Map.

A strong earthquake occurred at 11:42APM (PDT). This event was located in Southern California about 2 miles SW of Chino Hills. The moment magnitude for the event, determined at Pasadena, is 5.4. The maximum modified Mercalli intensity was VI. Shake Map of instrument intensities measured for this event, is available. ("Did You Feel It?") Map. An in-depth report on the event, prepared by the SCSN, is available.

A major earthquake occurred at 07:39 PM (PDT). The earthquake was located off the east coast of Honshu, Japan, about 80 miles ENE of Iwaki, Honshu, Japan. The moment magnitude for this event, determined by the U.S. Geological Survey, is 7.0. Recorded (4 JMA) in Fukushima, Iwate, Miyagi and Tochigi. USGS NEIC information.

A minor earthquake occurred at 01:25 PM (PDT). This event was located about 4 miles WNW of Paso Robles, CA. The moment magnitude, determined at Berkeley, is 3.7. The maximum modified Mercalli intensity was IV. Shake Map of instrument intensities measured for this event, is available.

A major earthquake occurred at 07:12 PM (PDT). The earthquake was located in the Sea of Okhotsk about 245 miles WNW of Petropavlovsk-Kamchatskiy, Russia. The moment magnitude for this event, determined by the U.S. Geological Survey, is 7.7. The event had a depth of focus of 633 km (394 miles) beneath the surface of the earth. USGS NEIC information.