July 2009 Commentary

A major earthquake occurred at 02:22 AM (PDT). This event was located of the W Coast of South Island, New Zealand about 95 miles) WNW of Invercargill, New Zealand. The moment magnitude for this event, determined by the USGS National Earthquake Information Service, is 7.6. A small local tsunami was generated. NEIC Information for this event.

A weak earthquake occurred at 12:24 PM (PDT). This event was located Offshore of Northern California about 15 miles W of Petrolia, CA. The moment magnitude for this event, determined at Berkeley, is 3.5. The maximum modified Mercalli Intensity for the event was II. Shake Map of instrument intensities measured for this event, is available (Did You Feel It?") Map.

A weak earthquake occurred at 07:54 AM (PDT). This event was located offshore of Northern California about 62 miles WNW of Ferndale, CA.. The moment magnitude for this event, determined at Berkeley, is 3.5. The maximum modified Mercalli Intensity for the event was II. (Did You Feel It?") Map.

A weak earthquake occurred at 10:03 PM (PDT). This event was located about 2 miles N of The Geysers, CA. The moment magnitude for this event, determined at Berkeley, is 3.7. The maximum modified Mercalli Intensity for the event was III. Shake Map of instrument intensities measured for this event, is available. (Did You Feel It?") Map.

A weak earthquake occurred at 05:29 PM (PDT). This event was located about 1 mile NE of The Geysers, CA. The moment magnitude for this event, determined at Berkeley, is 3.8. The maximum modified Mercalli Intensity for the event was III. Shake Map of instrument intensities measured for this event, is available. (Did You Feel It?") Map.