June 2009 Commentary

A weak earthquake occurred at 10:27 AM (PDT). This event was located offshore of Northern California about 62 miles W of Ferndale, CA. The moment magnitude for this event, determined at Berkeley, is 3.6. The maximum modified Mercalli Intensity for the event was II. (Did You Feel It?") Map.

A weak earthquake occurred at 10:29 AM (PDT). This event was located about 30 miles W of Red Bluff, 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.

A light earthquake occurred at 05:32 AM (PDT). This event was located about 8 miles SSW of Lake Nacimiento, CA. The moment magnitude for this event, determined at Berkeley, is 4.4. The maximum modified Mercalli Intensity for the event was IV. Shake Map of instrument intensities measured for this event, is available. (Did You Feel It?") Map.

A moderate earthquake occurred at 03:15 PM (PDT). This event was located about 3 miles E of Danville, CA. The moment magnitude for this event, determined at Berkeley, is 3.5. The maximum modified Mercalli Intensity for the event was V. Shake Map of instrument intensities measured for this event, is available. (Did You Feel It?") Map.

A minor earthquake occurred at 12:54 AM (PDT). This event was located 7 miles WNW of Petrolia, CA. The moment magnitude for this event, determined at Berkeley, is 3.9. 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 minor earthquake occurred at 10:04 AM (PDT). This event was located off the coast 81 miles W of Petrolia, CA. The moment magnitude for this event, determined at Berkeley, is 3.5.