Fourth Earthquake Hits Berkeley

On Thursday, four earthquakes centered in Berkeley shook the East Bay. The fourth, at 8:16 p.m., was measured at a magnitude 3.8.

Berkeley and the East Bay felt a dramatic shove on Thursday evening, with a 3.8 magnitude earthquake rattling the area after a day full of shakes and shudders.

began at 2:41 p.m. on Thursday with a 4.0 magnitude quake. This was followed by a 1.8 magnitude quake at 3:09 p.m. and another quake, with a magnitude of 2.2 at 4:50 p.m. The latest quake hit at 8:16 p.m. and was measured at a magnitude of 3.8., after being downgraded from a 4.2.

The epicenter of the 8:16 p.m. quake was at the UC Berkeley campus by Piedmont Avenue and Bancroft Way.

According to Laura Soble at Berkeley's Youth Musical Theatre Company, the final earthquake shook the during a performance of "." Soble described the event in an email:

It was one of those memorable LIVE theatre moments. The 17-year-old singer/actor playing Charles Kringas, Misha Riley of Richmond, was in the middle of a song... the entire Julia Morgan rumbled from floor to ceiling (we could see the wood beams moving). The actor was in a natural pause in a long solo song... the entire audience and orchestra waited to see what would happen next... and another shake came. Then, without missing too many beats once the shaking stopped, Misha jumped back into the song and the show went on. At the end of the number the audience burst into applause and cheers for several minutes. All of the young actors exercised great poise... and professionalism. [It was] quite exciting to witness.

Magnitude 4.2 Date-Time
  • Friday, October 21, 2011 at 03:16:05 UTC
  • Thursday, October 20, 2011 at 08:16:05 PM at epicenter
Location 37.869°N, 122.252°W Depth 9.6 km (6.0 miles) Region SAN FRANCISCO BAY AREA, CALIFORNIA Distances
  • 2 km (1 miles) E (100°) from Berkeley, CA
  • 5 km (3 miles) ESE (123°) from Albany, CA
  • 5 km (3 miles) NE (41°) from Emeryville, CA
  • 8 km (5 miles) NNW (346°) from Oakland, CA
Location Uncertainty horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles) Parameters Nph= 89, Dmin=1 km, Rmss=0.19 sec, Gp= 29°,
M-type=local magnitude (ML), Version=3 Source Event ID nc71667591


Did you feel the earthquakes? Which felt the strongest? Let us know in the comments.


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