Minor earthquakes continue to shake up San Ramon

UPDATE TUESDAY, 7:18 AM – The earthquakes continue as three more hit San Ramon Tuesday morning.

At 4:55 a.m., an 1.5 magnitude quake shook San Roman followed by a 1.4 magnitude earthquake that hit at 5:31 a.m.

Another one hit at 7:02 a.m. that was recorded with a 1.8 magnitude.

UPDATE 6:29 P.M.: Consecutive 3.5-magnitude earthquakes near San Ramon shook large portions of the Bay Area this afternoon, according to U.S. Geological Survey data, continuing the East Bay’s torrent of temblors.

USGS officials reported that the pair of earthquakes struck within seconds of each other at 4:21 p.m. along the Calaveras Fault, which intersects the Hayward Fault. These were the two largest of 13 earthquakes above 2.5-magnitude that USGS officials have reported in San Ramon or nearby within the past week.

Counting earthquakes of lower magnitude, there were 201 small shakers in the past week as of 5:20 p.m. Monday. Eleven of those earthquakes were registered by USGS’ system within the preceding hour.

Besides the 3.5-magnitude duo, Monday’s second-largest temblor occurred at 4:02 p.m., when a 2.8-magnitude earthquake struck the area. That earthquake centered on the border of San Ramon and Danville, in the vicinity of the Crow Canyon Country Club at 711 Silver Lake Dr.

It was the same location that a 3.4-magnitude earthquake struck at 6:10 a.m. Thursday, according to USGS data. At the time, that was the largest temblor in the recent quake swarm. People as far away as Vallejo and Sunnyvale felt it, according to a USGS reporting system.

Areas north of Vallejo and south of San Jose reported feeling the 3.5-magnitude shakers Monday, according to the USGS.Police dispatchers from San Ramon and Danville said that they received no calls regarding injuries or structural damage.

UPDATE 5:26 P.M.: For a full list of earthquakes in the area, visit Caltech’s website —> http://scedc.caltech.edu/recent/Maps/122-38.html

A geophysicist tells KRON the recent swarm of earthquakes is a continuation from last week’s swarm.

UPDATE: 4:30 P.M.: A 1.6-magnitude earthquake hit the area at 4:24 p.m. Monday afternoon. That’s the 13th earthquake to hit the area.


UPDATE 4:27 P.M.:  A 3.5-magnitude earthquake hit the area at 4:21 p.m. Monday afternoon. That is the 12th earthquake reported in the area on Monday. A KRON 4 viewer described it as a hard and sharp jolt as she was shopping at a Walgreen’s in Danville.

Tune in to KRON at 5 p.m. for the latest on this breaking news story.
UPDATE MONDAY 4:10 PM: 2.8 magnitude earthquake hits San Ramon.

SAN RAMON (KRON) — A series of earthquakes has been shaking up the San Ramon area for about a week now.

8 earthquakes have hit San Ramon on Monday alone. None have had a magnitude higher than a 2.4, though.

However, a 3.4 magnitude quake was centered around San Ramon on Thursday at 6:10 AM, USGS officials said.

San Ramon went through at least 20 earthquakes this past Saturday.

Stick with KRON 4 News for updates on the rattles if they continue to occur.

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