Hi All. There is no indication of strain building in the Bay Area, but I have this feeling that were going to see something in the area of Vallejo. There have been two microquakes in the last 8 hours.

Using the NEIC catalog with a 10 mile radius I found a quake that was estimated to have been a 6.2M. in 1898 There have been 20 quakes within that 10 mile radius.

Here is a newspaper account of the 1898 earthquake.

“March 30, 1898
Severe damage was done in San Francisco by the earthquake that struck at 11:43 p.m. The quake lasted 40 seconds and twisted chimneys and broke chandeliers. There was much panic. A building at 445 Clementina collapsed, and many chimneys were cracked. Whittier School on Harrison at Fourth was badly damaged because it was on made ground. Chimney on the Jefferson and Denman schools were so twisted that they were rebuilt. Heaviest damage was reported at the Naval Base at Mare Island. Congress appropriated $350,000 for repairs to the Naval Yard. A half-dozen fires were caused in Vallejo when oil lamps overturned”.

It is believed that the quake centered near Mare Island and may have been on the southern end of Rodgers Creek fault. It could also have been on the West Napa fault.

The reason this has caught my attention is that on 11/08/2000 there was a 3.0M near Vallejo just a little over two months after the Yountville quake and now we have these two microquakes. There is a lot of creep in the northern section of the Hayward fault. That creep has to go somewhere and I think were starting to see where some of it might be going. The Rodgers Creek fault with the outside chance of the West Napa fault. My money is on the Rodgers Creek fault. Take Care…Don in creepy town.

CDMG 1898 03 31 0743 38.20 -122.40 6.20 UKDMG
CDMG 1919 01 20 0925 38.25 -122.32
CDMG 1945 10 01 172617 38.27 -122.18 10 3.40 MLBRK
CDMG 1951 03 11 192829 38.02 -122.28 2.30 MLBRK
CDMG 1952 01 03 000002 38.30 -122.22 2.00 MLBRK
CDMG 1953 11 27 092546 38.20 -122.10 2.50 MLBRK
CDMG 1954 11 06 182559 38.05 -122.38 2.10 MLBRK
CDMG 1955 10 22 175230 38.03 -122.23 2.00 MLBRK
CDMG 1956 04 04 005328 38.05 -122.33 2.20 MLBRK
CDMG 1956 11 06 153713 38.20 -122.20 2.30 MLBRK
CDMG 1969 03 17 204210 38.17 -122.16 2.51 MDGS
CDMG 1973 04 09 015800.20 38.04 -122.23 3 2.36 MDGS
PDE 1977 09 05 174528.20 38.19 -122.12 8 3.70 MLBRK
PDE 1985 11 29 020335.90 38.03 -122.24 7 2.30 MLBRK
PDE 1986 04 18 110021.70 38.23 -122.18 3 2.30 MLBRK
PDE 1987 01 08 132731.10 38.09 -122.17 7 2.40 MLBRK
PDE 1989 08 12 033619 38.23 -122.15 10 2.50 MLBRK
PDE 1990 10 14 020621.50 38.05 -122.23 9 3.60 MLBRK
PDE 1995 10 21 120907.76 38.03 -122.32 12 2.90 MDGM
PDE-W 2000 11 08 115941.72 38.13 -122.17 9 3.00 MDNC