Hi Billion & Don,

Here's another bit that rather brings some additional information about the same location.

"One of the more provocative observations from this new trenching is that the most recent earthquake appears to be small relative to the penultimate event, based on the extent of damage to the sedimentary section and width of faulting. The most recent event was assumed to be 1857, but these observations suggest that 1857 is the penultimate event in the northern Carrizo Plain. If true, then the most recent surface rupture may have been the 1881 "Parkfield" event rupturing the Cholame segment due to its increased stress from high 1857 slip in the Carrizo Plain. Current work is focussing on using pollen of introduced species, such as Eucalyptus, to try to better date the sediment involved in these two events and resolve if the most recent event is 1857 or possibly 1881. Work also continues in reinterpreting the early geodetic surveys of the area to see if sufficient data can resolve post 1855 slip. The conclusions of this study will rewrite the recent history of the central San Andreas fault south of Parkfield, and possibly revise our expectations for a Parkfield type event triggering an M7 along the Cholame segment expect in the near future."

This is a rather interesting statement if you read it carefully. First of all it says the report will rewrite recent history and the last part may say they expect a M7 quake on the Cholame section. I totally agree with that. My deep, dark and ugly ear tone matches this area and one day, that ole quake is going to arrive and I am positive it will be at least a 7.

The full report is on the link and also mentions several other area's including Los Angeles.

Petra

• Report From The SCEC