The Thursday Picture – Whole Lotta Shakin’ Goin’ On

San Andreas Fault, Los Trancos OSP, Hike 28Last Sunday I hiked in yet another one of the Peninsula’s Open Space Preserves: Los Trancos OSP.  This preserve is part of the Mid Peninsula Open Space District http://www.openspace.org/preserves/pr_los_trancos.asp

What makes this preserve interesting is that the San Andreas fault runs right through the OSP!  In this picture taken on the Fault Trail, the posts with yellow banding are located directly over the San Andreas Fault.  The fault is the dividing line between two tectonic plates.  The American Plate to the left in the picture and the Pacific Plate to the right in the picture.  The Pacific Plate is moving northward at an average of 3/4″ per year.  We’ve had two major earthquakes in the Bay Area that occurred along this fault area.  The 1906 San Francisco quake and the 1989 Loma Prieta quake.

With just over 5 miles of very scenic trails, The Los Trancos Open Space Preserve was a great place to complete my 28th hike of the year!

If things start shaking, and your looking for me, well…I’m over the hill!

 

 

 

 

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