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Andrew Alden

The Northern San Andreas Fault

By November 14, 2012

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san andreas faultIt's been a while since I paid a visit to the San Andreas fault, but that's what I did today. California's best-known geological feature is peppered with exhibits these days, and today's locality has a formal earthquake trail that runs along the trace of the 1906 surface rupture. I include it in my gallery of the northern part of the fault. This gallery starts at the north end and works down, from the Alder Creek locality on the Pacific coast down to San Juan Bautista, where the 1906 rupture ended. In my galleries for the northern section and the creeping section, the action goes north to south whereas those for the central or 1857 segment and the southern segment go from south to north. That's because to me, all roads lead to the Parkfield segment, at the heart of the fault deep in the Coast Range.
The fault south of Los Trancos Ridge Open Space — Geology Guide photo


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