CECIL

Durmid Hill, (DHL), is located very close to the southeast end of the San Andreas fault, and is where we operate two longbase instruments for tectonic studies: since 1994, a below-grade strainmeter (524 m), and since June 2005, a second surface instrument (405 m, DHM/DHL2), at right angles to it. The second system is one of five built as part of the Plate Boundary Observatory (PBO) project. Earlier a portable laser strainmeter (303 m) was deployed at different azimuths to study the (unantipated) local amplification of the earth-tide strain. Concerns over the possible initiation of a moderate earthquake in this area have routinely made the timely recordings of much interest recent data plot... Via the HPWREN wireless research network, which provides high-quality Internet access to the remote strainmeter sites, and the Anza Project's ROADNet/Waveform Explorer program, which handles real-time data, we are able both to keep a close watch on the recordings (critical to rapid response to..

Primary location: La Jolla United States