Introduction

The Berkeley Digital Seismic Network (BDSN) is a regional network of very broadband and strong motion seismic stations spanning northern California and linked to UC Berkeley through continuous telemetry (Figure 3.1 and Table 3.1). This network is designed to monitor regional seismic activity at the magnitude 3+ level as well as to provide high quality data for research projects in regional and global broadband seismology.

The network upgrade and expansion initiated in 1991 has continued, and it has grown from the original 3 broadband stations installed in 1986-87 (BKS, SAO, MHC) to 28 stations in 2004, including the ocean-bottom seismometer in Monterey Bay. One new station was added in the past year (MCCM), while one station was closed (POTR).

We take particular pride in high quality installations, which often involve lengthy searches for appropriate sites away from sources of low-frequency noise, as well as continuous improvements in installation procedures and careful monitoring of noise conditions at existing stations.

Future expansion of our network is contingent on the availability of funding and coordination with other institutions for the development of a denser state-of-the-art strong motion/broadband seismic network and joint earthquake notification system in this seismically hazardous region.

Figure 3.1: Map illustrating the distribution of operational (filled squares), planned (open squares), and closed (grey squares) BDSN stations in northern and central California. The open diamonds indicate new sites developed in collaboration with USArray
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Berkeley Seismological Laboratory
215 McCone Hall, UC Berkeley, Berkeley, CA 94720-4760
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