It has been an exceptionally busy year for Berkeley's HRSN project with
the 28 September 2004 repeat of the long awaited M6 Parkfield
earthquake (Langbein et al., 2005), the discovery of nonvolcanic tremor activity
(Nadeau and Dolenc, 2005; research report ) and the
ongoing SAFOD project (all in addition to the routine operations,
maintenance and enhancement of California's first and longest operating
borehole seismic network).