Figure 1. Location of the two-color EDM
network and the BTSM network with respect to the San Andreas fault and other
localities at Parkfield, CA. The monuments at POMO and MIDE have nearby
monuments POMM and MIDA (not identified in the figure). POMM and MIDA are
deeply anchored and are described by Langbein et al. (1995). Geophysical
Research Letters, 1999.