Mekometer measurements in the Imperial Valley

During the six weeks following the October 15, 1979 earthquake, parts of the Imperial Valley Mekometer network (Fig. 1) around the Imperial fault to the east of El Centro were re-measured, some repeatedly, in an attempt to assess the coseismic and postearthquake slip on the fault, and horizontal strain adjustment around it. This report presents the results, together with the most recent pre-earthquake measurements, for comparison. It includes also a brief discussion of the results.