Data is presented for all the June 1966 Parkfield, California, earthquakes that were recorded by five strong motion accelerographs in the Shandon-Cholame area south of Parkfield. The instrument array is generally transverse to the fault, intersecting it just north of the southern limit of the June surface fractures. Unique seismograms were obtained of small shocks during wave motion from the principal earthquake; in the three minutes following the onset at 0426, June 28 GMT, two of the strong motion instruments recorded completely ten different earthquakes. Approximate epicenters are located for thirteen of the earthquakes.

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