Earthquake sequences and seismicity of the Watsonville Region of Central California

The Watsonville area designates here the region of<br />Central California between the latitude 36°40' and 37°05' N and the longitudes<br />121°25' and 121°50' W. This area can be considered as a regional<br />seismic unit. The seismic activity during the years 1960-1966 gives a<br />background level of 2 or 3 earthquake of magnitude 2 < il/ ^ 3, per month,<br />with periods of increased activity associated with the occurrence of larger<br />shocks. The presence and nature of sequences of earthquakes in the area is<br />investigated for the period 1952-1966. Three sequences in 1963 are studied<br />in more detail. Tentatively the sequences of the area are grouped<br />in three general types.

Abstract licence: CC BY

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