| Schematic geologic map of the Whidbey Island area. A-A', B-B', and C-C' are lines of cross section shown in next figure. "SWIF" = southern Whidbey Island fault zone; DMF = Devils Mountain fault. Stereonet plots are lower-hemisphere projections showing locations and fault-plane solutions of earthquakes since 1970 along the trend of the southern Whidbey Island fault that had magnitudes > 3.5.
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