Abstract
Analysis of central Washington seismicity of the past two decades reveals some interesting features. Shallow seismicity and deep seismicity occur as different geographic distributions. Concentration of seismicity along north‐ to northwest‐oriented trends appears to be related to a buried continental rift and possible associated fault zones. Hypothesized extensions of the Chiwaukum graben and Straight Creek fault systems are plausible structural controls on the seismicity.
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