Premium
Central Washington seismicity: Evidence for a reactivated buried continental rift and northwest‐trending structural zones
Author(s) -
Johnson Peggy A.
Publication year - 1989
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl016i011p01325
Subject(s) - induced seismicity , geology , graben , rift , seismology , fault (geology) , tectonics
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.