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====Bibliography==== **1.** Blakely, R. J. et al. Connecting the Yakima fold and thrust belt to active faults in the Puget Lowland, Washington. Journal of Geophysical Research 116, (2011). **Summary** Blakely et al. uses aeromagnetic evidence to suggest that faults within the Yakima Fold and Thrust Belt (YFTB) may extend all the way to Western Washington, merging with the active Seattle and Whidbey Island faults. If these connected faults are seismically active along their entire lengths then seismic hazards in Eastern Washington are potentially more dangerous and should be reassessed. **2.** Blakely, R. J., Sherrod, B. L., Weaver, C. S., Rohay, A. C. & Wells, R. E. Tectonic Setting of the Wooded Island Earthquake Swarm, Eastern Washington. Bulletin of the Seismological Society of America 102, 1786–1795 (2012). **Summary** Blakely et al. used high-resolution aeromagnetic data to model the tectonic setting for the Wooded Island earthquake swarm. They came to the conclusion that regional tectonic forces (Yakima Fold and Thrust Belt) were the cause of the swarm though it may have been triggered by fluid pressure changes. **3.** Chen, X., Shearer, P. M. & Abercrombie, R. E. Spatial migration of earthquakes within seismic clusters in Southern California: Evidence for fluid diffusion. Journal of Geophysical Research 117, (2012). **Summary** They studied 69 seismicity bursts to quantify their spatial migration and use a set of parameters to look for behavior differences between aftershock sequences and earthquake swarms. tmax = timing of the largest event Δσquasi = ratio between total moment and radius μ = skew of the seismic moment release ds = measures the distance separation between the centers of the first half and the second half of each burst, normalized by the mean radius of the burst After-shock sequences: low tmax, high Δσquasi, high μ, and low ds (no significant migration) Earthquake swarms: high tmax, low Δσquasi, low μ, and high ds (significant migration)

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