...S. M. Ihnen; D. M. Hadley Abstract Spatial variations in strong ground motion in the 1965 Seattle, Washington, earthquake ( M S = 6.5) can be accurately reproduced using three-dimensional ray tracing techniques. Synthetic accelerograms calculated at nearly 1600 receivers spread over the Puget Sound...

...Ernest A. Kaarsberg Abstract The Puget Sound earthquake of 29 April 1965 occurred in an area that is part of the Circum-Pacific Seismic Belt, a region of current crustal instability and adjustment of which earthquakes are one expression. In Figure 1, the location (47.4 degrees N, 122.3 degrees W...

...Derek B. Booth; Ray E. Wells; Robert W. Givler Abstract Unreinforced brick chimneys in the greater Seattle area were damaged repeatedly in the Benioff zone earthquakes of 1949, 1965, and 2001. A survey of visible chimney damage after the 28 February 2001 Nisqually earthquake evaluated approximately...

... S waves. This high response in West Seattle is consistent with damage reports from the 1949 ( m b 7.1) and 1965 ( m b 6.5) earthquakes. Stress-drop estimates for the events we recorded were generally low, between 0.4 and 25 bars, although some of the events may have had higher stress drops...

... recorded at three loca- tions within Puget Sound from the 1965 earthquake (Figure 1). Additionally, the Tacoma and Seattle sites contained Carder displacement meter instrumentation which recorded horizontal motion. Table I lists the station locations, distances, and L IN- SEATTLE FEDERA~L OFF,CE SLOG. gflC...

... ground motions of the 1985 Michoacán and Valparaíso earthquakes). For periods less than 1 sec, the estimated response spectral velocities on soil sites in the Seattle-Olympia region are about twice those recorded during the 1949 Olympia and 1965 Seattle Wadati-Benioff zone earthquakes, and the durations...

...Wendy C. Grant; Craig S. Weaver; James E. Zollweg Abstract A magnitude 5.5 ( M L ) earthquake occurred on 14 February 1981 near Elk Lake in the southern Washington Cascade Range. It was the largest earthquake to occur in Washington since the 1965 Seattle earthquake ( M b = 6.5). The epicenters...

.... Bonilla M. G. Schlocker J. (1967) . Relation of building damage to geology in Seattle, Washington, during the April 1965 earthquake , U.S. Geol. Surv. Profess. Paper 575-D , D183 - D191...

... total moment of 1.9 × 10 26 dyne cm ( M w 6.8). The earthquake ruptured to the south with at least two subevents. The combined area of asperities and seismic moment for the 1949 earthquake was compiled with those from the 1965 Seattle-Tacoma and the 2001 Nisqually earthquakes and with those from Japan...

... parallel with the shallowest events, but shows a significant broadening beneath the eastern Olympic Mountains and Puget Sound. Events with depths greater than 50 km south of the 1965 Seattle earthquake ( m b = 6.5) strike north-northeast, approximately parallel with the shallower distributions; however...

... increased with period, which is consistent with regression results reported by others. The regression equations were reasonably accurate in predicting the response spectra of accelerograms recorded at Olympia and Seattle, Washington during the 1949 and 1965 Puget Sound earthquakes, but overestimated...

....” Water tanks in Snohomish overflowed. M 9.2 27 March 1964 Good Friday Alaska earthquake Effects felt in many states, including Washington (McGarr and Vorhis, 1968) where many houseboats were damaged. M 6.5 28 April 1965 Seattle-Tacoma earthquake Green Lake in North Seattle was “sloshing back...

... earthquake. Its epicenter was 47.159°N 122.733°W and hypocenter was 51 km beneath the Nisqually River delta area, approximately 18 km northeast of Olympia, Washington. Damage from this earthquake had many similarities to damage noted for earthquakes in 1949 (M = 7.1) and in 1965 (M = 6.5). Damage included...

.... The proximity of the SFZ to downtown Seattle along with paleoseismic evidence of a large earthquake in the Holocene make it one of the greatest tectonic hazards in the Pacific northwest region of the United States ( Liberty and Pratt, 2008 ). Despite extensive study, the geometry of the SFZ and the recurrence...

... with additional measurements of site response. Following the 29 April 1965 ( m b 6.5) Seattle earthquake, the greatest damage was observed in the lower downtown business district in the Duwamish Valley and in West Seattle ( Fig. 1 ) ( Mullineaux et al., 1967 ). The Duwamish Valley is filled with recent...

... see ref. ~5 Walla Walla-Mil- and $ 3 ton-Freewater, Ore. WASHINGTON STATE EARTHQUAKES 1840 THROUGH 1965 469 TABLE I--Continued No. Year Day Hour Location Int. Mag. Ref. Remarks felt 269 1936 J u l y 24 a.m., Seattle IV 5 P.S.T. IV felt 270 1936 J u l y 25 Bothell-Seattle III-IV 5 two shocks, both IV...