PRELIMINARY GEOLOGY OF THE PACIFIC NORTHWEST
STRONG-MOTION SEISMOGRAPH SITES

Derek Booth and Kathy Troost
Seattle Geologic Mapping Project, University of Washington
March 9, 2001

Latitude	Longitude	Station	Code	USGS Quadrangle	Location	Prel. Geology
47.6475	-122.037	ALCT	163	Redmond	Redmond-Fall City Rd	Qvr (Minard and Booth 1988; MF-2016)
46.109	-123.0329	ALST	163
47.52350	-122.29983	BOE		Seattle S	W of Boeing Field	F (thick, over abandoned meander) (Waldron et al. 1962; I-354)
47.7555	-122.2885	BRKS	163	Edmonds E	Lake Forest Park	Qal (Minard 1983, MF-1541)
45.3544	-122.9886	CHE	464
44.5857	-123.3032	COR	464
47.8	-122.21	CSEN	163	Bothell	North Creek	Qvr (Minard 1985; MF-1747)
45.5169	-122.6896	CSO	163
43.1192	-123.2428	DBO	686
47.038	-122.896	DNR	464	Tumwater	WA DNR HQ
47.574	-122.382	EAK	464	Seattle S	West Seattle	Qva (SGMP)
47.74	-122.04	EARN	464	Redmond	Novelty Hill	Qvr (Minard and Booth 1988; MF-2016)
47.4943	-121.8714	ELW	464	North Bend	Upper Raging River	Qmw (SGMP)
48.454	-122.6251	ERW	686	Pt. Townsend 1:100K	Mt. Eire	Bedrock (Pessl et al. 1989; I-1198-F)
47.7191	-122.2319	FINN	464	Bellevue N	Finn Hill	Qvt (Waldron et al. 1962; I-354)
47.5644	-122.8253	GNW	686	Wildcat Lake	Tahuya Lake	Bedrock (intrusive) (Haeussler and Clark 2000; OFR 00-356)
47.584	-122.35	HAK	464	Seattle S	Harbor Island	f (Waldron et al. 1962; I-354)
47.125	-122.927	HAL	464	Tumwater	Cooper Pt.
47.574	-122.389	HAN	464	Seattle S	West Seattle	Qva (SGMP)
45.5092	-122.6567	HAO	163
47.58366	-122.35014	HAR		Seattle S	Harbor Island	f (Waldron et al. 1962; I-354)
47.584	-122.357	HAW	464	Seattle S	Harbor Island	f (Waldron et al. 1962; I-354)
46.3923	-119.5326	HAWA	686
43.5625	-114.4137	HLID	686
47.5654	-122.3839	HOLY	464	Seattle S	West Seattle	Qva (SGMP)
45.5502	-122.8951	KEEL	464
47.5753	-122.3017	KIMB	464	Seattle S	Beacon Hill	Qvt (Waldron et al. 1962; I-354)
47.5031	-122.7672	KIMR	163	Wildcat Lake	Kitsap Co. Airport	Qvr (Haeussler and Clark 2000; OFR 00-356)
47.7517	-122.6431	KINR	163	Lofall	Poulsbo	Qal (Yount et al. 1993; OFR 93-233)
47.675	-122.6297	KITP	464	Poulsbo	Keyport area	Qvt (Yount et al. 1993; OFR 93-233)
47.63934	-122.35054	LAP		Seattle N	North Queen Anne Hill	Qvt (Waldron et al. 1962; I-354)
47.6565	-122.3894	LAWT	464	Seattle N	Lawton School, Magnolia	Qva (SGMP)
47.7679	-122.1151	LEOT	464	Maltby	N of Lake Leota	Qvt (Minard 1985; MF-1746)
46.75	-121.81	LON	686
47.2559	-120.6648	LTY	800
47.5653	-122.3839	MARY	163	Seattle S	West Seattle	Qva (SGMP)
47.8985	-121.8889	MBPA	163	Lake Roesiger	Woods Creek substation	ml (of/over Qvt) (Booth 1990; I-1745)
47.4686	-122.1846	MPL	464	Renton	Maplewood substation	Qvt (Mullineaux 1965; GQ-405)
47.12	-122.56	MURR	464	Ft. Lewis	Tillicum	Qvr (SGMP)
48.2639	-117.1203	NEW	800
47.6867	-122.2559	NOWS	163	Seattle N	NOAA Sand Point	m (SGMP)
47.7489	-124.1781	OCWA	686
47.1119	-122.29	PCEP	464	Fredrickson	Fredrickson	Qvr (SGMP)
46.9898	-122.4409	PCFR	464
46.8891	-122.3003	PCMD	464
48.65	-123.4505	PGC	464
43.8111	-120.8719	PIN	800
50.5188	-123.0765	PMB	686
47.5805	-122.0285	PNLK	464	Issaquah	Pine Lake area	Qvt (Booth and Minard 1992; MF-2206)
49.316	-119.616	PNT	686
47.6317	-122.3543	QAW	464	Seattle N	Queen Anne Hill	Qva (Waldron et al. 1962; I-354)
46.0403	-122.8851	RAI	464
47.3372	-121.9314	RAW	464	Cumberland	Retreat Lk. substation	Qvr (Tabor et al. in press; Snoq. 1:100K)
47.4348	-122.1862	RBEN	464	Renton	Benson Hill	Qvt (Mullineaux 1965; GQ-405)
45.5408	-122.5643	RBO	464
47.5405	-122.1857	RHAZ	464	Bellevue S	Newport Hills	Qvt (Waldron et al. 1962; I-354)
45.6619	-122.6569	ROSS	464
46.9649	-123.5421	RWW	464
48.7683	-122.4151	SBES	464	Bellingham 1:100K	Silver Beach, Bellingham
47.6544	-122.3081	SEA	163	Seattle N	ATM building, UW	Qvt(?)
47.54969	-122.25043	SEW		Bellevue S	Seward Park	Tb (Waldron et al. 1962; I-354)
47.5565	-122.248	SP2	464	Bellevue S	Seward Park	Qvt (Waldron et al. 1962; I-354)
47.5565	-122.248	SPW	464	Bellevue S	Seward Park	Qvt (Waldron et al. 1962; I-354)
48.0775	-123.0456	SQM	686
46.9723	-123.4338	SSW	464
48.242	-122.455	STAN	464	Juniper Beach	Terry's Corner	Qvr(m) (Pessl et al. 1989; I-1198-F)
47.2581	-122.3669	TBPA	163	Poverty Bay	Port of Tacoma	af (SGMP)
47.5369	-122.3004	TKCO	163	Seattle S	Boeing Field	Qal (Waldron et al. 1962; I-354) m (SGMP)
47.6946	-121.6889	TTW	686	Devil's Slide	S Fk. Tolt reservoir dam	Qvi (Booth 1990; I-1745)
47.61	-122.334	UNK	464	Seattle S	Denny Regrade	m (Waldron et al. 1962; I-354)
47.2639	-122.4836	UPS	464	Tacoma N	University of Puget Sound	Qvt (SGMP)
49.059	-113.91	WALA	686
47.575	-122.384	WEK	464	Seattle S	West Seattle	Qva (SGMP)
47.575	-122.382	WIN	464	Seattle S	West Seattle	Qva (SGMP)
47.6089	-122.1744	WISC	464	Bellevue S	Bellevue	Qvt (Waldron et al. 1962; I-354)
42.4339	-118.6369	WVOR	686
47.385	-123.605	WYN	464		Wynoochee River (dam?)	Qal and/or m (SGMP)

f/af	fill
m/ml	modified land
Qmw	mass wastage/colluvial deposits
Qal	Holocene river alluvium
Qvi	Vashon ice contact deposits
Qvr	Vashon recessional deposits
Qvt	Vashon till
Qva	Vashon advance outwash (Esperance Sand)
Tb	Blakeley Formation (bedrock, primarily sandstone)

Updated March, 2001