@article {687, title = {Holocene fault scarps near Tacoma, Washington, USA}, journal = {Geology}, volume = {32}, year = {2004}, note = {765ehTimes Cited:50Cited References Count:22}, month = {Jan}, pages = {9-12}, abstract = {Airborne laser mapping confirms that Holocene active faults traverse the Puget Sound metropolitan area, northwestern continental United States. The mapping, which detects forest-floor relief of as little as 15 cm, reveals scarps along geophysical lineaments that separate areas of Holocene uplift and subsidence. Along one such line of scarps, we found that a fault warped the ground surface between A.D. 770 and 1160. This reverse fault, which projects through Tacoma, Washington, bounds the southern and western sides of the Seattle uplift. The northern flank of the Seattle uplift is bounded by a reverse fault beneath Seattle that broke in A.D. 900-930. Observations of tectonic scarps along the Tacoma fault demonstrate that active faulting with associated surface rupture and ground motions pose a significant hazard in the Puget Sound region.}, issn = {0091-7613}, doi = {10.1130/G19914.1}, author = {Sherrod, B. L. and Brocher, T. M. and Weaver, C. S. and Bucknam, R. C. and Blakely, R. J. and Kelsey, H. M. and Nelson, A. R. and Haugerud, R.} } @article {733, title = {Late Holocene earthquakes on the Toe Jam Hill fault, Seattle fault zone, Bainbridge Island, Washington}, journal = {Geological Society of America Bulletin}, volume = {115}, year = {2003}, note = {740qwTimes Cited:41Cited References Count:53}, month = {Nov}, pages = {1388-1403}, abstract = {Five trenches across a Holocene fault scarp yield the first radiocarbon-measured earthquake recurrence intervals for a crustal fault in western Washington. The scarp, the first to be revealed by laser imagery, marks the Toe Jam Hill fault, a north-dipping backthrust to the Seattle fault. Folded and faulted strata, liquefaction features, and forest soil A horizons buried by hanging-wall-collapse colluvium record three, or possibly four, earthquakes between 2500 and 1000 yr ago. The most recent earthquake is probably the 1050-1020 cal. (calibrated) yr B.P. (A.D. 900930) earthquake that raised marine terraces and triggered a tsunami in Puget Sound. Vertical deformation estimated from strati-graphic and surface offsets at trench sites suggests late Holocene earthquake magnitudes near M7, corresponding to surface ruptures >36 km long. Deformation features recording poorly understood latest Pleistocene earthquakes suggest that they were smaller than late Holocene earthquakes. Postglacial earthquake recurrence intervals based on 97 radiocarbon ages, most on detrital charcoal, range from similar to12,000 yr to as little as a century or less; corresponding fault-slip rates are 0.2 mm/ yr for the past 16,000 yr and 2 mm/yr for the past 2500 yr. Because the Toe Jam Hill fault is a backthrust to the Seattle fault, it may not have ruptured during every earthquake on the Seattle fault. But the earthquake history of the Toe Jam Hill fault is at least a partial proxy for the history of the rest of the Seattle fault zone.}, issn = {0016-7606}, doi = {10.1130/B25262.1}, author = {Nelson, A. R. and Johnson, S. Y. and Kelsey, H. M. and Wells, R. E. and Sherrod, B. L. and Pezzopane, S. K. and Bradley, L. A. and Koehler, R. D. and Bucknam, R. C.} } @article {2107, title = {Field and laboratory data from an earthquake history study of the Toe Jam Hill fault, Bainbridge Island, Washington}, journal = {U.S. Geological Survey Open-File Report}, volume = {02-60}, year = {2002}, note = {id: 428}, month = {2002}, pages = {37 p.}, author = {Nelson, A. R. and Johnson, S. Y. and Wells, R. E. and Kelsey, H. M. and Pezzopane, S. K. and Sherrod, B. L. and Bradley, L. A. and Iii, Koehler R. D. and Bucknam, R. C. and Haugerud, R. A. and LaPrade, W. T.} } @article {2106, title = {Field and Laboratory data from an earthquake history study of the Toe Jam Hill fault, Bainbridge Island, Washington}, journal = {U.S. Geological Survey Open-File Report 02-60}, year = {2002}, note = {id: 259}, month = {2002}, pages = {2 plates and 37 pages}, author = {Nelson, A. R. and Johnson, S. Y. and Wells, R. E. and Pezzopane, S. K. and Kelsey, H. M. and Sherrod, B. L. and Bradley, L. A. and Koehler, R. D., III and Bucknam, R. C. and Haugerud, R. A. and LaPrade, W. T.} } @article {2181, title = {Postglacial and Late Holocene earthquakes on the Toe Jam strand of the Seattle fault, Bainbridge Island Washington}, journal = {Geological Society of America Abstracts with Programs}, volume = {32}, year = {2000}, note = {id: 258}, month = {2000}, pages = {A-58}, author = {Nelson, A. R. and Johnson, S. Y. and Pezzopane, S. K. and Wells, R. E. and Kelsey, H. M. and Sherrod, B. L. and Koehler, R. D. and Bradley, L. A. and Bucknam, R. C. and LaPrade, W. T. and Cox, J. W. and Narwold, C. F.} } @article {2218, title = {Holocene surface faulting in the Seattle fault zone, Bainbridge Island, Washington}, journal = {Seismological Research Letters}, volume = {70}, year = {1999}, note = {id: 1404}, month = {1999}, pages = {233}, author = {Nelson, A. R. and Pezzopane, S. K. and Bucknam, R. C. and Koehler, R. D. and Narwold, C. F. and Kelsey, H. M. and Sherrod, B. L. and LaPrade, W. T. and Wells, R. E. and Johnson, S. Y.} }