Publications
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Seismic wave triggering of nonvolcanic tremor, episodic tremor and slip, and earthquakes on Vancouver Island
[1] We explore the physical conditions that enable triggering of nonvolcanic tremor and earthquakes by considering local seismic activity on Vancouver Island, British Columbia during and immediately after the arrival of large-amplitude seismic waves from 30 teleseismic and 17 regional or local earthquakes. We identify tremor triggered by four of the teleseismic earthquakes. The close temporal and
Authors
Justin L. Rubinstein, Joan S. Gomberg, John E. Vidale, Aaron G. Wech, Honn Kao, Kenneth C. Creager, Garry C. Rogers
Saddle Mountain fault deformation zone, Olympic Peninsula, Washington: Western boundary of the Seattle uplift
The Saddle Mountain fault, first recognized in the early 1970s, is now well mapped in the Hoodsport area, southeastern Olympic Peninsula (northwestern United States), on the basis of light detection and ranging (LIDAR) surveys, aerial photography, and trench excavations. Drowned trees and trench excavations demonstrate that the Saddle Mountain fault produced a MW 6.5–7.0 earthquake 1000–1300 yr ag
Authors
Richard J. Blakely, Brian L. Sherrod, Jonathan F. Hughes, Megan L. Anderson, Ray E Wells, Craig S. Weaver
Modified Mercalli Intensity Assignments for the May 16, 1909, Northern Plains Earthquake
We combine newspaper accounts and Nuttli's (1976) isoseismal map to assign modified Mercalli intensity (MMI) at 76 towns for the May 16, 1909 Northern Plains earthquake. The earthquake was felt across more than 1,500,000 km2 in the States of Minnesota, Montana, North Dakota, South Dakota, and Wyoming and the Provinces of Alberta, Manitoba, Ontario, and Saskatchewan.
Authors
W. H. Bakun, M. C. Stickney, G. Rogers
Transport slopes, sediment cover, and bedrock channel incision in the Henry Mountains, Utah
[1] Field data from channels in the Henry Mountains of Utah demonstrate that abundant coarse sediment can inhibit fluvial incision into bedrock by armoring channel beds (the cover effect). We compare several small channels that share tributary junctions and have incised into the same sedimentary bedrock unit (Navajo Sandstone) but contain differing amounts of coarse diorite clasts owing to the spa
Authors
Joel P. L. Johnson, Kelin X. Whipple, Leonard Sklar, Thomas C. Hanks
San Andreas array failure is only a temporary setback
No abstract available.
Authors
Mark D. Zoback, William L. Ellsworth, Stephen H. Hickman
The crowbar chronicles and other tales
The analysis of historical earthquakes often relies heavily on archival accounts describing the effects of shaking on structures and people. Newspaper articles are among the most common, useful, and easily found sources of information. Dramatic earthquake effects are almost certain to have made the news during historic times; the challenge for modern seismologists is not to be overly swayed by art
Authors
Susan E. Hough
A deployment of broadband seismic stations in two deep gold mines, South Africa
In-mine seismic networks throughout the TauTona and Mponeng gold mines provide precise locations and seismic source parameters of earthquakes. They also support small-scale experimental projects, including NELSAM (Natural Earthquake Laboratory in South African Mines), which is intended to record, at close hand, seismic rupture of a geologic fault that traverses the project region near the deepest
Authors
Arthur F. McGarr, Margaret S. Boettcher, Jon Peter B. Fletcher, Malcolm J. S. Johnston, R. Durrheim, S. Spottiswoode, A. Milev
Finding Trapped Miners by Using a Prototype Seismic Recording System Made from Music-Recording Hardware
The goal of this project was to use off-the-shelf music recording equipment to build and test a prototype seismic system to listen for people trapped in underground chambers (mines, caves, collapsed buildings). Previous workers found that an array of geophones is effective in locating trapped miners; displaying the data graphically, as well as playing it back into an audio device (headphones) at h
Authors
Thomas L. Pratt
Estimating Casualties for Large Earthquakes Worldwide Using an Empirical Approach
We developed an empirical country- and region-specific earthquake vulnerability model to be used as a candidate for post-earthquake fatality estimation by the U.S. Geological Survey's Prompt Assessment of Global Earthquakes for Response (PAGER) system. The earthquake fatality rate is based on past fatal earthquakes (earthquakes causing one or more deaths) in individual countries where at least fou
Authors
Kishor Jaiswal, David J. Wald, Mike Hearne
Earthquake hazard in the New Madrid Seismic Zone remains a concern
There is broad agreement in the scientific community that a continuing concern exists for a major destructive earthquake in the New Madrid seismic zone. Many structures in Memphis, Tenn., St. Louis, Mo., and other communities in the central Mississippi River Valley region are vulnerable and at risk from severe ground shaking. This assessment is based on decades of research on New Madrid earthquake
Authors
A. D. Frankel, D. Applegate, M. P. Tuttle, R. A. Williams
Crustal structure across the Three Gorges area of the Yangtze platform, central China, from seismic refraction/wide-angle reflection data
We present active-source seismic data recorded along a 300 km-long profile across the Three Gorges area of the western Yangtze platform, central China. From west to east, the profile crosses the Zigui basin, Huangling dome and Jianghan basin. The derived crustal P-wave velocity structure changes significantly across the Tongchenghe fault that lies at the transition from the Huangling dome to the J
Authors
Zhongjie Zhang, Z. Bai, Walter D. Mooney, C. Wang, X. Chen, E. Wang, J. Teng, N. Okaya