Publications
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Noble gas isotopes in mineral springs within the Cascadia Forearc, Washington and Oregon
This U.S. Geological Survey report presents laboratory analyses along with field notes for a pilot study to document the relative abundance of noble gases in mineral springs within the Cascadia forearc of Washington and Oregon. Estimates of the depth to the underlying Juan de Fuca oceanic plate beneath the sample sites are derived from the McCrory and others (2012) slab model. Some of these spring
Authors
Patricia A. McCrory, James E. Constantz, Andrew G. Hunt
Response of a tall building far from the epicenter of the 11 March 2011 M 9.0 Great East Japan earthquake and aftershocks
The 11 March 2011 M 9.0 Great East Japan earthquake generated significant long-duration shaking that propagated hundreds of kilometers from the epicenter and affected urban areas throughout much of Honshu. Recorded responses of a tall building at 770 km from the epicenter of the mainshock and other related or unrelated events show how structures sensitive to long-period motions can be affected by
Authors
Mehmet Çelebi, Masanori Iiba, Izuru Okawa, Toshidate Kashima, Shin Koyama
Response and recovery lessons from the 2010-2011 earthquake sequence in Canterbury, New Zealand
The impacts and opportunities that result when low-probability moderate earthquakes strike an urban area similar to many throughout the US were vividly conveyed in a one-day workshop in which social and Earth scientists, public officials, engineers, and an emergency manager shared their experiences of the earthquake sequence that struck the city of Christchurch and surrounding Canterbury region of
Authors
Mark Pierepiekarz, David Johnston, Kelvin Berryman, John Hare, Joan S. Gomberg, Robert A. Williams, Craig S. Weaver
Triggering of repeating earthquakes in central California
Dynamic stresses carried by transient seismic waves have been found capable of triggering earthquakes instantly in various tectonic settings. Delayed triggering may be even more common, but the mechanisms are not well understood. Catalogs of repeating earthquakes, earthquakes that recur repeatedly at the same location, provide ideal data sets to test the effects of transient dynamic perturbations
Authors
Chunquan Wu, Joan Gomberg, Eli Ben-Naim, Paul Johnson
Observations of static Coulomb stress triggering of the November 2011 M5.7 Oklahoma earthquake sequence
In November 2011, a M5.0 earthquake occurred less than a day before a M5.7 earthquake near Prague, Oklahoma, which may have promoted failure of the mainshock and thousands of aftershocks along the Wilzetta fault, including a M5.0 aftershock. The M5.0 foreshock occurred in close proximity to active fluid injection wells; fluid injection can cause a buildup of pore fluid pressure, decrease the fault
Authors
Danielle F. Sumy, Elizabeth S. Cochran, Katie M. Keranen, Maya Wei, Geoffrey A. Abers
The 1964 Great Alaska Earthquake and tsunamis: a modern perspective and enduring legacies
The magnitude 9.2 Great Alaska Earthquake that struck south-central Alaska at 5:36 p.m. on Friday, March 27, 1964, is the largest recorded earthquake in U.S. history and the second-largest earthquake recorded with modern instruments. The earthquake was felt throughout most of mainland Alaska, as far west as Dutch Harbor in the Aleutian Islands some 480 miles away, and at Seattle, Washington, more
Authors
Thomas M. Brocher, John R. Filson, Gary S. Fuis, Peter J. Haeussler, Thomas L. Holzer, George Plafker, J. Luke Blair
Rapid earthquake characterization using MEMS accelerometers and volunteer hosts following the M 7.2 Darfield, New Zealand, Earthquake
We test the feasibility of rapidly detecting and characterizing earthquakes with the Quake‐Catcher Network (QCN) that connects low‐cost microelectromechanical systems accelerometers to a network of volunteer‐owned, Internet‐connected computers. Following the 3 September 2010 M 7.2 Darfield, New Zealand, earthquake we installed over 180 QCN sensors in the Christchurch region to record the aftershoc
Authors
J. F. Lawrence, E.S. Cochran, A. Chung, A. Kaiser, C. M. Christensen, R. Allen, J.W. Baker, B. Fry, T. Heaton, Debi Kilb, M.D. Kohler, M. Taufer
The profound reach of the 11 April 2012 M 8.6 Indian Ocean earthquake: Short‐term global triggering followed by a longer‐term global shadow
The 11 April 2012 M 8.6 Indian Ocean earthquake was an unusually large intraoceanic strike‐slip event. For several days, the global M≥4.5 and M≥6.5 seismicity rate at remote distances (i.e., thousands of kilometers from the mainshock) was elevated. The strike‐slip mainshock appears through its Love waves to have triggered a global burst of strike‐slip aftershocks over several days. But the M≥6.5 r
Authors
Fred Pollitz, Roland Burgmann, Ross S. Stein, Volkan Sevilgen
Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012
The primary purpose of this report is to provide drafted field logs of exploratory trenches excavated across the Berryessa Fault section of the northern Green Valley Fault (Lienkaemper, 2012; Lienkaemper and others, 2013) in 2011 and 2012 that show evidence for at least one surface-rupturing earthquake in the past few centuries. The site location and site detail are shown on sheet 1. The trench lo
Authors
James J. Lienkaemper, Carla M. Rosa, Ian J. Cappelle, Evan M. Wolf, Nichole E. Knepprath, Lucille A. Piety, Sarah A. Derouin, Liam M. Reidy, Joanna L. Redwine, Robert R. Sickler
Photomosaics and event evidence from the Frazier Mountain paleoseismic site, trench 1, cuts 1–4, San Andreas Fault Zone, southern California (2007–2009)
The Frazier Mountain paleoseismic site is located at the northwest end of the Mojave section of the San Andreas Fault, in a small, closed depression at the base of Frazier Mountain near Tejon Pass, California (lat 34.8122° N., long 118.9034° W.). The site was known to contain a good record of earthquakes due to previous excavations by Lindvall and others (2002). This report provides data resulting
Authors
Katherine M. Scharer, Tom E. Fumal, Ray J. Weldon, Ashley R. Streig
Quantitative study of tectonic geomorphology along Haiyuan fault based on airborne LiDAR
High-precision and high-resolution topography are the fundamental data for active fault research. Light detection and ranging (LiDAR) presents a new approach to build detailed digital elevation models effectively. We take the Haiyuan fault in Gansu Province as an example of how LiDAR data may be used to improve the study of active faults and the risk assessment of related hazards. In the eastern s
Authors
Tao Chen, Pei Zhen Zhang, Jing Liu, Chuan You Li, Zhi Kun Ren, Kenneth W. Hudnut
Performance of several low-cost accelerometers
Several groups are implementing low‐cost host‐operated systems of strong‐motion accelerographs to support the somewhat divergent needs of seismologists and earthquake engineers. The Advanced National Seismic System Technical Implementation Committee (ANSS TIC, 2002), managed by the U.S. Geological Survey (USGS) in cooperation with other network operators, is exploring the efficacy of such systems
Authors
J.R. Evans, R. M. Allen, A. I. Chung, E.S. Cochran, R. Guy, M. Hellweg, J. F. Lawrence