Publications
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Intensity, magnitude, location and attenuation in India for felt earthquakes since 1762 Intensity, magnitude, location and attenuation in India for felt earthquakes since 1762
A comprehensive, consistently interpreted new catalog of felt intensities for India (Martin and Szeliga, 2010, this issue) includes intensities for 570 earthquakes; instrumental magnitudes and locations are available for 100 of these events. We use the intensity values for 29 of the instrumentally recorded events to develop new intensity versus attenuation relations for the Indian...
Authors
Walter Szeliga, Susan Hough, Stacey Martin, Roger G. Bilham
Tree-ring dated landslide movements and seismic events in southwestern Montana, USA Tree-ring dated landslide movements and seismic events in southwestern Montana, USA
Because many tree species can live for several centuries or longer (Brown 1996), tree-ring analysis can be a valuable tool to date geomorphic events such as landslides, earthquakes, and avalanches in regions lacking long historical records. Typically, a catastrophic landslide will destroy all trees on the landslide, but trees on slower moving landslides may survive. For example, the...
Authors
Paul E. Carrara, J. Michael O’Neill
Migrating tremors illuminate complex deformation beneath the seismogenic San Andreas fault Migrating tremors illuminate complex deformation beneath the seismogenic San Andreas fault
The San Andreas fault is one of the most extensively studied faults in the world, yet its physical character and deformation mode beneath the relatively shallow earthquake-generating portion remain largely unconstrained. Tectonic ‘non-volcanic’ tremor, a recently discovered seismic signal probably generated by shear slip on the deep extension of some major faults, can provide new insight...
Authors
David R. Shelly
Geomorphic knobs of Candor Chasma, Mars: New Mars Reconnaissance Orbiter data and comparisons to terrestrial analogs Geomorphic knobs of Candor Chasma, Mars: New Mars Reconnaissance Orbiter data and comparisons to terrestrial analogs
High Resolution Imaging Science Experiment (HiRISE) imagery and digital elevation models of the Candor Chasma region of Valles Marineris, Mars, reveal prominent and distinctive positive-relief knobs amidst light-toned layers. Three classifications of knobs, Types 1, 2, and 3, are distinguished from a combination of HiRISE and Thermal Emission Imaging System (THEMIS) images based on...
Authors
Marjorie A. Chan, Jens Ormö, Scott L. Murchie, Chris Okubo, Goro Komatsu, James J. Wray, Patrick E. McGuire, James A. McGovern
Lunar Reconnaissance Orbiter Camera (LROC) instrument overview Lunar Reconnaissance Orbiter Camera (LROC) instrument overview
The Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC) and Narrow Angle Cameras (NACs) are on the NASA Lunar Reconnaissance Orbiter (LRO). The WAC is a 7-color push-frame camera (100 and 400 m/pixel visible and UV, respectively), while the two NACs are monochrome narrow-angle linescan imagers (0.5 m/pixel). The primary mission of LRO is to obtain measurements of the Moon...
Authors
M.S. Robinson, S.M. Brylow, M. Tschimmel, D. Humm, S.J. Lawrence, P.C. Thomas, B.W. Denevi, E. Bowman-Cisneros, J. Zerr, M.A. Ravine, M.A. Caplinger, F.T. Ghaemi, J.A. Schaffner, M. C. Malin, P. Mahanti, A. Bartels, J. Anderson, T.N. Tran, E. M. Eliason, A. S. McEwen, E. Turtle, B.L. Jolliff, H. Hiesinger
The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP) The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP)
The High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter (MRO) acquired 8 terapixels of data in 9137 images of Mars between October 2006 and December 2008, covering ∼0.55% of the surface. Images are typically 5–6 km wide with 3-color coverage over the central 20% of the swath, and their scales usually range from 25 to 60 cm/pixel. Nine hundred and sixty...
Authors
Alfred S. McEwen, Maria E. Banks, Nicole Baugh, Kris J. Becker, Aaron Boyd, James W. Bergstrom, Ross A. Beyer, Edward Bortolini, Nathan T. Bridges, Shane Byrne, Bradford Castalia, Frank C. Chuang, Larry S. Crumpler, Ingrid J. Daubar, Alix K. Davatzes, Donald G. Deardorff, Alaina DeJong, W. Alan Delamere, Eldar Z. Noe Dobrea, Colin M. Dundas, Eric M. Eliason, Yisrael Espinoza, Audrie Fennema, Kathryn E. Fishbaugh, Terry Forrester, Paul E. Geissler, John A. Grant, Jennifer L. Griffes, John P. Grotzinger, Virginia C. Gulick, Candice J. Hansen, Kenneth E. Herkenhoff, Rodney Heyd, Windy L. Jaeger, Dean Jones, Bob Kanefsky, Laszlo P. Keszthelyi, Robert King, Randolph L. Kirk, Kelly J. Kolb, Jeffrey Lasco, Alexandra Lefort, Richard Leis, Kevin W. Lewis, Sara Martinez-Alonso, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Joannah Metz, Moses P. Milazzo, Ralph E. Milliken, Tahirih Motazedian, Chris Okubo, Albert Ortiz, Andrea J. Philippoff, Joseph Plassmann, Anjani Polit, Patrick S. Russell, Christian Schaller, Mindi L. Searls, Timothy Spriggs, Steve W. Squyres, Steven Tarr, Nicolas Thomas, Bradley J. Thomson, Livio L. Tornabene, Charlie Van Houten, Circe Verba, Catherine M. Weitz, James J. Wray
Monitoring and characterizing natural hazards with satellite InSAR imagery Monitoring and characterizing natural hazards with satellite InSAR imagery
Interferometric synthetic aperture radar (InSAR) provides an all-weather imaging capability for measuring ground-surface deformation and inferring changes in land surface characteristics. InSAR enables scientists to monitor and characterize hazards posed by volcanic, seismic, and hydrogeologic processes, by landslides and wildfires, and by human activities such as mining and fluid...
Authors
Zhong Lu, Jixian Zhang, Yonghong Zhang, Daniel Dzurisin
Reducing landslide hazards through federal, state, and local government cooperation: the Seattle, Washington, experience Reducing landslide hazards through federal, state, and local government cooperation: the Seattle, Washington, experience
No abstract available.
Authors
P. L. Gori, Inc. Jane Preuss - Planwest Partners
Coregistration of Mars Orbiter Laser Altimeter (MOLA) topography with high-resolution Mars images Coregistration of Mars Orbiter Laser Altimeter (MOLA) topography with high-resolution Mars images
Spacecraft continue to send back extraordinary amounts of data from Mars leaving scientists with the considerable task of analyzing an ever-increasing wealth of information. There are abundant uses for coregistered topography and images, but coregistering various datasets can be time-consuming and labor-intensive. We have developed a set of C-shell Unix scripts and Interactive Data...
Authors
Kelly J. Kolb, Chris H. Okubo
Direct calculation of the probability distribution for earthquake losses to a portfolio Direct calculation of the probability distribution for earthquake losses to a portfolio
We demonstrate a direct method for the calculation of the annual frequency of exceedance for earthquake losses (or the probability distribution for annual losses) to a portfolio. This method parallels the classic method of probabilistic seismic hazard analysis for the calculation of the annual frequency of exceedance for earthquake ground motions. The method assumes conditional...
Authors
Robert L. Wesson, David M. Perkins, Nico Luco, Erdem Karaca
Evansville Area Earthquake Hazards Mapping Project (EAEHMP)— Progress report, 2008 Evansville Area Earthquake Hazards Mapping Project (EAEHMP)— Progress report, 2008
Maps of surficial geology, deterministic and probabilistic seismic hazard, and liquefaction potential index have been prepared by various members of the Evansville Area Earthquake Hazard Mapping Project for seven quadrangles in the Evansville, Indiana, and Henderson, Kentucky, metropolitan areas. The surficial geologic maps feature 23 types of surficial geologic deposits, artificial fill...
Authors
Oliver S. Boyd, Jennifer L. Haase, David W. Moore
Constraints on the stress state of the San Andreas fault with analysis based on core and cuttings from SAFOD drilling phases 1 and 2 Constraints on the stress state of the San Andreas fault with analysis based on core and cuttings from SAFOD drilling phases 1 and 2
Analysis of field data has led different investigators to conclude that the San Andreas Fault (SAF) has either anomalously low frictional sliding strength (μ 0.2) or strength consistent with standard laboratory tests (μ > 0.6). Arguments for the apparent weakness of the SAF generally hinge on conceptual models involving intrinsically weak gouge or elevated pore pressure within the fault...
Authors
Cheryl Tembe, David A. Lockner, Teng-fong Wong