Publications
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Reply to the comment on the article "40Ar/39Ar dating of tuff vents in the Campi Flegrei caldera (southern Italy): Toward a new chronostratigraphic reconstruction of the Holocene volcanic activity" by Isaia et al.
No abstract available.
Authors
L. Fedele, D.D. Insinga, A.T. Calvert, V. Morra, A. Perrotta, C. Scarpati
Extreme floods in the Black Hills area: New insights from recent research
Recent research provides clear geologic evidence that floods even larger than the lethal floods of 1972 have occurred repeatedly over recent millennia in the Black Hills of South Dakota. This information is vitally important for planning for flash flood events in this area.
The western limits of the Seattle fault zone and its interaction with the Olympic Peninsula, Washington
We present evidence that the Seattle fault zone of Washington State extends to the west edge of the Puget Lowland and is kinemati-cally linked to active faults that border the Olympic Massif, including the Saddle Moun-tain deformation zone. Newly acquired high-resolution seismic reflection and marine magnetic data suggest that the Seattle fault zone extends west beyond the Seattle Basin to form a
Authors
A.P. Lamb, L.M. Liberty, Richard J. Blakely, Thomas L. Pratt, B.L. Sherrod, K. Van Wijk
Earthquake studies reveal the magmatic plumbing system of the Katmai volcanoes
The 1912 eruption of Novarupta was the largest of the 1900s (Fierstein and Hildreth 2001, Hildreth et al. 2003). A century later, fundamental questions remain regarding the source of the magma for that eruption. A previous seismic study of the Katmai area (Jolly et al. 2007) identified a single large area of anomalous structure in the subsurface centered beneath Katmai Pass (Figure 2), but the mag
Authors
Clifford Thurber, Rachel Murphy, Stephanie G. Prejean, Matthew M. Haney, Ninfa Bennington, Lee Powell, John F. Paskievitch
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, Izuru Okawa, Toshidate Kashima, Shin Koyama, Masanori Iiba
VS30 – A site-characterization parameter for use in building Codes, simplified earthquake resistant design, GMPEs, and ShakeMaps
VS30, defined as the average seismic shear-wave velocity from the surface to a depth of 30 meters, has found wide-spread use as a parameter to characterize site response for simplified earthquake resistant design as implemented in building codes worldwide. VS30 , as initially introduced by the author for the US 1994 NEHRP Building Code, provides unambiguous definitions of site classes and site coe
Authors
Roger D. Borcherdt
Report on progress at the Center for Engineering Strong Motion Data (CESMD)
Strong-motion data of engineering and scientific importance from the United States and other seismically active countries are served through the Center for Engineering Strong Motion Data (CESMD) at www.strongmotioncenter.org. Recently, the CESMD staff, with cooperation from colleagues at international strong-motion seismic networks, has disseminated strong-motion data from significant earthquakes
Authors
H. Haddadi, A. Shakal, M. Huang, J. Parrish, C. Stephens, William U. Savage, William S. Leith
Photometric properties of Vesta
The Dawn spacecraft orbited Asteroid (4) Vesta for a year, and returned disk-resolved images and spectra covering visible and near-infrared wavelengths at scales as high as 20 m/pix. The visible geometric albedo of Vesta is ~ 0.36. The disk-integrated phase function of Vesta in the visible wavelengths derived from Dawn approach data, previous ground-based observations, and Rosetta OSIRIS observati
Authors
Jian-Yang Li, Timothy N. Titus
Stratigraphic architecture of bedrock reference section, Victoria Crater, Meridiani Planum, Mars
The Mars Exploration Rover Opportunity has investigated bedrock outcrops exposed in several craters at Meridiani Planum, Mars, in an effort to better understand the role of surface processes in its geologic history. Opportunity has recently completed its observations of Victoria crater, which is 750 m in diameter and exposes cliffs up to ~15 m high. The plains surrounding Victoria crater are ~10
Authors
Lauren A. Edgar, John P. Grotzinger, Alex G. Hayes, David M. Rubin, Steve W. Squyres, James F. Bell, Kenneth E. Herkenhoff
An atlas of Mars sedimentary rocks as seen by HiRISE
Images of distant and unknown places have long stimulated the imaginations of both explorers and scientists. The atlas of photographs collected during the Hayden (1872)expedition to the Yellowstone region was essential to its successful advocacy and selection in 1872 as America’s first national park. Photographer William Henry Jackson of the Hayden expedition captured the public’s imagination and
Authors
Ross Beyer, Kathryn M. Stack, Jennifer L. Griffes, Ralph E. Milliken, Kenneth E. Herkenhoff, Shane Byrne, John W. Holt, John P. Grotzinger
The 2011 Virginia earthquake: what are scientists learning?
Nearly 1 year ago, on 23 August, tens of millions of people in the eastern United States and southeastern Canada were startled in the middle of their workday (1:51 P.M. local time) by the sudden onset of moderate to strong ground shaking from a rare magnitude (M) 5.8 earthquake in central Virginia. Treating the shaking as if it were a fire drill, millions of workers in Washington, D. C., New York
Authors
J. Wright Horton, Robert A. Williams
Ambient response of a unique performance-based design building with dynamic response modification features
A 64-story, performance-based design building with reinforced concrete core shear-walls and unique dynamic response modification features (tuned liquid sloshing dampers and buckling-restrained braces) has been instrumented with a monitoring array of 72 channels of accelerometers. Ambient vibration data recorded are analyzed to identify modes and associated frequencies and damping. The low-amplitud
Authors
Mehmet Çelebi, Moh Huang, Antony Shakal, John Hooper, Ron Klemencic