Publications
Filter Total Items: 2573
The "LARSE" Project - Working Toward a Safer Future for Los Angeles
The Los Angeles region is underlain by a network of active faults, including many that are deep and do not break the Earth's surface. These hidden faults include the previously unknown one responsible for the devastating January 1994 Northridge earthquake, the costliest quake in U.S. history. So that structures can be built or strengthened to withstand the quakes that are certain in the future, th
Authors
Thomas L. Henyey, Gary S. Fuis, Mark L. Benthien, Thomas R. Burdette, Shari A. Christofferson, Robert W. Clayton, Paul M. Davis, James W. Hendley, Monica D. Kohler, William J. Lutter, John K. McRaney, Janice M. Murphy, David A. Okaya, Trond Ryberg, Gerald W. Similia, Peter H. Stauffer
Calibration formulae and values for velocity seismometers used in the 1998 Santa Clara Valley, California seismic experiment
Eaton (1975), Bakun and Dratler (1976), Eaton (1977), Healy and O’Neil (1977), Asten (1977), Stewart and O'Neill (1980), Liu and Peselnick (1986), Eaton (1991), Rodgers et al. (1995), and many others (see Asten (1977) for a list of earlier references) have presented formulae for calculating the damped generator constant (or motor constant), and the damping constant (or fractional damping ratio) fo
Authors
Allan Goddard Lindh, Jerry P. Eaton, Mary O'Neill Allen, John H. Healy, Samuel W. Stewart, Lu Damerell
Cruise report for O1-99-SC Southern California Earthquake Hazards project
The focus of the Southern California Earthquake Hazards project is to identify the landslide and earthquake hazards and related ground-deformation processes occurring in the offshore areas that have significant potential to impact the inhabitants of the Southern California coastal region. The project activity is supported through the Coastal and Marine Geology Program of the Geologic Division of t
Authors
William R. Normark, Jane A. Reid, Ray W. Sliter, David Holton, Christina E. Gutmacher, Michael A. Fisher, Jonathan R. Childs
McVCO handbook 1999
McVCO is a microcontroller-based frequency generator that replaces the voltage controlled oscillator (VCO) used in the analog telemetry of seismic data. It accepts low-level signals from a seismometer and produces a frequency modulated subcarrier suitable for radio or telephone links to a data collection site.
McVCO was designed for the purpose of improving the analog telemetry of signals within
Authors
P.J. McChesney
Effect of baseline corrections on response spectra for two recordings of the 1999 Chi-Chi, Taiwan, earthquake
Displacements derived from the accelerogram recordings of the 1999 Chi-Chi, Taiwan earthquake at stations TCU078 and TCU129 show drifts when only a simple baseline derived from the pre-event portion of the record is removed from the records. The appearance of the velocity and displacement records suggests that changes in the zero-level of the acceleration are responsible for these drifts. The sour
Authors
David M. Boore
Earthquake probabilities in the San Francisco Bay region: 2000 to 2030 - A summary of findings
The San Francisco Bay region sits astride a dangerous “earthquake machine,” the tectonic boundary between the Pacific and North American Plates. The region has experienced major and destructive earthquakes in 1838, 1868, 1906, and 1989, and future large earthquakes are a certainty. The ability to prepare for large earthquakes is critical to saving lives and reducing damage to property and infrastr
Authors
High-resolution seismic reflection/refraction imaging from Interstate 10 to Cherry Valley Boulevard, Cherry Valley, Riverside County, California: Implications for water resources and earthquake hazards
This report is the second of two reports on seismic imaging investigations conducted by the U.S. Geological Survey (USGS) during the summers of 1997 and 1998 in the Cherry Valley area in California (Figure 1a). In the first report (Catchings et al., 1999), data and interpretations were presented for four seismic imaging profiles (CV-1, CV-2, CV-3, and CV-4) acquired during the summer of 1997 . In
Authors
G. Gandhok, R. D. Catchings, M. R. Goldman, E. Horta, M. J. Rymer, P. Martin, A. Christensen
A physically-based earthquake recurrence model for estimation of long-term earthquake probabilities
A physically-motivated model for earthquake recurrence based on the Brownian relaxation oscillator is introduced. The renewal process defining this point process model can be described by the steady rise of a state variable from the ground state to failure threshold as modulated by Brownian motion. Failure times in this model follow the Brownian passage time (BPT) distribution, which is specified
Authors
William L. Ellsworth, Mark V. Matthews, Robert M. Nadeau, Stuart P. Nishenko, Paul A. Reasenberg, Robert W. Simpson
Manual del McVCO 1999
El McVCO es un generador de frecuencias basado en un microcontrolador que reemplaza al oscilador controlado por voltaje (VCO) utilizado en telemetría analógica de datos sísmicas. Acepta señales de baja potencia desde un sismómetro y produce una señal subportadora modulada en frecuencia adecuada para enlaces telefónicos o vía radio a un lugar remoto de recolección de datos. La frecuencia de la subp
Authors
P.J. McChesney
Steady-state flow of solid CO2: Preliminary results
To help answer the question of how much solid CO2 exists in the Martian south polar cap, we performed a series of laboratory triaxial deformation experiments at constant displacement rate in compression on jacketed cylinders of pure, polycrystalline CO2. Test conditions were temperatures 150 < T < 190 K, hydrostatic confining pressures 5≤ P ≤40 MPa, and strain rates 4.5×10−8 ≤ ε ≤4.3×10−4 s−1. Mos
Authors
William B. Durham, Stephen H. Kirby, Laura A. Stern
Global Seismic Hazard Assessment Program (GSHAP) in continental Asia
The regional hazard mapping for the whole Eastern Asia was coordinated by the SSB Regional Centre in Beijing, originating from the expansion of the test area initially established in the border region of China-India-Nepal-Myanmar- Bangla Dash, in coordination with the other Regional Centres (JIPE, Moscow, and AGSO, Canberra) and with the direct assistance of the USGS. All Eastern Asian countries h
Authors
Peizhen Zhang, Zhi-xian Yang, Harsh K. Gupta, Satish C. Bhatia, Kaye M. Shedlock
Liquefaction and soil failure during 1994 Northridge earthquake
The 1994 Northridge, Calif., earthquake caused widespread permanent ground deformation on the gently sloping alluvial fan surface of the San Fernando Valley. The ground cracks and distributed deformation damaged both pipelines and surface structures. To evaluate the mechanism of soil failure, detailed subsurface investigations were conducted at four sites. Three sites are underlain by saturated sa
Authors
T.L. Holzer, Michael J. Bennett, Daniel J. Ponti, John Tinsley