Publications
Educational Publications
Educational Publications
Selected publications about earthquakes In plain language.
Filter Total Items: 2877
Report on list of structures recommended for seismic instrumentation in the Puget Sound area, Washington Report on list of structures recommended for seismic instrumentation in the Puget Sound area, Washington
No abstract available.
Authors
B. M. Olsen, P. Grant, Mehmet Çelebi
Earthquakes & Volcanoes, Volume 21, Number 1, 1989: Featuring the U.S. Geological Survey's National Earthquake Information Center in Golden, Colorado, USA Earthquakes & Volcanoes, Volume 21, Number 1, 1989: Featuring the U.S. Geological Survey's National Earthquake Information Center in Golden, Colorado, USA
Earthquakes and Volcanoes is published bimonthly by the U.S. Geological Survey to provide current information on earthquakes and seismology, volcanoes, and related natural hazards of interest to both generalized and specialized readers. The Secretary of the Interior has determined that the publication of this periodical is necessary in the transaction of the public business required by...
Authors
Henry Spall, Diane C. Schnabel
IRIS/USGS plans for upgrading the Global Seismograph Network IRIS/USGS plans for upgrading the Global Seismograph Network
This report has been prepared to provide information to organizations that may be asked to participate in a program to upgrade the global seismographic network. In most cases, the organizations that will be offered new instrumentation by the U.S. Geological Survey currently operate stations in the World-Wide Standardized Seismograph Network (WWSSN) or the Global Digital Seismograph...
Authors
Jon Peterson, Charles R. Hutt
A direct method for calculating instrument noise levels in side-by-side seismometer evaluations A direct method for calculating instrument noise levels in side-by-side seismometer evaluations
The subject of determining the inherent system noise levels present in modem broadband closed loop seismic sensors has been an evolving topic ever since closed loop systems became available. Closed loop systems are unique in that the system noise can not be determined via a blocked mass test as in older conventional open loop seismic sensors. Instead, most investigators have resorted to...
Authors
L. Gary Holcomb
A broad-band, wide-dynamic range, strong-motion array near Parkheld, California, USA for measurement of acceleration and volumetric strain A broad-band, wide-dynamic range, strong-motion array near Parkheld, California, USA for measurement of acceleration and volumetric strain
No abstract available.
Authors
Roger D. Borcherdt, Malcolm J. S. Johnston, Thomas Noce, Gary Glassmoyer, Douglas Myren
Vertical seismic profiling of Oroville microearthquakes: Velocity spectra and particle motion as a function of depth Vertical seismic profiling of Oroville microearthquakes: Velocity spectra and particle motion as a function of depth
Direct evidence of site distortion of P- and S-wave microearthquake source spectra at Oroville, California, is presented. The data were gathered by placing vertical and three-component seismometers at 90 m intervals in a 500 m borehole through the Cleveland Hill normal fault, on which the 1975, ML = 5.7 Oroville earthquake took place. High-pressure, hydraulic locking mechanisms were used...
Authors
P. E. Malin, J. A. Waller, Roger D. Borcherdt, E. Cranswick, Edward G. Jensen, J. Van Schaak
Friction of ice Friction of ice
The frictional strength of ice seems to be well below that for all other rocks. Triaxial testing of cylinders of pure water ice containing a 45° inclined sawcut, at temperatures of 77 ≤ T ≤ 115 K and confining pressures 0.1 ≤ P ≤ 250 MPa, reveals the frictional laws τ = 0.20 σn + 8.3 MPa for P ≥ 10 MPa and τ = 0.55 σn + 1.0 MPa for P ≤ 5 MPa, where τ and σn are the shear and normal...
Authors
M. L. Beeman, W.B. Durham, Stephen H. Kirby
Recording strong motion studies Recording strong motion studies
Instruments now permit strong‐motion signals to be recorded over broader band widths, with wider dynamic range and signal resolution and with better data accessibility via computer. These advantages are utilized by the General Earthquake Observation System (GEOS) developed by the United States Geological Survey, by which a microcomputer‐controlled system provides improved strong‐motion...
Authors
Roger D. Borcherdt
Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure
A 180-km-long seismic refraction transect from the eastern High Cascades, across Newberry Volcano, to the eastern High Lava Plains is used to investigate the subvolcanic crustal and upper mantle velocity structure there. Near-surface volcanic flows and sedimentary debris (1.6-4.7 km/s), ranging from 3 to 5 km in thickness, overlie subvolcanic Basin and Range structures. East and west of...
Authors
R. D. Catchings, Walter D. Mooney
Report on recommended list of structures for seismic instrumentation in the Boston Region Report on recommended list of structures for seismic instrumentation in the Boston Region
No abstract available.
Authors
Mehmet Çelebi
Geologic and hydrologic investigations of a potential nuclear waste disposal site at Yucca Mountain, southern Nevada Geologic and hydrologic investigations of a potential nuclear waste disposal site at Yucca Mountain, southern Nevada
Crustal velocity sections based on two seismic-refraction profiles are presented for the area west of Yucca Mountain, Nye County, Nevada. The Crater Flat profile is interpreted in terms of six velocity layers ranging from 1.5 to 6.1 km/s. Interpretation of the Beatty profile reveals an escarpment near the northeast edge of Bare Mountain, where Paleozoic rocks are probably down-faulted...