Publications
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An isotope hydrology study of the Kilauea volcano area, Hawaii An isotope hydrology study of the Kilauea volcano area, Hawaii
Isotope tracer methods were used to determine flow paths, recharge areas, and relative age for ground water in the Kilauea volcano area on the Island of Hawaii. Stable isotopes in rainfall show three distinct isotopic gradients with elevation, which are correlated with trade-wind, rain shadow, and high-elevation climatological patterns. Temporal variations in isotopic composition of...
Authors
M. A. Scholl, S. E. Ingebritsen, C. J. Janik, J. P. Kauahikaua
Bench mark descriptions and photographs for global positioning system (GPS) stations in the vicinity of Mt. Shasta and Medicine Lake, California Bench mark descriptions and photographs for global positioning system (GPS) stations in the vicinity of Mt. Shasta and Medicine Lake, California
No abstract available.
Authors
K.M. Yamashita, D.E. Wieprecht
Some fluid-inclusion measurements for geothermal drill holes in California, Nevada, El Salvador, and Russia Some fluid-inclusion measurements for geothermal drill holes in California, Nevada, El Salvador, and Russia
The purpose of this report is to make available fluid-inclusion information from drill holes in five geothermal areas: The Geysers and Long Valley caldera in northern California; Steamboat Springs, Nevada; the Ahuachapan field of El Salvador, Central America; and the Mutnovsky geothermal field, Kamchatka Peninsula, Russia. These data were produced at the request of various individuals to...
Authors
Keith E. Bargar
Volcanic-hazard zonation for Mount St. Helens, Washington, 1995 Volcanic-hazard zonation for Mount St. Helens, Washington, 1995
No abstract available.
Authors
E.W. Wolfe, T.C. Pierson
The USGS/OFDA Volcano Disaster Assistance Program The USGS/OFDA Volcano Disaster Assistance Program
An erupting volcano is one of nature's truly spectacular sights. From a distance, or perhaps through the cameras of the news media, we often observe roiling mushroom clouds of ash or flows of incandescent lava issuing from the volcano's throat. If, however, you happen to live near that erupting volcano, your life or livelihood may be endangered and your property at risk of destruction a...
Authors
J.W. Ewert, C.D. Miller
Estimating heat capacity and heat content of rocks Estimating heat capacity and heat content of rocks
New heat-capacity measurements are reported for four rock types; Westerly granite from Bradford, RI, andesite from Lake County, OR, peridotite from Sonoma County, CA, and basalt from the Columbia River Group. Measurements were made on powders of the rocks in the temperature range of 340 to about 1000 K. Our measured heat-capacity values for rocks and other measurements of heat capacity...
Authors
Eugene C. Robertson, Bruch S. Hemingway
Antarctica, the dynamic heart of it all / Antarctica, the dynamic heart of it all /
No abstract available.
Authors
Alan K. Cooper, John Charles Behrendt
High-energy storms shape Puerto Rico High-energy storms shape Puerto Rico
No abstract available.
Authors
William C. Schwab
Strain accumulation along the Laguna Salada Fault, Baja California, Mexico Strain accumulation along the Laguna Salada Fault, Baja California, Mexico
Strain accumulation observed over the 1978–1991 interval in a 30×100 km aperture trilateration network spanning the Laguna Salada fault is described by the principal strain rates 0.101±0.012 strain/yr N80°E±2° and −0.021±0.012 strain/yr N10°W±2°, extension reckoned positive. These strain accumulation rates have been corrected to remove coseismic effects of the nearby 1979 Imperial Valley...
Authors
James C. Savage, Michael Lisowski, N.E. King, W.K. Gross
Postseismic deformation following the 1989 (M = 7.1): Loma Prieta, California, earthquake Postseismic deformation following the 1989 (M = 7.1): Loma Prieta, California, earthquake
Postseismic deformation along a 90‐km profile bisecting the projected surface trace of the coseismic rupture of the 1989 Loma Prieta earthquake has been monitored by frequent GPS surveys for 3.3 years following the earthquake. In addition to the expected deformation associated with secular strain accumulation on the San Andreas and Calaveras faults, deformation associated with...
Authors
James C. Savage, Michael Lisowski, Jerry L. Svarc
Strain accumulation north of Los Angeles, California, as a function of time, 1977–1992 Strain accumulation north of Los Angeles, California, as a function of time, 1977–1992
No significant change in the rate of strain accumulation in a 40×120 km trilateration network spanning the San Gabriel mountains was observed from 1977.5 to 1991.8 despite an apparent increase in seismicity (ML > 4.5) beginning in late 1987 in the northern Los Angeles basin immediately to the south. The observed deformation (0.13±0.01 µstrain/yr right‐lateral shear across a vertical...
Authors
James C. Savage, Michael Lisowski