Publications
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Volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 1995 Volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 1995
The Alaska Volcano Observatory (AVO) responded to eruptive activity or suspected volcanic activity (SVA) at 6 volcanic centers in 1995: Mount Martin (Katmai Group), Mount Veniaminof, Shishaldin, Makushin, Kliuchef/Korovin, and Kanaga. In addition to responding to eruptive activity at Alaska volcanoes, AVO also disseminated information for the Kamchatkan Volcanic Eruption Response Team...
Authors
Robert G. McGimsey, Christina A. Neal
Aeromagnetic map of the Clear Lake region on parts of the Santa Rosa and Ukih 1° by 2° quadrangles, California Aeromagnetic map of the Clear Lake region on parts of the Santa Rosa and Ukih 1° by 2° quadrangles, California
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Photographs of the 1989-90 eruptions of Redoubt Volcano, Alaska Photographs of the 1989-90 eruptions of Redoubt Volcano, Alaska
No abstract available.
Authors
A.L. Roach, Christina A. Neal, R. G. McGimsey
The Loma Prieta, California, Earthquake of October 17, 1989: Main shock characteristics The Loma Prieta, California, Earthquake of October 17, 1989: Main shock characteristics
The October 17, 1989, Loma Prieta, Calif., earthquake (0004:15.2 G.m.t. October 18; lat 37.036º N., long 121.883º W.; 19-km depth) had a local magnitude (ML) of about 6.7, a surface-wave magnitude (MS) of 7.1, a seismic moment of 2.2x1019 N-m to 3.5x1019 N-m, a source duration of 6 to 15 s, and an average stress drop of at least 50 bars. Slip occurred on a dipping fault surface about 35...
Authors
Paul A. Spudich, Gregory C. Beroza, George Choy, John Boatwright, Stephen H. Hartzell, Gordon L. Stewart, Carlos Mendoza, Stephen Horton, John G. Anderson, Andres J. Mendez, Hiroo Kanamori, Kenji Satake, Michael Lisowski, Mark Hunter Murray, Jerry L. Svarc, Grant Marshall, Ross S. Stein, Karen McNally, Gerald W. Simila, Judy G. Brown, J.L. Nabelek, Ze’ev Reches, Mark D. Zoback, Jamison Steidl, Ralph J. Archuleta, Aaron A. Velasco, Thorne Lay, Jiajun Zhang, David J. Wald, Donald V. Helmberger, Thomas H. Heaton, Chesley R. Williams, Paul Segall, Francis T. Wu, Mingdong Wu, J.W. Rudnicki
Crater Lake National Park: Presently tranquil Crater Lake National Park: Presently tranquil
No abstract available.
Authors
Hans Nelson, Charles R. Bacon
Geodetic monitoring of the southern San Andreas Fault, California, 1980-1991 Geodetic monitoring of the southern San Andreas Fault, California, 1980-1991
Five geodetic arrays (10 to 40 km aperture) located along the San Andreas fault have been surveyed frequently (several times in most years) over the 1980–1991 interval to detect possible fluctuations in the deformation rate. In each survey of an array the distances between the same four to seven pairs of geodetic monuments were measured. The distances measured (with corresponding...
Authors
James C. Savage, Michael Lisowski
Trace metals and major and rare earth elements in cuttings from five high-temperature wells in the northwest region of The Geysers, California, vapor-dominated geothermal system Trace metals and major and rare earth elements in cuttings from five high-temperature wells in the northwest region of The Geysers, California, vapor-dominated geothermal system
Temperatures within the main vapor-dominated steam reservoir at The Geysers geothermal field generally are in the range 238°C to 244°C. A few deep wells in the northwestern part of the field have penetrated beneath this reservoir into a second vapor-dominated reservoir where temperatures are >315°C, while vapor pressure remains nearly constant at about 35.9 bars (Walters et al., 1992)...
Authors
Robert O. Fournier, Joseph N. Moore
Composition of waters from the research drill hole at the summit of Kilauea Volcano, Hawaii; 1973-1991 Composition of waters from the research drill hole at the summit of Kilauea Volcano, Hawaii; 1973-1991
No abstract available.
Authors
Robert I. Tilling, Blair F. Jones
The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive
No abstract available.
Authors
Margaret T. Mangan, C. C. Heliker, T. N. Mattox, J. P. Kauahikaua, Rosalind Tuthill Helz, B. C. Hearn
Cerro Prieto geothermal field, Mexico; chemical analyses and other data for 58 samples collected in 1977-1979 Cerro Prieto geothermal field, Mexico; chemical analyses and other data for 58 samples collected in 1977-1979
This report releases the results of selected chemical analyses by the USGS of fluids collected from geothennal power production wells at the Cerro Prieto Geothennal Field, Mexico. Cerro Prieto, the world's largest producing hot-water geothennal field, is located 32 km southeast of Mexicali, Baja California. Comision Federal de Electricidad de Mexico (CFE) gave permission for, and...
Hydrologic effects associated with the June 28, 1992 Landers, California, earthquake sequence Hydrologic effects associated with the June 28, 1992 Landers, California, earthquake sequence
No abstract available.
Authors
E.A. Roeloffs, W.R. Danskin, C. D. Farrar, D. L. Galloway, S. N. Hamlin, E.G. Quilty, H.M. Quinn, D. H. Schaefer, M.L. Sorey, D.E. Woodcock