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Publication Extents

Not all publications have extents, not all extents are completely accurate
Volcano-hazard zonation for San Vicente volcano, El Salvador
J. J. Major, S. P. Schilling, C.R. Pullinger, C.D. Escobar, M.M. Howell
2001, Open-File Report 2001-367
San Vicente volcano, also known as Chichontepec, is one of many volcanoes along the volcanic arc in El Salvador. This composite volcano, located about 50 kilometers east of the capital city San Salvador, has a volume of about 130 cubic kilometers, rises to an altitude of about 2180 meters, and...
Lahar-hazard zonation for San Miguel volcano, El Salvador
J. J. Major, S. P. Schilling, C.R. Pullinger, C.D. Escobar, C.A. Chesner, M.M. Howell
2001, Open-File Report 2001-395
San Miguel volcano, also known as Chaparrastique, is one of many volcanoes along the volcanic arc in El Salvador. The volcano, located in the eastern part of the country, rises to an altitude of about 2130 meters and towers above the communities of San Miguel, El Transito, San Rafael Oriente,...
Use of InSAR to identify land-surface displacements caused by aquifer-system compaction in the Paso Robles area, San Luis Obispo County, California, March to August 1997
David W. Valentine, Jill N. Densmore, Devin L. Galloway, Falk Amelung
2001, Open-File Report 2000-447-B
The population in San Luis Obispo County has grown steadily during the 1990s, and some land use has been converted from dry farming to grazing to irrigated vineyards and urban areas. Because insufficient surface-water supplies are available to meet the growing demand, ground-water pumpage has increased and the resulting water-level...
Lahar hazards at Mombacho Volcano, Nicaragua
J.W. Vallance, S. P. Schilling, G. Devoli
2001, Open-File Report 2001-455
Mombacho volcano, at 1,350 meters, is situated on the shores of Lake Nicaragua and about 12 kilometers south of Granada, a city of about 90,000 inhabitants. Many more people live a few kilometers southeast of Granada in 'las Isletas de Granada and the nearby 'Peninsula de Aseses. These areas are...
Hawaiian Volcano Observatory summary 100; Part 1, seismic data, January to December 2000
Jennifer S. Nakata
2001, Open-File Report 2001-332
The Hawaiian Volcano Observatory (HVO) summary presents seismic data gathered during the year and a chronological narrative describing the volcanic events. The seismic summary is offered without interpretation as a source of preliminary data. It is complete in the sense that all data for events of M≥1.5 routinely gathered by...
Selected hydrologic data for Cedar Valley, Iron County, southwestern Utah, 1930-2001
James H. Howells, James L. Mason, Bradley A. Slaugh
2001, Open-File Report 2001-419
This report presents hydrologic data collected by the U. S. Geological Survey from 1930 to 2001 with emphasis on data collected from 1997 to 2001 as part of a study of ground-water resources in Cedar Valley, Iron County, southwestern Utah (fig. 1). Data collected prior to this study are also...
Occurrence and distribution of selected contaminants in public drinking-water supplies in the surficial aquifer in Delaware
Matthew J. Ferrari
2001, Open-File Report 2001-327
Water samples were collected from August through November 2000 from 30 randomly selected public drinking-water supply wells screened in the unconfined aquifer in Delaware, and analyzed to assess the occurrence and distribution of selected pesticide compounds, volatile organic compounds, major inorganic ions, and nutrients. Water from a subset of 10...
Volcano hazards at Fuego and Acatenango, Guatemala
J.W. Vallance, S. P. Schilling, O. Matias, William I. Rose Jr., M.M. Howell
2001, Open-File Report 2001-431
The Fuego-Acatenango massif comprises a string of five or more volcanic vents along a north-south trend that is perpendicular to that of the Central American arc in Guatemala. From north to south known centers of volcanism are Ancient Acatenango, Yepocapa, Pico Mayor de Acatenango, Meseta, and Fuego. Volcanism along the...
Gravity and Magnetic Surveys Over the Santa Rita Fault System, Southeastern Arizona
Mary Hegmann
2001, Open-File Report 2001-503
Gravity and magnetic surveys were performed in the northeast portion of the Santa Rita Experimental Range, in southeastern Arizona, to identify faults and gain a better understanding of the subsurface geology. A total of 234 gravity stations were established, and numerous magnetic data were collected with portable and truck-mounted proton precession...
Borehole P- and S-wave velocity at thirteen stations in Southern California
James F. Gibbs, David M. Boore, John C. Tinsley III, Charles S. Mueller
2001, Open-File Report 2001-506
The U.S. Geological Survey (USGS), as part of a program to acquire seismic velocity data at locations of strong-ground motion in earthquakes (e.g., Gibbs et al., 2000), has investigated thirteen additional sites in the Southern California region. Of the thirteen sites, twelve are in the vicinity of Whittier, California, and...
Chemical composition of strata of the Meade Peak Phosphatic Shale Member of the Permian Phosphoria Formation: Channel-composited and individual rock samples of measured section J and their relationship of measured sections A and B, central part of Rasmussen Ridge, Caribou County, Idaho
J. R. Herring, R. I. Grauch, D. F. Siems, R. G. Tysdal, E. A. Johnson, R. A. Zielinski, G. A. Desborough, A. Knudsen, M. E. Gunter
2001, Open-File Report 2001-195
This study, one in a series, reports bulk chemical composition of rock samples collected from a core, referred to as Measured Section J, drilled at a site that subsequently was developed into the Enoch Valley phosphate mine in southeastern Idaho. The core is continuous and cuts through the entire thickness...
Volcano hazards in the San Salvador region, El Salvador
J. J. Major, S. P. Schilling, D.J. Sofield, C.D. Escobar, C.R. Pullinger
2001, Open-File Report 2001-366
San Salvador volcano is one of many volcanoes along the volcanic arc in El Salvador (figure 1). This volcano, having a volume of about 110 cubic kilometers, towers above San Salvador, the country’s capital and largest city. The city has a population of approximately 2 million, and a population density...
Lahar hazards at Agua volcano, Guatemala
S. P. Schilling, J.W. Vallance, O. Matias, M.M. Howell
2001, Open-File Report 2001-432
At 3760 m, Agua volcano towers more than 3500 m above the Pacific coastal plain to the south and 2000 m above the Guatemalan highlands to the north. The volcano is within 5 to 10 kilometers (km) of Antigua, Guatemala and several other large towns situated on its northern apron....