Publications
Filter Total Items: 7221
Damage and restoration of geodetic infrastructure caused by the 1994 Northridge, California, earthquake
We seek to restore the integrity of the geodetic network in the San Fernando, Simi, Santa Clarita Valleys and in the northern Los Angeles Basin by remeasurement of the network and identification of BMs which experienced non-tectonic displacements associated with the Northridge earthquake. We then use the observed displacement of BMs in the network to portray or predict the permanent vertical and h
Authors
Kathleen M. Hodgkinson, Ross S. Stein, Kenneth W. Hudnut, Jay Satalich, John H. Richards
Earthquake technology fights crime
Scientists with the U.S. Geological Survey have adapted their methods for quickly finding the exact source of an earthquake to the problem of locating gunshots. On the basis of this work, a private company is now testing an automated gunshot-locating system in a San Francisco Bay area community. This system allows police to rapidly pinpoint and respond to illegal gunfire, helping to reduce crime i
Authors
John C. Lahr, Peter L. Ward, Peter H. Stauffer, James W. Hendley
Slope map and locations of irrigation-induced landslides and seepage areas, Hagerman Fossil Beds National Monument, Idaho
No abstract available.
Authors
Alan F. Chleborad, Philip S. Powers
Site-response maps for the Los Angeles region based on earthquake ground motions
Ground-motion records from aftershocks of the 1994 Northridge earthquake and main-shock records from the 1971 San Fernando, 1987 Whittier Narrows, 1991 Sierra Madre, and 1994 Northridge earthquakes are used to estimate site response in the urban Los Angeles, California, area. Two frequency bands are considered, 0.5-1.5 Hz and 2.0-6.0 Hz. Instrument characteristics prevented going to lower frequenc
Authors
Stephen H. Hartzell, Stephen C. Harmsen, Arthur D. Frankel, David L. Carver, Edward Cranswick, Mark E. Meremonte, John A. Michael
Rockslide-debris avalanche of May 18, 1980, Mount St. Helens Volcano, Washington
This report provides a detailed picture of the rockslide-debris avalanche of the May 18, 1980, eruption of Mount St. Helens volcano. It provides a characterization of the deposit, a reinterpretation of the details of the first minutes of the eruption of May 18, and insight into the transport mechanism of the mass movement.
Details of the rockslide event, as revealed by eyewitness photographs, are
Authors
Harry Glicken
Debris flows and landslides resulting from the June 27, 1995, storm on the North Fork of the Moormons River, Shenandoah National Park, Virginia
No abstract available.
Authors
B. A. Morgan, G. F. Wieczorek
Seismic reflection profile of the Blake Ridge near sites 994, 995, and 997
Seismic reflection profiles near Sites 994, 995, and 997 were collected with seismic sources that provide maximum resolution with adequate power to image the zone of gas hydrate stability and the region direction beneath it. The overall structure of the sediment drift deposit that constitutes the Blake Ridge consists of southwestward-dipping strata. These strata are approximately conformal to th
Authors
William P. Dillon, Deborah R. Hutchinson, Rebecca M. Drury
A review of the tectonic problems of the strike-slip northern boundary of the Caribbean Plate and examination by GLORIA
No abstract available.
Authors
William P. Dillon, N. Terence Edgar, Kathryn M. Scanlon, Dwight F. Coleman
Preliminary inventory of debris-flow and flooding effects of the June 27, 1995, storm in Madison County, Virginia showing time sequence of positions of storm-cell center
No abstract available.
Authors
G. F. Wieczorek, B. A. Morgan, R. H. Campbell, R. C. Orndorff, W. C. Burton, C. S. Southworth, J. A. Smith
Catalog of earthquake hypocenters for Augustine, Redoubt, Iliamna, and Mount Spurr volcanoes, Alaska: January 1, 1991 - December 31, 1993
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska, Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained a program of seismic monitoring at potentially active volcanoes in the Cook Inlet region since 1988. The principal objectives of this program include the seismic sur
Authors
Arthur D. Jolly, John A. Power, Scott D. Stihler, Lalitha N. Rao, Gail Davidson, John F. Paskievitch, Steve Estes, John C. Lahr
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 (KVERT) on t
Authors
Robert G. McGimsey, Christina A. Neal
Aeromagnetic survey over U.S. to advance geomagnetic research
A proposed high‐altitude survey of the United States offers an exciting and cost effective opportunity to collect magnetic‐anomaly data. Lockheed Martin Missile and Space Company is considering funding a reimbursable ER‐2 aircraft (Figure 1) mission to collect synthetic aperture radar (SAR) imagery at an altitude of about 21 km over the conterminous United States and Alaska. The collection of tota
Authors
T. G. Hildenbrand, R. J. Blakely, W. J. Hinze, Gordon R. Keller, R.A. Langel, M. Nabighian, W. Roest