Publications
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Three-dimensional P and S wave velocity structure of Redoubt Volcano, Alaska Three-dimensional P and S wave velocity structure of Redoubt Volcano, Alaska
The three‐dimensional P and S wave structure of Redoubt Volcano, Alaska, and the underlying crust to depths of 7–8 km is determined from 6219 P wave and 4008 S wave first‐arrival times recorded by a 30‐station seismograph network deployed on and around the volcano. First‐arrival times are calculated using a finite‐difference technique, which allows for flexible parameterization of the...
Authors
H.M. Benz, B. A. Chouet, P.B. Dawson, J.C. Lahr, R.A. Page, J.A. Hole
Sedimentary processes in a tectonically active region: Puerto Rico north insular slope Sedimentary processes in a tectonically active region: Puerto Rico north insular slope
No abstract available.
Authors
Kathryn M. Scanlon, Douglas G. Masson
Chemical analyses for the geologic map of the Island of Hawaii Chemical analyses for the geologic map of the Island of Hawaii
No abstract available.
Authors
E.W. Wolfe
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 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
Slope map and locations of irrigation-induced landslides and seepage areas, Hagerman Fossil Beds National Monument, Idaho 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
Geothermal resources in the Crater Lake area, Oregon Geothermal resources in the Crater Lake area, Oregon
No abstract available.
Authors
Charles R. Bacon, Manuel Nathenson
Gull of Mexico and Caribbean EEZ: Part III Gull of Mexico and Caribbean EEZ: Part III
No abstract available.
Authors
David C. Twichell, Kathryn M. Scanlon, William P. Dillon
Sedimentary processes in the salt deformation province of the Texas-Louisiana continental slope Sedimentary processes in the salt deformation province of the Texas-Louisiana continental slope
No abstract available.
Authors
David C. Twichell, Catherine M. Delorey
Type of faulting and orientation of stress and strain as a function of space and time in Kilauea's south flank, Hawaii Type of faulting and orientation of stress and strain as a function of space and time in Kilauea's south flank, Hawaii
Earthquake focal mechanisms of events occurring between 1972 and 1992 in the south flank of Kilauea volcano, Hawaii, are used to infer the state of stress and strain as a function of time and space. We have determined 870 fault plane solutions from P wave first motion polarities for events with magnitudes ML ≥ 2.5 and depth ranging between 6 and 12 km. Faulting is characterized by a...
Authors
D. Gillard, M. Wyss, P. Okubo
Use of precipitation and groundwater isotopes to interpret regional hydrology on a tropical volcanic island: Kilauea volcano area, Hawaii Use of precipitation and groundwater isotopes to interpret regional hydrology on a tropical volcanic island: Kilauea volcano area, Hawaii
Isotope tracer methods were used to determine flow paths, recharge areas, and relative age for groundwater in the Kilauea volcano area of the Island of Hawaii. A network of up to 66 precipitation collectors was emplaced in the study area and sampled twice yearly for a 3-year period. Stable isotopes in rainfall show three distinct isotopic gradients with elevation, which are correlated...
Authors
M. A. Scholl, S. E. Ingebritsen, C. J. Janik, J. P. Kauahikaua
The Springdale, Utah, landslide: An extraordinary event The Springdale, Utah, landslide: An extraordinary event
The most dramatic geologic effect of the M-5.7 St. George, Utah earthquake of 2 September 1992 was the triggering of the 14,000,000-m3 Springdale, Utah landslide. The roughly 10 m of landslide movement destroyed three houses, threatened several condominiums, disrupted utility lines, and temporarily closed the southwest entrance to Zion National Park. The seismic triggering of this...
Authors
R.W. Jibson, E. L. Harp
Aeromagnetic survey over U.S. to advance geomagnetic research 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...
Authors
T.G. Hildenbrand, R.J. Blakely, W. J. Hinze, Gordon R. Keller, R.A. Langel, M. Nabighian, W. Roest