Publications
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Geologic resource evaluation of Pu‘ukoholā Heiau National Historic Site, Hawai‘i, part II: Benthic habitat mapping
In cooperation with the U.S. National Park Service (NPS), the U.S. Geological Survey (USGS) has mapped the underwater environment in and adjacent to three parks along the Kona coast on the island of Hawai‘i. This report is the second of two produced for the NPS on the geologic resource evaluation of Pu‘ukoholā Heiau National Historic Site (PUHE) and presents benthic habitat mapping of the waters o
Authors
Susan A. Cochran, Ann E. Gibbs, Joshua B. Logan
Publications of the Volcano Hazards Program 2005
The Volcano Hazards Program of the U.S. Geological Survey (USGS) is part of the Geologic Hazards Assessments subactivity as funded by Congressional appropriation. Investigations are carried out in the Geology and Hydrology Disciplines of the USGS and with cooperators at the Alaska Division of Geological and Geophysical Surveys, University of Alaska Fairbanks Geophysical Institute, University of Ha
Authors
Manuel Nathenson
Vertical distribution of hydrogen at high northern latitudes on Mars: The Mars Odyssey Neutron Spectrometer
Neutron leakage currents measured using the Mars Odyssey Neutron Spectrometer are used to develop a two‐layer model of the distribution of hydrogen (here parameterized as water‐equivalent hydrogen, WEH) at high northern latitudes. The WEH abundance in the upper layer, Wup, was found to range between 1% and about 5%. The maximum value of the apparent thickness, D, of this upper layer peaks at about
Authors
William C. Feldman, Michael T. Mellon, Olivier Gasnault, B. Diez, R.C. Elphic, Justin Hagerty, D. J. Lawrence, S. Maurice, T.H. Prettyman
Interferometric synthetic aperture radar (InSAR)—its past, present and future
Very simply, interferometric synthetic aperture radar (InSAR) involves the use of two or more synthetic aperture radar (SAR) images of the same area to extract landscape topography and its deformation patterns. A SAR system transmits electromagnetic waves at a wavelength that can range from a few millimeters to tens of centimeters and therefore can operate during day and night under all-weather co
Authors
Zhong Lu, Oh-Ig Kwoun, R.P. Rykhus
InSAR imaging of volcanic deformation over cloud-prone areas - Aleutian islands
Interferometric synthetic aperture radar (INSAR) is capable of measuring ground-surface deformation with centimeter-tosubcentimeter precision and spatial resolution of tens-of meters over a relatively large region. With its global coverage and all-weather imaging capability, INSAR is an important technique for measuring ground-surface deformation of volcanoes over cloud-prone and rainy regions suc
Authors
Zhong Lu
Riding the storm--landslide danger in the San Francisco Bay Area
Movie Synopsis:
--A catastrophic 1982 rainstorm triggered 18,000 landslides in the Bay Area, claiming 25 lives and causing $66 million in property damage.
--The combination of steep slopes, weak rocks, and intense winter storms make Bay Area uplands an ideal setting for landslides.
--Landslides include both swift, potentially deadly debris flows and slower, but destructive deepseate
A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California
A 3-dimensional computer model of the Quaternary sequence stratigraphy in the Dominguez gap region of Long Beach, California has been developed to provide a robust chronostratigraphic framework for hydrologic and tectonic studies. The model consists of 13 layers within a 16.5 by 16.1 km (10.25 by 10 mile) square area and extends downward to an altitude of -900 meters (-2952.76 feet). Ten sequences
Authors
Daniel J. Ponti, Kenneth D. Ehman, Brian D. Edwards, John C. Tinsley, Thomas Hildenbrand, John W. Hillhouse, Randall T. Hanson, Kristen McDougall, Charles L. Powell, Elmira Wan, Michael Land, Shannon Mahan, Andrei M. Sarna-Wojcicki
Landslide hazards in the Seattle, Washington, area
The Seattle, Washington, area is known for its livability and its magnificent natural setting. The city and nearby communities are surrounded by an abundance of rivers and lakes and by the bays of Puget Sound. Two majestic mountain ranges, the Olympics and the Cascades, rim the region. These dramatic natural features are products of dynamic forces-landslides, earthquakes, tsunamis, glaciers, volca
Authors
Rex Baum, Ed Harp, Lynn Highland
Natural Hazards - A National Threat
The USGS Role in Reducing Disaster Losses --
In the United States each year, natural hazards cause hundreds of deaths and cost billions of dollars in disaster aid, disruption of commerce, and destruction of homes and critical infrastructure. Although the number of lives lost to natural hazards each year generally has declined, the economic cost of major disaster response and recovery continues to
Authors
U.S. Geological Survey
Archive of digital chirp seismic reflection data collected during USGS cruise 05SCC01 offshore of Port Fourchon and Timbalier Bay, Louisiana, August 2005
In August of 2005, the U.S. Geological Survey conducted geophysical surveys offshore of Port Fourchon and Timbalier Bay, Louisiana, and in nearby waterbodies. This report serves as an archive of unprocessed digital chirp seismic reflection data, trackline maps, navigation files, GIS information, Field Activity Collection System (FACS) logs, observer's logbook, and formal FGDC metadata. Filtered an
Authors
Arnell S. Harrison, Shawn V. Dadisman, James G. Flocks, Dana S. Wiese, Karynna Calderon
Surficial sediment character of the New York-New Jersey offshore continental shelf region: A GIS compilation
Broad continental shelf regions such as the New York Bight are the product of a complex geologic history and dynamic oceanographic processes, dominated by the Holocene marine transgression (>100 m sea-level rise) following the end of the last Pleistocene ice advance ~ 20,000 years ago. The area of the U.S. Exclusive Economic Zone (U.S. EEZ) territory, extending 200 nautical miles seaward from the
Authors
S. Jeffress Williams, Matthew A. Arsenault, Lawrence J. Poppe, Jane A. Reid, Jamey M. Reid, Chris J. Jenkins
Landsat ETM+ False-Color Image Mosaics of Afghanistan
In 2005, the U.S. Agency for International Development and the U.S. Trade and Development Agency contracted with the U.S. Geological Survey to perform assessments of the natural resources within Afghanistan. The assessments concentrate on the resources that are related to the economic development of that country. Therefore, assessments were initiated in oil and gas, coal, mineral resources, water
Authors
Philip A. Davis