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Will a continuous GPS array for L.A. help earthquake hazard assessment? |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 43,
1996,
Page 417-417
William H. Prescott,
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PDF (91KB)
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摘要:
The striking landscapes and hospitable climate of Southern California are home to more than 20 million people and vital elements of the nation's economy. Unfortunately, the region is also laced with many active faults that can produce strong earthquakes. Scientists from several institutions are pursuing a new approach to studying earthquake hazards in a high‐risk metropolitan area.The Southern California Integrated GPS Network (SCIGN) is currently an array of about 40 Global Positioning System (GPS) stations distributed throughout the greater Los Angeles metropolitan region. There have been informal discussions about expanding the array to 250 stations, and formal proposals have been submitted to begin this expansion. To achieve high precision, the sites will be carefully monumented, and all the GPS receivers will operate continuously. The goals of the array are to provide an accurate and detailed velocity field from which to identify the deformation from known faults, test current models of the geologic structure, and make better estimates of the seismic potential in the populous parts of southern Californi
ISSN:0002-8606
DOI:10.1029/96EO00283
年代:1996
数据来源: WILEY
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Wired |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 43,
1996,
Page 418-418
Michael Carlowicz,
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PDF (100KB)
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摘要:
Every American grade school and library ought to have free access to the Internet, and universities and institutions ought to have better access, according to the Clinton Administration.In an October 10 speech in Knoxville, Tennessee, President Clinton proposed that all of the nation's 100,000 public schools and 9,000 libraries receive a two‐tiered E‐rate (education rate) for access to Internet services. All schools and libraries should receive basic connections for free, as well as deep discounts on video conferencing and highspeed connections (with prices influenced by how much the school can afford to pay). The basic connections (and part of the cost of the more sophisticated connections) would be paid from a special federal fund that currently provides below‐cost phone service to households in poor and rural areas. That fund is currently drawn from fees assessed on local and long‐distance telephone providers; the Clinton Administration would have cable operators and cellular service providers contribute as well. Companies that provide Internet services would be paid at the best available commerci
ISSN:0002-8606
DOI:10.1029/96EO00286
年代:1996
数据来源: WILEY
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Yes: The L.A. array will radically improve seismic risk assessment |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 43,
1996,
Page 419-427
William H. Prescott,
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PDF (390KB)
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摘要:
SCIGN will provide a key component in improving our understanding of the scientific and earthquake hazard issues. Because of the advantages, dense permanent GPS stations are being used in many earthquake research studies. The time is right for a project like SCIGN in the greater Los Angeles metropolitan region, scientifically, technically, economically, and socially. SCIGN will contribute key data to the current geologic debate between “thick‐skinned” and “thin‐skinned” models. With a global network of tracking stations and modern data processing, GPS techniques have matured adequately to handle the data volume and provide the precision required. Considering potential losses from earthquakes in the area, SCIGN is inexpensive relative to the scientific payoff. And the earthquake hazard in the region demands that we do everything we can to reduc
ISSN:0002-8606
DOI:10.1029/96EO00287
年代:1996
数据来源: WILEY
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Kolb accepts Editorship of GRL |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 43,
1996,
Page 420-420
Anonymous,
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PDF (1328KB)
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摘要:
Charles E. Kolb began his 3‐year tenure as atmospheric sciences editor ofGeophysical Research Lettersin March. Kolb has served as president and chief executive officer of Aerodyne Research Inc. (ARI) since 1985, and he was recently selected to receive the American Chemical Society's 1997 Award for Creative Advances in Environmental Science and Technology.Kolb's research focus at ARI includes atmospheric and environmental chemistry, combustion chemistry, materials chemistry, and the chemical physics of rocket and aircraft exhaust plumes. During his career at ARI, Kolb initiated programs to identify and measure sources and sinks for trace atmospheric species involved in global and regional pollution problems, as well as programs that apply advanced spectroscopic techniques to improve the detection of soil and groundwater contaminants through the use of cone penetrometer technolog
ISSN:0002-8606
DOI:10.1029/96EO00289
年代:1996
数据来源: WILEY
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