R. O. Castle
1978, Earthquake Information Bulletin (USGS) (10) 88-92
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Publication Extents
Not all publications have extents, not all extents are completely accurateW.H. Prescott, J.C. Savage
1978, Earthquake Information Bulletin (USGS) (10) 131-135
Modern surveying instruments, such as geodimeters, are capable of measuring distances in the range of 1 to 30 kilometers with remarkable precision. Indeed, the present limitation upon the precision of measurement is not the resolution of the instruments themselves but rather the uncertainty introduced by variations in the velocity of...
R.N. Hunter, J.S. Derr
1978, Earthquake Information Bulletin (USGS) (10) 93-96
Can your friend's relative really predict earthquakes? Or how about that fellow in the mountains who has always liked geology, does he have the answer to the "when" of earthquakes? And if these people do actually predict an earthquake, is it a lucky guess or are they tuned in to...
Shen Ling-huang
1978, Earthquake Information Bulletin (USGS) (10) 231-233
W. Sullivan
1978, Earthquake Information Bulletin (USGS) (10) 160-161
To minimize damage and loss of life when, as is believed inevitable, a major earthquake strikes the United States, plans have been prepared for the creation of new Federal agencies, widespread reinforcement of structures and extensive research on earthquake prediction, control, and hazard reduction. ...
C. Y. King
1978, Earthquake Information Bulletin (USGS) (10) 136-138
Radon is a radioactive gas with a half-life of 3.8 days. (Half-life is the time required for the substance to lose half of its radioactivity by decay.) It is itself produced by the decay of uranium. Radon is constantly emanated from the Earth into the atmosphere. Many cases are known...
D.L. Lamar, P.M. Merifield
1978, Earthquake Information Bulletin (USGS) (10) 144-147
Abnormal behavior of water levels in wells has been observed prior to a number of earthquakes. For instance, water-level minima have been noted in the Cienega Winery well before earthquakes on the San Andreas fault. Abnormal water-level fluctuations were used in conjunctions with other precursors to predict the February 4,...
M. Johnston
1978, Earthquake Information Bulletin (USGS) (10) 187-191
Changes in the state of stress in the Earth's crust produces corresponding changes in the state of strain and may result, as a consequence, in damaging earthquakes. Monitoring ground strain can, therefore, help us in understanding how stress changes occur and when they are likely to lead to this kind...
M. Johnston
1978, Earthquake Information Bulletin (USGS) (10) 82-87
Measurements of the actual stress within the Earth and its changes with time are very difficult. It is much easier to monitor the direct effects of this stress, such as ground strain, or the indirect effects, such as changes in resistivity, strain, changes in seismic velocity or changes in magnetic...
A.G. Lindh
1978, Earthquake Information Bulletin (USGS) (10) 162-164
In recent years, we have made significant progress in being able to recognize the long-range pattern of events that precede large earthquakes. For example, in a recent issue of the Earthquake Information Bulletin, we saw how the pioneering work of S.A. Fedotov of the U.S.S.R in the Kamchatka-Kurile Islands region has...
D.W. Simpson, S. K. Negmattulev
1978, Earthquake Information Bulletin (USGS) (10) 208-213
M. Johnston
1978, Earthquake Information Bulletin (USGS) (10) 182-186
Our knowledge is still very limited as to the way in which the Earth's surface deforms around active faults and why it does so. By far the easiest method of providing clues to the mechanisms involved is to record the associated pattern of tilt of the Earth's surface. tilt measurements give...
W. J. Person
1978, Earthquake Information Bulletin (USGS) (11) 110-112
Seismically speaking, the last 2 months were the most active of the year. There were six major earthuakes having magnitudes (M) ranging from 7.0 to 7.9 throughout the world: the Solomon Islands, Mexico (the largest of the year, M=7.9), the Kuril Islands, Taiwan, the Philippine Islands, and western Iran. THe...
P. Reasenberg
1978, Earthquake Information Bulletin (USGS) (10) 42-50
Chandler S. Robbins
1978, North American Bird Bander (3) 69-69
Back-yard banding above the Patuxent River gorge was limited to early mornings and evenings on 28 days from 20 August through 12 October, and four full days within the same period.Although the number of birds captured per 100 net-hours was well above average in each of the three months, the...
Frederic H. Wilson, D. B. Hawkins
1978, Environmental Geology (2) 195-202
Arsenic concentrations of less than 5 ppb to as large as 1,260 ppb in stream waters and from 5 ppm to 4,000 ppm in stream sediments were found in the Pedro Dome-Cleary Summit area, Alaska. Waters from three of 20 wells sampled had arsenic concentrations exceeding the U.S. Public Health...
R. H. Turner
1978, Earthquake Information Bulletin (USGS) (10) 40-41
C. A. von Hake
1978, Earthquake Information Bulletin (USGS) (10) 62-64
C. A. von Hake
1978, Earthquake Information Bulletin (USGS) (10) 150-154
Forty-five earthquakes of moderate intensity (V or greater) on the Modified Mercalli Intensity Scale (MM) and extent have originated in Wyoming from 1894 to 1976. Many shocks have occurred in Yellowstone National Park, including an intensity VII event in June 1975. the 1959 Hebgen Lake, Mont., earthquake, centered just west...
John D. McIntyre, Donald F. Amend
1978, Transactions of the American Fisheries Society (107) 305-308
A hierarchical breeding design was used to demonstrate the heritability of tolerance for infectious hematopoietic necrosis (IHN) in sockeye salmon. Oncorhynchus nerka. Heritability was about 30%, indicating that artificial selection may increase the number of fish that can tolerate the disease....
Gary A. Wedemeyer, Nancy C. Nelson, Cathy A. Smith
1978, Journal of the Fisheries Research Board of Canada (35) 875-879
Ozone and chlorine inactivation curves were determined in three water types at 10 °C for the fish pathogenic viruses infectious hematopoietic necrosis (IHNV) and infectious pancreatic necrosis (IPNV). In phosphate-buffered, distilled water (PBDW) an ozone dose of 0.01 mg/L for 30 or 60 s inactivated IHNV or IPNV, respectively, suspended at a...
Gary A. Wedemeyer, W. T. Yasutake
1978, Journal of the Fisheries Research Board of Canada (35) 822-827
The efficacy of mineral salts, pH, and tetramethylthianine (methylene blue) treatment in reducing the acute toxicity of nitrite to fingerling steelhead trout (Salmo gairdneri) was determined using a static bioassay system at 10 °C. The acute toxicity (96-h LC50) was reduced by a factor of about 24 for 5-g steelhead...
C. A. von Hake
1978, Earthquake Information Bulletin (USGS) (10) 236-237
No abstract available....
R. E. Wallace
1978, Earthquake Information Bulletin (USGS) (10) 76-81
The relationship between magnitude and abundance of earthquakes, called a recurrence curve, has been derived for many regions of the world from seismographic records. AS an example, Clarence Allen and his associates at the California Institute of Technology have obtained recurrence rates for the southern California region by incorporating data...
C. A. von Hake
1978, Earthquake Information Bulletin (USGS) (10) 100-103
Only one earthquake of intensity V on the Modified Mercalli Intensity Scale (MM) or greater has occurred within Wisconsin during historic times. Some shocks originating in Illinois, Michigan, Missouri, Ohio, and Canada have been felt. ...