Computer systems for automatic earthquake detection
S.W. Stewart
1974, Earthquake Information Bulletin (USGS) (6) 17-21
U.S Geological Survey seismologists in Menlo park, California, are utilizing the speed, reliability, and efficiency of minicomputers to monitor seismograph stations and to automatically detect earthquakes. An earthquake detection computer system, believed to be the only one of its kind in operation, automatically reports about 90 percent of all local...
Turkey’s North Anatolian Fault; a comparison with the San Andreas Fault
J. W. Dewey
1974, Earthquake Information Bulletin (USGS) (6) 12-16
Scientists probe Earth’s secrets at the Hawaiian Volcano Observatory
J. D. Unger
1974, Earthquake Information Bulletin (USGS) (6) 3-11
The Hawaiian Volcano Observatory (HVO) sits on the edge of Kilauea Caldera at the summit of Kilauea Volcao, one of the five volcanoes on the island of Hawaii, the largest island in the Hawaiian Islands chain. Of the five, only Kilauea and Mauna Loa have been active in the past...
Earthquake history of Nevada
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 26-29
Since 1852, more than 30 shocks of intensity VI or greater (Modified Mercalli scale) have occurred in western Nevada. At least three of these were classified as intensity X. In addition, seven earthquakes (intensity VI or greater) were centered in the eastern part of the State. Almost 2,000 other shocks...
Earthquake history of Nebraska
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 32-33
Nebraska is in a region of moderate seismicity occasionally punctuated by rather strong earthquakes. Most of the State is seismic risk zone 1, with a small part in the southeast corner in risk zone 2. the first significant earthquake felt in Nebraska occurred in 1867, the year that statehood was...
Earthquake history of Montana
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 30-35
Montana is one of the most seismically active States in the Union. Since 1925, the State has experienced five shocks that reached intensity VIII or greater (Modified Mercalli Scale). During the same interval hundreds of less severe tremors were felt within the State. Montana's earthquake activity is concentrated mostly in...
Earthquake history of Missouri
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 24-26
Most of Missouri's earthquake activity has been concentrated in the southeast corner of the State, which lies within the New Madrid seismic zone. As recently as Merch 29, 1972, the region was jolted by a magnitude 3.7 shock that was felt over a 168,000 square kilometre area including parts of...
Earthquake history of Mississippi
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 20-21
Since its admission into the Union in 1817, Mississippi has had only four earthquakes of intensity V or greater within its borders. Although the number of earthquakes known to have been centered within Mississippi's boundaries is small, the State has been affected by numerous shocks located in neighboring States. In...
Earthquake history of Minnesota
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 28-29
French traders and missionaries were active in the region that is now Minnesota as early as the 1650's; however, settlement proceeded slowly and the area was not organized as a territory until 1849. Minnesota was admitted to the Union as the 32nd State on May 11, 1858. the earthquake history...
Comparative toxicity of two Iodophors to rainbow trout eggs
Donald F. Amend
1974, Transactions of the American Fisheries Society (103) 73-78
Toxicity of Wescodyne(R) and Betadine(R) to eyed eggs was not adversely affected by water hardness (as calcium and magnesium) or by exposure periods up to 60 min. Both iodophors were much more toxic below pH 6.0 than at pH 8.0. In general Wescodyne was slightly more toxic than Betadine. Significant egg loss...
Earthquakes, November-December 1973
W. J. Person
1974, Earthquake Information Bulletin (USGS) (6) 26-27
A number of significant earthquakes happened during the last 2 months of 1973. Two major earthquakes (magnitude 7.0-7.9) occurred in the New Hebrides Islands, bringing the final major earthquake total for the year to 11, somewhat below the annual average which is 18. One great earthquake (magntidue 8.0 and above)...
Earthquakes, January-February 1974
W. J. Person
1974, Earthquake Information Bulletin (USGS) (6) 18-19
During the first 2 months of 1974, earthquakes caused fatalities in Peru and Turkey. The largest earthquake during the period was a magnitude 7.2 shock in the New Hebrides Islands. A local tsunami was generated by a magnitude 7.0 earthquake in the Solomon Islands. The relative quiet that characterized world...
The Mississippi Valley earthquakes of 1811 and 1812
O.W. Nuttli
1974, Earthquake Information Bulletin (USGS) (6) 8-13
Shortly after 2 o'clock on the morning of December 16, 1811, the Mississippi River valley was convulsed by an earthquake so severe that it awakened people in cities as distant as Pittsburgh, Pennsylvania, and Norfolk, Virginia. This shock inaugurated what must have been the most frightening sequence of earthquakes ever...
Earthquake prediction; new studies yield promising results
R. Robinson
1974, Earthquake Information Bulletin (USGS) (6) 14-17
On Agust 3, 1973, a small earthquake (magnitude 2.5) occurred near Blue Mountain Lake in the Adirondack region of northern New York State. This seemingly unimportant event was of great significance, however, because it was predicted. Seismologsits at the Lamont-Doherty geologcal Observatory of Columbia University accurately foretold the time, place,...
Seismicity and earthquake hazards of the Wasatch Front, Utah
H. Spall
1974, Earthquake Information Bulletin (USGS) (6) 12-17
The impressive topographic break at the base of the Wasatch Range immediately east of Salt Lake City, Utah, marks the location where Mormon colonizer Brigham Young said in 1847. "This is the place" Actually, "the place" is termed the Wasatch Front because the Wasatch Range to the east, which rises...
The California geodimeter network; measuring movement along the San Andreas Fault
J.C. Savage
1974, Earthquake Information Bulletin (USGS) (6) 3-7
Following the great California earthquake of 1906 H. F. Reid, a contemporary seismologist, proposed the elastic rebound theory which in effect says that earthquake potential arises from the accumulation of elastic strain within the Earth's crust, just as the stretching of a rubberband creates the potential for violent rebound upon...
Searching for prehistoric earthquakes in lake sediments
J. Sims
1974, Earthquake Information Bulletin (USGS) (6) 3-9
How often do major earthquakes occur? Do they follow regular patterns of recurrence, and if so, what is the length of the recurrence interval? These questions are of obvious importance to populations located in regions where earthquakes are a commonplace occurrence. They are also relevant questions in regions that are...
A geologic and geophysical study of the Charleston, South Carolina, earthquake zone
B.B. Higgins, P. Popenoe
1974, Earthquake Information Bulletin (USGS) (6) 16-23
A maximum Modified Mercalli intensity of X was reported in Charleston. Damage to buildings was extensive, railroads were made impassable, and communications were disrupted. During the earthquake 27 people were killed, and 56 later died as a result of exposure and injuries sustained during the shaking. The earthquake was reported...
New cooperative seismograph networks established in southern California
D.P. Hill
1974, Earthquake Information Bulletin (USGS) (6) 8-11
Southern California has more active faults located close to large, urban population centers than any other region in the United States. Reduction of risk to life and property posed by potential earthquakes along these active faults is a primary motivation for a cooperative earthquake research program between the U.S Geological...
Availability of ground water in the lower Pawcatuck River basin, Rhode Island
Joseph B. Gonthier, Herbert E. Johnston, Glenn T. Malmberg
1974, Water Supply Paper 2033
The lower Pawcatuck River basin in southwestern Rhode Island is an area of about 169 square miles underlain by crystalline bedrock over which lies a relatively thin mantle of glacial till and stratified drift. Stratified drift, consisting dominantly of sand and gravel, occurs in irregularly shaped linear deposits that are...
An experimental trap net fishery, Lake Oahe, South Dakota, 1965
James A. Gabel
1974, Technical Paper 82
Large trap nets were evaluated as a commercial gear for capturing buffalo fish during July-September 1965. During the 72-day fishing period, 13,171 fish weighing 21,669 kg were taken. Bigmouth buffalo (Ictiobus cyprinellus) and smallmouth buffalo (Ictiobus bubalus) dominated the catch (78.2% by weight). Eight sport species accounted for 3.6% of...
Report on direct current soundings over a geothermal prospect in the Bruneau-Grand View area, Idaho
Dallas B. Jackson
1974, Open-File Report 74-240
No abstract available....
Progress report on flood magnitude and frequency of Vermont streams
Carl G. Johnson, Gary D. Tasker
1974, Open-File Report 74-130
A technique is presented for estimating the magnitude and frequency of floods on streams in Vermont with drainage areas between 0.27 and 1,040 square miles. Multiple-regression techniques are used to define the relation between flood peaks, collected at a network of gaging stations maintained by the U.S. Geological Survey, and...
Geology of the Buchanan Quadrangle, Liberia
Russell G. Tysdal
1974, Open-File Report 74-308
No abstract available....
Utilization of ERTS-1 for appraising changes in continental migratory bird habitat
E.A. Work, D.S. Gilmer, Albert T. Klett
1974, Report
No abstract available....
