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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

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At least 325 records · Page 18Linked to original sources
USGS1985

Tsunamis – Scourge of the Pacific

Although tsunamis occur most often in the Pacific Ocean, they can be generated by major earthquakes in other areas. The most frequent cause of tsunamis…is crustal movement along a fault: a large mass of rock drops or rises and displaces the column of water above it. This column of water – a tsunami – travels outward from the source at the fantastic speed of 500 mph or more. When an earthquake occurs in the Pacific Ocean Basin, authorities must quickly decide on a course of action.

Earthquake Information Bulletin (USGS)↗
USGS1985

Earthquake potential of the Wasatch Fault in Utah

The majority of Utah’s population lives along the Wasatch fault, an active intraplate normal fault that extends for approximately 230 miles along the western front of the Wasatch Range. Investigations of earthquake recurrence on the Wasatch fault have revealed that segments of the fault have been the source of repeated large earthquakes, probably of magnitude 6-3/4 to 7-1/2 .

Utah↗
USGS1979

Origins and early years of the U.S. Geological Survey

The U.S. Geological Survey was established on March 3, 1879, in the closing hours of the final session of the 45 th Congress. The bill appropriating the money for sundry civil expenses of the Government during fiscal year 1880 was signed by President Rutherford B. Hayes. Included in the bill was the provision for a new agency under the Department of the Interior; it was charged with responsibility for “classification of the public lands, and examination of the geological structure, mineral resources, and products of the national domain.”

Earthquake Information Bulletin (USGS)↗
USGS1979

The beginnings of seismology in North America

The study of earthquakes advanced somewhat more slowly in North America than it did in Europe and Japan. J.D. Whitney, professor of geology at Harvard University and former State Geologist of California, studied the Owens Valley, Calif., earthquake of 1872 and reported on it that same year.

Earthquake Information Bulletin (USGS)↗
USGS1981

Earthquake-triggered landslides form lakes in New Zealand

Eleven small lakes were formed by landslides caused by the 1929 Buller earthquake in New Zealand; four others were formed by other historic earthquakes in this country. At least nine other New Zealand lakes are dammed by landslides and were probably formed by prehistoric earthquakes. Earthquake-dammed lakes could provide an estimate of paleoseimicity for the past few hundred or thousand years.

Earthquake Information Bulletin (USGS)↗