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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 181 records · Page 10Linked to original sources
USGS1974

Laboratory experiments duplicate conditions in the Earth’s crust

An experimental device that simulates conditions in the Earth's crust at depths of up to 30 kilometers has been constructed by geophysicists working at the U.S Geological Survey laboratories in Menlo Park, California. A high pressure "bomb" is being used to experimentally measure the velocity of seismic waves in different types of rock at various confining pressures and temperatures. The principal purpose of these measurements is to determine the elastic and non-elastic properties of rocks and minerals under conditions of high-pressure such as exist deep in the Earth's crust.

Earthquake Information Bulletin (USGS)↗
USGS1985

Earthquakes, September-October 1984

There were no major earthquakes (7.0-7.9) during this reporting period but earthquake related deaths wre reported from Japan Turkey. Algeria the USSR, and Yugoslavia had damaging earthquakes. In the United States, Wyoming experienced a couple of moderate earthquakes, and off the coast of northern California, a strong earthquake shook much of the northern coast of California and parts of the Oregon coast.

Earthquake Information Bulletin (USGS)↗
USGS1985

Earthquakes November-December 1984

Major earthquakes (7.0-7.9) were located in Sumatera, the Philippine Vanuatu Islands, Kamchatka, and the Mid-Atlantic Ocean during this reporting period. Earthquake-related deaths were reported from a magnitude 5.8 quake in India. There was no significant damage from earthquakes in the United States.

Earthquake Information Bulletin (USGS)↗
USGS1985

Earthquakes March-April 1985

There were two major earthquakes (7.0-7.9) during this reporting period-both were in Chile and both caused fatalities. Earthquake-related deaths were also reported from the Philippine Islands, Bolivia, and China. In the United States a strong earthquake occurred in Alaska on March 9 and a magntidue 6.3 earthquake occurred off the coast of Oregon on March 13.

Earthquake Information Bulletin (USGS)↗
USGS1985

Earthquakes, July-August 1984

There were no major earthquakes (7.0-7.9) and no earthquake related deaths reported during this period but injuries and damage were experienced in Japan from earthquakes. There were no earthquake casualties reported in the United States but some minor damage was reported.

Earthquake Information Bulletin (USGS)↗
USGS1985

Earthquakes, January-February 1985

There were no major earthquakes (7.0-7.9) during the first two months of the year. Argentina reported the first deaths from an earthquake on January 26 and Iran reported on earthquake-related death on February 2. In the United States, there were no casualties or damage reported from earthquakes.

Earthquake Information Bulletin (USGS)↗
USGS1984

Earthquakes; September-October 1983

Two major earthquakes (magntidue 7.0-7.9) occurred during the month of October. The first was on October 4 in northern Chile. the second occurred in the United States in the State of Idaho on October 28. This was the first major earthquake in the conterminous United States since a magnitude 7.2 event occurred near the coast of northern California on November 8, 1980, and was the first earthquake to cause fatalities in the conterminous United States since February 9, 1971. The most deadly earthquake occurred in eastern Turkey on October 30.

Earthquake Information Bulletin (USGS)↗
USGS1984

Earthquakes, July-August 1983

There were three major earthquakes (7.0-7.9) during this reporting period, but all were in sparsely populated areas. The first occurred on July 11 in the South Shetland Islands, the second in the Aegean Sea on August 6, and the third on August 17 in Kamchatka. Earthquake-related deaths from other quakes were reported from Costa Rica, Iran, Japan, Turkey, the Philippine Islands, and Sicily. In the United States, aftershocks continued in the Coalinga, California, area; the largest was a magnitude (M) 6.0 on July 21. A magntidue 6.3 earthquake occurred in southern Alaska on July 12.

Earthquake Information Bulletin (USGS)↗
USGS1983

Earthquakes, March-April 1983

March and April were quite active with widespread deaths and damage from earthquakes. There were two major (magnitude 7.0-7.9) earthquakes, one in the New Ireland region and the other in Costa Rica. The most devastating earthquake occurred in Colombia. deaths from earthquakes also occurred in Iran, Costa Rica, and Peru. The United States experienced a number of earthquakes during this reporting period, but only slight damage was reported from some of the earthquakes.

Earthquake Information Bulletin (USGS)↗
USGS1981

Earthquakes, January-February 1981

The first 2 months of the year were somewhat active, seismically speaking. Two major earthquakes (magnitude 7.0-7.9) occurred during the month of January, a magnitude 7.1 Japan on the 8th and a magntidue 7.1 in the Aleutian Islands on the 30th. Fatalities and damage were experienced in Irian Jaya (formerly West New Guinea) on January 19, in China on January 23, in Italy on February 14, and in Greece on February 24. In the United States, there were a number of earthquakes, the largest, a magnitude 7.1, in the Aleutian Islands, but none of the quakes caused injuries or serious damage.

Earthquake Information Bulletin (USGS)↗
USGS1980

Earthquakes, September-October, 1979

The months of September and October were quite active, seismically speaking, compared to the previous 2 months. One great earthquake, a magnitude (M) 8.1, was centered in the West Irian region on September 12. Two major (M=7.0-7.9) earthquakes occurred, one on October 12, a M=7.3 off the west coast of South Island, New Zealand, and one on October 23, a M=7.2 in the Solomon Islands. Damaging earthquakes hit central Italy and Guatemala. In the United States, California experienced the strongest earthquake in that State since 1971. The quake, a M=6.8, occurred on October 15, in Baja California, Mexico, near the California border and caused injuries and damage.

Earthquake Information Bulletin (USGS)↗