F-2-86-BS

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Seismic Metadata v.1

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Data Type

Singlechannel Seismic

Data Acquisition System

Airgun and Streamer

Contributor

Pacific Coastal and Marine Science Center

Dates

Started on July 6, 1986, and ended on Aug. 2, 1986.

Number of Tracklines

44

Distance Shot

9,398 km

Description

To survey an area which extends seaward of the Bering Sea shelf between the Aleutian Island ridge and the US-USSR 1867 convention line.

Purpose

In 1983, President Ronald Reagan signed a Proclamation establishing the Exclusive Economic Zone (EEZ) of the United States extending its territory 200 nautical miles from the coasts of the United States, Puerto Rico, the Northern Mariana Islands, and other U.S. territories and possessions. The charter of the U.S. Geological Survey (USGS) places the primary responsibility for mapping the territories of the United States within the USGS. Upon declaration of the EEZ, the territory of the United States was enlarged by more than 13 million square kilometers, all of which are under water. The USGS EEZ-SCAN program to systematically map the EEZ began in 1984 and continued through 1991. This digital publication contains all the GLORIA sidescan imagery of the deep-water (greater than 200 meters) portion of the EEZ mapped during those 8 years of data collection. For each EEZ area, we describe the data collection surveys and provide downloads of the GLORIA data and metadata.

Notes

The Bering Sea was the first area to be mapped as survey of the Alaskan EEZ began in 1986. The GLORIA image of the deep water of the U.S. EEZ Bering Sea area covers approximately 830,000 sq km of seafloor, and does not include the vast, shallow continental shelf. The area surveyed covered the Aleutian Basin and Bowers Basin deeper than 200 m east of the U.S.-U.S.S.R Convention Line of 1876.

The GLORIA data for the Bering Sea were acquired during four cruises over a two year period. The first three cruises completed in 1986 acquired approximately 75 percent of the data used to create the mosaic. The first cruise (F-2-86-BS) conducted from July 6 - August 2, 1986, surveyed an area which extends seaward of the Bering Sea shelf between the Aleutian Island ridge and the US-USSR 1867 convention line (Carlson, 1987). The second cruise (F-3-86-BS) from August 6 - September 1, 1986, completed the survey of the central Aleutian Basin and Beringian margin (Gardner and others, 1986). The final cruise of 1986, (F-4-86-BS), was conducted from September 3 - 30 surveyed the southern Bering Sea between the Bering continental shelf, south of Pribilof Canyon, and Bowers Ridge (Cooper and others, 1986).

The fourth and final cruise, (F-1-87-BS), conducted from June 28 - July 28, 1987 completed the survey of the Bering Sea which included Bowers Basin, Bowers Ridge, and the southwestern part of the Aleutian Basin. A small area south of Attu, Agattu, Shemya, and Buldir Islands (western Aleutian Islands) also was surveyed (Cooper and others, 1987).

Geographic Features

Bering Sea

Processed Methods

Seismic Reflection

Processed Data Classes

Stack

Data File Formats

SEG-Y, Text

Embedded Navigation

No

Data Class

Processed

Seismic Data Provenances

Digitally Acquired Digital SEG

Data Media

Online

Datum

North American Datum 1927 (NAD27)