Accession Number : ADA277009

Title :   Long Transect Seafloor Seismic Array: A Component of SAMSON (Sources of Ambient Micro Seismic Oceanic Noise).

Descriptive Note : Final rept. 1 Nov 89-30 Sep 93,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s) : Webb, Spahr C.

Report Date : JAN 1994

Pagination or Media Count : 6

Abstract : During the SAMSON experiment, an array of at least twelve seafloor instruments was deployed to measure ambient seismo-acoustic noise. SAMSON is a large, coordinated experiment featuring several land and seafloor seismic arrays directed at studying the generation and propagation of very low frequency (1 mHz to 1 Hz) ambient noise. Surface waves were measured at the coast by the FRF array (established by NCEL), by a pressure array near the coast and in deep water with wave buoys which are part of the ONR funded SWADE program. The seismic array extended from shallow into deep water from the North Carolina Coast. Data from the array was incoherently processed and principally used to study the evolution of the seafloor noise field as a function of distance from the coast and with depth. The array also serves to tie together measurements made by the three coherent arrays: the first on land, the second in the shallow water very near the coast and the third in deep water beyond the shelf. Some instruments of the incoherent array were elements of the two marine coherent arrays Seismic arrays, SAMSON, Ambient noise, Seismic-acoustic data.

Descriptors :   *ACOUSTIC DATA, *SEISMIC ARRAYS, *OCEAN BOTTOM, AMBIENT NOISE, BUOYS, DEEP WATER, DEPTH, LOW FREQUENCY, MEASUREMENT, NORTH CAROLINA, PRESSURE, SHALLOW WATER, SURFACE WAVES, VERY LOW FREQUENCY, OCEAN WAVES, ATLANTIC OCEAN.

Subject Categories : Seismology
      Acoustics
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE