Accession Number:

AD0843347

Title:

1968 Aleutian Islands Experiment Ocean-Bottom Seismographic Experiments

Descriptive Note:

Final rept.

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV

Personal Author(s):

• McDermott, Joseph G.
• Kimler, Benjamin F.
• BeAbout, Edgar G.
• Harley, Terence W.

Report Date:

1968-08-23

Pagination or Media Count:

49.0

Abstract:

The 1968 Aleutian Islands Experiments objective was to obtain and analyze data for the determination of thicknesses and seismic velocities of crustal structures in the Amchitka Island vicinity. The following experiment preparations were accomplished modifications and routine maintenance of OBS and auxiliary equipment were completed a completely detailed technical plan was submitted the ship was selected condition of field equipment located outside the TI Dallas facilities was evaluated operating and documenting procedure for field navigation was established and a complete hydroacoustic program was outlined. A central timing system was designed to provide an accurate time signal for coordinating all shipboard functions on a real-time basis. An automatic direction-finder which provides a unit location system with a visual display was designed to facilitate recovery operations. Official notification of the present contracts partial termination for the convenience of the Government was received on 9 May 1968. An immediate response was made to the contract change notice, resulting in modified program objectives and schedules in compliance with the AFTAC directive.

Descriptors:

• *SEISMOLOGY
• ALEUTIAN ISLANDS
• AUTOMATION
• BUOYS
• DIRECTION FINDING
• DISPLAY SYSTEMS
• EXPLOSIONS
• INSTRUMENTATION
• NAVIGATION
• OCEAN BOTTOM
• PHASED ARRAYS
• SEISMIC WAVES
• SOUND TRANSMISSION
• STRUCTURAL GEOLOGY
• THICKNESS
• UNDERWATER EQUIPMENT
• UNDERWATER SOUND
• VELOCITY

Subject Categories:

• Geology, Geochemistry and Mineralogy
• Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE