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OCEANOGRAPHY DEPARTMENT OREGON STATE UNIVERSITY, CORVALLIS, OREGON 97331
Abstract
Seven temporary and three permanent seismograph stations recorded seismic waves to a distance of about 270 km from a 110,000 pound quarry blast detonated near Depoe Bay, Oregon. The recording stations were in a north-south line along the northern coast range of Western Oregon and Washington. The travel-time data indicate an apparent shallow crustal thickness (about 16 km) for this region. The time versus distance data were not continuous beyond 130 km from the source which may have resulted from any combination of the following causes: (1) insufficient source energy; (2) lateral geological variations; and/or (3) a subcrustal negative velocity gradient.
Footnotes
Presented at the 1966 national meeting of the Seismological Society of America by Lynn Trembly.
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