Abstract
The earthquake of April 1, 1946, was one of the very few Aleutian earthquakes whose instrumental epicenter may be checked against surface effects. Its magnitude was just under the lower limit of a major earthquake. Early seismographic data came from the United States, Alaska, and Hawaii. Some uncertainties were involved in the interpretations, which could not be appraised until the records were received, the difficulty being largely the result of heavy microseismic activity.Examination and correlation of available data were completed about the middle of May, 1946 and resulted in a reasonably dependable position near 53°.5 N, 163°W, with origin time of 12h29m GCT. The depth of focus was near normal. The epicenter is based on the normal depth tables of Gutenberg and Richter.

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