Abstract

The trend of geophysical activity during 1949 was away from the United States; whereas, seismograph activity in the United States was down 1.43 per cent from the preceding year, that elsewhere was up 28.85 per cent. Gravity operations in the United States in 1949 were down 31.29 per cent as compared to 1948. Elsewhere the decrease was 14.17 per cent. This report is designed to give a composite picture of the geophysical operations of last year with regard to their magnitude and geographic distribution.

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