Abstract
The Section of Seismology of the Geophysical Union appears satisfied that the number of seismic stations in the United States is adequate. It also feels that, though the installations at these stations are not, in every instance, of a class “A” character, nevertheless all could broadcast data of a valuable nature. In the catalogue of Dr. Wood, Bulletin No. 15 of the National Research Council, i. e., Vol. II, Part 7, twenty‐nine observatories are listed, and of these scarcely thirty per cent make any pretense at the issuance of regular reports. The value of these grams, assuming that these stations have their instruments in operation, can be enhanced in the marking of them. Possibly the directors of these plants need to be impressed with the truism that this is a “worth while” issue. Now to the stations rendering reports. One of the first problems of the seismologist is to establish the geography of earth tremors.
Published Version
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