Abstract
Preliminary tests made to determine the response characteristics of‐an electronic earthquake recorder are described. Tests were conducted with a Wenner and a special seismometer as well as with a Neumann‐LaBarre vibration meter. Simultaneous recordings on both smoked paper and photographic paper, which were made on the same drum and from the same seismometer mirror, are shown. The electronic recorder appears to respond satisfactorily to earthquake waves of from one sec to 30 sec or longer in period.
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