Sensitivity of the Geophone

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IN experimenting with a magneto-striction seismometer originally designed for geophysical prospecting, some characteristics of the instrument were observed to be of interest. The geophone, when combined with a suitable amplifier, is capable of yielding a very high sensitivity, yet by itself it is so strong that it can be handled without a clamp just like a piece of metal, and it appears to be a most suitable instrument to study the effect of bomb explosions on buildings, steel structures and shelters. Actually it can be built into the steel structure and placed almost on the site of an explosion.

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WEN-PO, W. Sensitivity of the Geophone. Nature 143, 941 (1939) doi:10.1038/143941b0

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