Abstract
THE Earth normal mode spectrum, between 8 and 39 cycles per hour (c.p.h.), has been obtained with a 20 dB signal-to-noise ratio for a relatively small earthquake (Ms = 6.5), using a low noise broad-band vertical accelerometer of new design. The earthquake occurred in the New Hebrides (18.9° S, 169.3° E) on October 13, 1969, 06 : 56 G.M.T. at a depth of 246 km.
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References
Block, B., and Moore, R. D., Trans. Amer. Geophys. Union, 50, No. 4 (1969).
Block, B., and Moore, R. D., J. Geophys. Res. (in the press).
Block, B., and Moore, R. D., J. Geophys. Res., 71, 4361 (1966).
Farrell, W. E., and Moore, R. D., J. Geophys. Res. (in the press).
Backus, G., and Gilbert, F., Phil. Trans. Roy. Soc., A (in the press).
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BLOCK, B., DRATLER, J. & MOORE, R. Earth Normal Modes from a 6.5 Magnitude Earthquake. Nature 226, 343–344 (1970). https://doi.org/10.1038/226343a0
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DOI: https://doi.org/10.1038/226343a0
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