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To report different wave motions on the seis- mogram, an international
terminology based on Latin was adopted by most seismograph observatories. As
shown in Fig. 2, the first preliminary tremor was denoted by the letter P for undue
Nakano found that a source consisting of a single couple [i.e., two parallel forces
oppositely directed and separated by a small distance, just like the arrows in Fig.
4a] would produce a P-wave radiation pattern as shown in Fig. 4b. The signs of ...
The spectrum of a sine wave of infinite duration has only a single frequency
component, as shown in Fig. 5. However, this property is not true for the spectrum
of a sine wave of finite duration, as shown in Fig. 6. The spectrum of a finite
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Seismology Observational 17 Stochastic Description
Seismology Theoretical 47 Solar Chimneys
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