Amplitudes of P, PP, and S and magnitude of shallow earthquakes*

1945/04/01 by B. Gutenberg · 7 citations
Earth and Planetary Sciences · Engineering · #High-pressure geophysics and materials #Earthquake Detection and Analysis #Geophysics and Sensor Technology #Amplitude #Magnitude (astronomy) #Seismology #Geology #Transverse plane #Mantle (geology) #Seismic wave #Geophysics #Physics #Optics #Structural engineering

paper · doi:10.1785/bssa0350020057

openalex publication_date 1945/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

Summary It is found that the absorption coefficient for longitudinal and transverse waves in the mantle of the earth as well as for longitudinal waves through the core is 0.00012 per km. In the average shallow earthquake about equal amounts of energy go into longitudinal and transverse waves. Equation (18), together with tables 2 and 4, permits the calculation of the magnitude of a shallow earthquake from the amplitudes of P, PP, or S.

Citations

• Seismicity of the Earth
• Amplitudes of surface waves and magnitudes of shallow earthquakes*

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• New Dimensions in Seismology
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• Moment magnitude scale [wikipedia]