seismicity

Seismicity is quantitatively computed. Generally, the region under study is divided in equally sized areas defined by latitude and longitude, and the Earth's interior is divided into various depth intervals on account of Earth's layering: Up to {{Convert|50|km|mi|abbr=on}} depth, {{Convert|50–300|km|mi|abbr=on}}, and > {{Convert|300|km|mi|abbr=on}}.{{cite book|last1=Schneider|first1=Götz|title=Erdbeben. Eine Einführung für Geowissenschaftler und Bauingenieure|date=2004|publisher=Springer|location=Hamburg, Germany|language=German}}{{page needed|date=April 2021}}

The usual formula to calculate seismicity is:

$$S\; =\; \backslash frac\{\backslash sum\_\{i\}\; \{E\_\{s0\}\}\_i\}\{\; \backslash delta\; \backslash phi\_0\; \backslash ,\; \backslash delta\; \backslash lambda\_0\; \backslash ,\; \backslash delta\; h\_0\; \backslash ,\; \backslash delta\; t\_0\; \}$$

where

: $\{E\_\{s0\}\}\_i$: is the energy of a single seismic event (i.e., earthquake);

: $\{\backslash delta\; \backslash phi\}\_0$: interval of latitude;

: $\{\backslash delta\; \backslash lambda\}\_0$: interval of longitude

: $\{\backslash delta\; h\}\_0$: interval of the hypocenter;

: $\{\backslash delta\; t\}\_0$: interval of the time of the seismic event.

: The result is seismicity as energy per cubic unit.

• Moment magnitude scale
• Plate tectonics
• Seismology
• Wadati–Benioff zone

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Category:Seismology measurement

Category:1940s neologisms

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