Variability in earthquake stress drop and apparent stress
We apply empirical Green's function coda?based analysis to four earthquake sequences in Japan that span a magnitude range of 1.8 to 6.9, to measure radiated energy, corner frequency and stress drop. We find no systematic dependence of apparent stress or stress drop on seismic moment for these s...
- Autores:
- Tipo de recurso:
- Fecha de publicación:
- 2011
- Institución:
- Universidad del Rosario
- Repositorio:
- Repositorio EdocUR - U. Rosario
- Idioma:
- eng
- OAI Identifier:
- oai:repository.urosario.edu.co:10336/27190
- Acceso en línea:
- https://doi.org/10.1029/2011GL046698
https://repository.urosario.edu.co/handle/10336/27190
- Palabra clave:
- Stress drop
Apparent stress scaling
Radiated energy
Energetic earthquakes
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- License
- Abierto (Texto Completo)
| Summary: | We apply empirical Green's function coda?based analysis to four earthquake sequences in Japan that span a magnitude range of 1.8 to 6.9, to measure radiated energy, corner frequency and stress drop. We find no systematic dependence of apparent stress or stress drop on seismic moment for these sequences, and find they both are log?normally distributed; however, we identify several anomalous events ? both energetic and enervated ? that show sharply different spectral signatures from the rest of the population. These events indicate that much of the variation in apparent stress and stress drop is statistically significant, which may have important implications for seismic hazard analysis. |
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