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Título del libro: 85th Eage Annual Conference And Exhibition Workshop Programme 2024
Título del capítulo: Complex slip dynamics of a fault zone: decoding and interpreting seismic observation using numerical model

Autores UNAM:
CARLOS DAVID VILLAFUERTE URBINA;
Autores externos:

Idioma:

Año de publicación:
2024
Palabras clave:

Earthquake effects; Geodesy; Damage zones; Earthquake catalogs; Energy; Fault zone; Geodetic data; Mechanical interactions; Seismic activity; Seismic observation; Slip dynamics; Slip rates; Seismic response


Resumen:

In this study, we explain how mechanical interaction among rate-weakening faults and the damage zone reproduces seismic activity similar to natural observed earthquake catalogues. This similarity is presented in terms of the frequency of magnitudes, the increase in seismicity rate prior to the total breakdown of the main fault, and its decrease thereafter. Exploring the slip rates reveals a broad range of modes of rupture, from slow slip, which hardly radiates energy and can only be observed through geodetic data, to very-low-frequency (VLFE) and low-frequency (LFE) earthquakes that have seismic signatures. We examine the signals produced by these fault movements to observe how a given fault volume radiates waves during a slow-slip event. Additionally, we delve into the fracture energy of the earthquakes, viewing it as a ubiquitous mechanical quantity that explains the coexistence of slow and fast events on the same fault, and how the energy budget determines the rates at which faults break. © 85th EAGE Annual Conference and Exhibition Workshop Programme 2024.


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