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Global rupture parameters for deep and intermediate‐depth earthquakes
Author(s) -
Poli Piero,
Prieto Germán A.
Publication year - 2016
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.983
H-Index - 232
eISSN - 2169-9356
pISSN - 2169-9313
DOI - 10.1002/2016jb013521
Subject(s) - seismology , geology , volcano , slab , induced seismicity , intraplate earthquake , deep focus earthquake , stress (linguistics) , scaling , geophysics , subduction , tectonics , geometry , linguistics , philosophy , mathematics
We investigate the global rupture parameters for deep and intermediate‐depth earthquakes. From measurements of rupture duration and radiated seismic energy we estimate stress drop, apparent stress, and radiation efficiency and obtain a detailed earthquake energy budget. From scaling of the source parameters we highlight differences between crustal and deep seismicity, with the latter showing larger fracture energies. The observed increase of radiation efficiency with depth suggests that rupture mechanism for deep and intermediate‐depth events differs. In agreement with previous studies we observe along‐strike variability of rupture properties for deep and intermediate‐depth earthquakes, correlating with slab morphology, plate age, or presence of volcanic structures.