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Controls of seismogenic zone width and subduction velocity on interplate seismicity: Insights from analog and numerical models
Author(s) -
Corbi Fabio,
Herrendörfer Robert,
Funiciello Francesca,
Dinther Ylona
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2016gl072415
Subject(s) - subduction , induced seismicity , geology , seismology , magnitude (astronomy) , seismic moment , series (stratigraphy) , moment (physics) , physics , tectonics , fault (geology) , astrophysics , paleontology , classical mechanics
Abstract Correlations between geodynamic parameters and interplate seismicity characteristics in subduction zones are generally weak due to the short instrumental record and multiparameter influences. To investigate the role of subduction velocity V s and the width of the seismogenic zone W on maximum magnitude M max , seismic rate τ , characteristic recurrence rate τ c , and moment release rate MRR , we use synthetic data sets from simplified analog and numerical models to gain insight into natural subduction zones seismicity. Our models suggest that M max increases with W and is unaffected by V s , τ increases with V s , τ c increases with V s / W , and MRR increases with V s × W . In nature, only the positive correlation between V s and τ is significant. Random sampling of our time series suggest that the positive correlation between V s and τ can be observed with short observation time windows. Other correlations, including M max versus W , become clear only for time window lengths longer than 1/ τ c .