What question did this study set out to answer?

To determine whether dynamic rupture models with cohesive zones yield different corner frequencies and stress drop estimates compared to classical singular crack models.

March 5, 2014Geophysical Journal InternationalOpen Access

Seismic source spectra and estimated stress drop derived from cohesive-zone models of circular subshear rupture

View Full Paper

Ask AI

Bookmark

To determine whether dynamic rupture models with cohesive zones yield different corner frequencies and stress drop estimates compared to classical singular crack models.
Simulated dynamic, radially expanding circular fault ruptures using a cohesive zone that prevents stress singularities at the rupture front.
Computed far-field body wave spectra and spherically averaged corner frequencies in the small-scale yielding limit at a rupture speed of Vr = 0.9β.
Obtained corner frequency coefficients of k = 0.38 for P waves and k = 0.26 for S waves, which are 19% and 24% larger, respectively, than those from the standard Madariaga model.
Demonstrated that applying the standard Madariaga model overestimates earthquake stress drop by a factor of 1.7.
Observed strong dependence of corner frequency on take-off angle, showing that data from limited seismic stations introduce systematic observational bias.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Computational modeling demonstrates higher seismic corner frequencies in cohesive-zone ruptures, indicating conventional models overestimate earthquake stress drops by a factor of 1.7.

Cite This Study

Kaneko et al. (2014) studied this question.

synapsesocial.com/papers/69d8c39c8c03fbaff8bf000f https://doi.org/10.1093/gji/ggu030

View Full Paper

Ask AI

Bookmark

Implication

Computational modeling demonstrates higher seismic corner frequencies in cohesive-zone ruptures, indicating conventional models overestimate earthquake stress drops by a factor of 1.7.

Seismic source spectra and estimated stress drop derived from cohesive-zone models of circular subshear rupture

Key Points

Discussion

Implication

Cite This Study

Seismic source spectra and estimated stress drop derived from cohesive-zone models of circular subshear rupture

Key Points

Discussion

Implication

Cite This Study

Also Consider

Also Consider