eprintid: 2093 rev_number: 9 eprint_status: archive userid: 6 dir: disk0/00/00/20/93 datestamp: 2018-06-07 09:50:14 lastmod: 2019-01-23 15:08:14 status_changed: 2018-06-07 09:50:14 type: article metadata_visibility: show creators_name: Tahir, Mohammad creators_name: Grasso, Jean-Robert corp_creators: Micro Seismic Studies Progamme (MSSP), Islamabad, Pakistan. corp_creators: Université Grenoble Alpes Grenoble, France. title: Faulting Style Controls for the Space–Time Aftershock Patterns subjects: MP2 divisions: EPOS-IP full_text_status: none abstract: To understand the complexity and thus to predict earthquake occurrence insize, time, and space, seismicity patterns are characterized by two robust empirical laws:the exponential distribution of magnitude and the power law decrease of aftershock rateover time. These laws are known as the Gutenberg–Richter law and the Omori law, re-spectively. Using global earthquake catalogs, we resolve that on average the K(after-shock productivity) and the p-value (exponent of the power law decrease of aftershockrate over time) are dependent on the mainshock faulting style. Strike-slip events have alower aftershock rate (N)andK-values and a larger p-value than thrust and normalevents, respectively. Within the epidemic-type aftershock sequence model, strong K,Nvalues are driven by a high-branching ratio value (n). Within the same framework, arelatively higher nvalue for the thrust events also predicts the lower p-value we observefor thrust events as compared to strike-slip and normal-faulting events, respectively.Furthermore, we observed that earthquake interactions through time and space area function of the faulting style when measured by μt, the exponent of the power lawdecrease of earthquake density over space. The μtvalues of thrust events for differ-ent time windows always remain smaller than those of the strike-slip events. Whenchanges in faulting styles are driven by stress pattern, the Anderson faulting theorypredicts thrust faulting that requires somewhat larger stresses, in absolute magnitude,than do normal and strike-slip faulting. Within the framework of rate-and-state frictionlaw, changes in the stress heterogeneity patterns reproduce the p-value changes weobserve. Our results suggest that only stress perturbations associated with mainshockrupture affect the productivity and decay rate over time of aftershocks date: 2015 date_type: published publication: Bulletin of the Seismological Society of America volume: 105 number: 5 publisher: Seismological Society of America pagerange: 2480-2497 id_number: doi:10.1785/0120140336 issn: 0037-1106 official_url: http://doi.org/10.1785/0120140336 access_IS-EPOS: limited software_references: Earthquake_interactions-mainshock_scale software_references: Earthquake_interactions-georesource_scale owner: Publisher citation: Tahir, Mohammad and Grasso, Jean-Robert (2015) Faulting Style Controls for the Space–Time Aftershock Patterns. Bulletin of the Seismological Society of America, 105 (5). pp. 2480-2497. DOI: https://doi.org/10.1785/0120140336