تغییرات تنش گسیختگی کولمب همراه با زمینلرزه سال ۱۳۴۷دشت بیاض(جنوب خراسان)

Displacement of both side blocks of a rupture associated with an earthquake, cause changes in static stress around the rupture and these stress changes effect on the slip planes by load adding and load removing. The stress change on the receiver planes near the source fault are calculable with Coulomb stress method.

In this paper, static stress changes cause by ۱۹۶۸ Dasht-e-Bayaz earthquake on the ruptures associated with Qaenat earthquakes that occurred later, have been calculated by coulomb stress method. These calculated values were plotted and resulted that these changes on the ruptures associated with September ۱,۱۹۶۸ Ferdows earthquake and November ۲۷.۱۹۷۹ Kuly- Boniabad earthquake had been stress rise and load adding. These changes on the rupture associated with November ۱۴,۱۹۷۹ Korizan – Khaf and ۱۹۹۷ Zirkuh earthquake had been stress drop and load removing.