今週のうなぎセミナーについてお知らせいたします。

Here is information of the Unagi-seminar(April, 27).

************** Seminar on Seismology IV A, C /地震学ゼミナールIV A, C (Unagi Seminar) **************

科目：地震学ゼミナールIV A, C / Seminar on Seismology IV A, C（修士・博士）
日時：2023年 4月 27日 (木) 13:15~
場所：京都大学 防災研究所 本館E-232D または オンライン(Zoom)

Date and Time: 2023-04-27, 13:15~
Place: Uji Campus Main Building E232D or Zoom (Hybrid)

　　　　Please join the seminar on-site, especially students who need credit.

Speaker: 村本 智也

Title: Tri-material modeling of strain and stress accumulation in viscoelastic splay fault and subducting oceanic crust

Abstract:
This study constructs a model to represent the strain-stress field surrounding a splay fault and demonstrates the accumulation processes of both strain and stress around the splay fault. We consider the case of multiple fault dislocations, construct the model as a function of the effective viscosity in the media, and investigate the influence of the effective viscosity on the strain and stress accumulation patterns. The results show that the strain and stress tend to accumulate in the splay fault and the subducting oceanic crust, and the rate of accumulation varies with the effective viscosity. The accumulation and relaxation of strain and stress are simultaneous, and the slower the effective viscosity, the slower the accumulation rate. We discuss the relationship between the splay faults, fluid, and intraslab earthquakes. Finally, the possibility that effective viscosity may contribute to the mode of occurrence of intraslab earthquakes at the Hikurangi subduction margin is discussed.