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2022 Seismic Cylces

2021–2022 Seismic Cycles Webinar Series

The Seismic Cycles Working Group presents this weekly seminar series in preparation for a virtual symposium this fall on seismic cycles modeling. The weekly seminar series will stretch until July 2022. Each week, we invite two speakers to give a 30-minute talk relevant to the following themes: 1) Physics-based foreshock and aftershock modeling: what can explain the observed rate of aftershocks and the possible origins of the Gutenberg-Richter frequency-size distribution. 2) The arrest and initiation of ruptures: what determines the size of an earthquake, the control of geometric, material, and dynamic heterogeneities on the frequency-size distribution and rupture style. 3) Modeling of slow slip and tremors: how to reconcile the time scales of slow-slip events and individual tremors and how to simulate the source mechanisms of tremors and low-frequency earthquakes. 4) Physics-based friction laws: what fault-zone physical processes must be incorporated, what are the important physical feedback mechanisms that operate across the seismic cycle, and what explains the evolution of effective friction parameters with temperature and water content. And finally, 5) Impact of fluids on the seismic cycle: what are the relevant chemical and physical processes connecting fluid injection (e.g., hydraulic fracturing) with induced seismicity, what is the role of poroelasticity.
All webinars begin at 9A PDT.

  May 6

Physics-based foreshock and aftershock modeling
1. Mainshock and aftershock sequence simulations in a nonplanar fault network
So Ozawa, University of Tokyo
2. Rupture styles and recurrence patterns in seismic cycles linked to physical properties of the fault zone
Shiying Nie, University of Southern California

  May 13  

Arrest and initiation of rupture: insight from structural and frictional heterogeneities
1. Many ways to slip: aseismic fault creep and its transition to dynamic rupture
Sohom Ray,  IIT Roorkee
2. Theoretical insights on the arrest of earthquake rupture
Pablo Ampuero, University of Géoazur

  May 20

Adding more physics into the friction law, what are the implications about the seismic cycle?
1. Implementation of quasistatic viscoelasticity and poroelasticity using memory variables into dynamic earthquake sequence simulation with SBIEM
Hiroyuki Noda, Kyoto University
2. Fault-size dependent fracture energy, seismogenesis, and cascading rupture on multi-scale fault networks
Dmitry Garagash, Dalhousie University

  June 3

Modeling of slow-slip and tremors.
1. Cycles of slow slip events on non-planar subduction faults and their implications on megathrust earthquakes
Duo Li, Ludwig-Maximilians-Universität München
2. Modeling spontaneous and triggered slow-slip events at the Hikurangi subduction plate interface
Bunishiro Shibazaki, Building Research Institute
3. Numerical modeling of deep long- and short-term SSEs in the Nankai and Hyuganada region
Takanori Matsuzawa, National Research Institute for Earth Science and Disaster Resilience

  July 8

Fluid injection and the seismic cycle?
1. A spectral boundary-integral method for faults and fractures in a poroelastic solid: Simulations of a rate-and-state fault with dilatancy, compaction, and fluid injection.
Elias R. Heimisson, ETH Zürich
2.  Fluids in earthquake cycle models.
Pierre Dublanchet, MINES ParisTech

  June 17

Fluids and heterogeneities
1. Earthquake cycle simulations with creep compaction and dilatancy. 
Yuyun Yang, Stanford University
2. Seismic cycles and earthquake statistics on heterogeneous faults. 
Camilla Cattania, Massachusetts Institute of Technology

  July 1

Foreshocks, aftershocks, and roughness
1. Modeling the earthquake cycle and fault zone evolution with the mortar finite element method
Yuval Tal, Ben-Gurion University of the Negev
2. Modeling shallow slow slip events along the Hikurangi margin: Insights into their segmentation and the effect of pore-pressure cycling
Andrea Perez-Silva, Victoria University of Wellington

Full playlist [YouTube]