Work Description

Title: Results from simulations of earthquake rupture in fault zones with along-strike heterogeneity Open Access Deposited

h
Attribute Value
Methodology
Description
  • Geological and geophysical observations reveal along-strike fault zone heterogeneity on major strike-slip faults, which can play a significant role in earthquake rupture propagation and termination. I present 2D dynamic rupture simulations to demonstrate rupture characteristics in such heterogeneous fault zone structure. The modeled rupture is nucleated in a damaged fault zone and propagates on a preexisting fault towards the zone of intact rocks. There is an intermediate range of nucleation lengths that only allow rupture to spontaneously propagate in the damaged fault zone but not in a homogeneous medium. I find that rupture with an intermediate nucleation length tends to stop when it reaches the zone of intact rocks, especially when the rupture propagation distance in the damaged fault zone is relatively short and when the damaged fault zone is relatively narrow or smooth in the fault-normal direction. Pronounced small-scale heterogeneity within the damaged fault zone also contributes to such early rupture termination. In asymmetric fault zones bisected by a bimaterial fault, rupture moving in the direction of slip of faster rocks tends to terminate under the same conditions as in symmetric fault zones, whereas rupture moving in the direction of slip of slower rocks can penetrate into the zone of intact rocks. Break-through rupture is allowed when a sufficiently-large asperity is located at the edge of the zone of intact rocks. The results suggest the along-strike fault zone heterogeneity can play a critical role in seismicity distribution. The data set contains multiple folders of simulation results from the SEM2DPACK that demonstrate the above findings. The folder name includes the model parameters in each simulation as explained in the README file. The Flt01_sem2d.data file in the folder documents the slip, slip rate and stresses from each simulation. The files are also explained in the manual of SEM2DPACK ( http://web.gps.caltech.edu/~ampuero/soft/users_guide_sem2dpack.pdf). Please refer to section 4.6 in the manual and use “sem2d_read_fault.m” in the POST folder of SEM2DPACK to plot the results.
Creator
Depositor
  • yiheh@umich.edu
Contact information
Discipline
Funding agency
  • Other Funding Agency
Keyword
Resource type
Last modified
  • 01/17/2020
Published
  • 07/08/2018
DOI
  • https://doi.org/10.7302/xsze-db81
License
To Cite this Work:
Huang, Y. (2018). Results from simulations of earthquake rupture in fault zones with along-strike heterogeneity [Data set], University of Michigan - Deep Blue Data. https://doi.org/10.7302/xsze-db81

Relationships

This work is not a member of any user collections.

Files (Count: 11; Size: 5.8 GB)

Thumbnailthumbnail-column Title Original Upload Last Modified File Size Access Actions
README.rtf 2018-08-03 2018-08-03 3.63 KB Open Access
Figure3_fz0.5W1_Lnuc0.4.zip 2018-07-10 2018-07-10 995 MB Open Access
Figure3_homo_Lnuc1.0.zip 2018-07-10 2018-07-10 450 MB Open Access
Figure4_fz0.5W1L4_Lnuc0.6.zip 2018-07-10 2018-07-10 462 MB Open Access
Figure4_fz0.5W1L5_Lnuc0.6.zip 2018-07-10 2018-07-10 448 MB Open Access
Figure6_roughfz0.5W2L4alpha0.2_L...6.zip 2018-07-16 2018-07-16 453 MB Open Access
Figure6_roughfz0.5W2L4alpha0.5_L...6.zip 2018-07-10 2018-07-10 468 MB Open Access
Figure7_assyfz0.50.4W1L4_Lnuc0.6.zip 2018-07-10 2018-07-10 873 MB Open Access
Figure7_assyfz0.50.4W1L6_Lnuc0.6.zip 2018-07-10 2018-07-10 872 MB Open Access
Figure8_fz0.5W1L6_Lnuc0.4_tau0.52.zip 2018-07-10 2018-07-10 459 MB Open Access
Figure8_fz0.5W1L6_Lnuc0.4_tau0.5...5.zip 2018-07-10 2018-07-10 460 MB Open Access

Download All Files (To download individual files, select them in the “Files” panel above)

Total work file size of 5.8 GB may be too large to download directly. Consider using Globus (see below).



Best for data sets > 3 GB. Globus is the platform Deep Blue Data uses to make large data sets available.   More about Globus

Remediation of Harmful Language

The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.