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  5. Data from: Earthquake rupture interactions with a high normal stress bump

Data from: Earthquake rupture interactions with a high normal stress bump

File(s)
CebrySorhaindoMcLaskey_JGR2023_README.rtf (69.85 KB)
CebrySorhaindoMcLaskey_JGR2023_DIC_Benchmark_tests.tar (93.6 MB)
CebrySorhaindoMcLaskey_JGR2023_DIC_experiment.tar (647.8 MB)
CebrySorhaindoMcLaskey_JGR2023_Experiments.tar (141.23 MB)
Permanent Link(s)
https://doi.org/10.7298/0bdb-t883
https://hdl.handle.net/1813/113268
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Laboratory Earthquakes from the Cornell 3 m apparatus
Author
Cebry, Sara B. L.
Sorhaindo, Kian
McLaskey, Gergory C.
Abstract

These files contain data supporting all results reported in Cebry et al. Earthquake rupture interactions with a high normal stress bump. In Cebry et al. we found: To better understand how normal stress heterogeneity affects earthquake rupture, we conducted laboratory experiments on a 760 mm PMMA sample with a 25 mm “bump” of locally higher normal stress. We systematically varied the sample-average normal stress and bump prominence. For bumps with low prominence (bump normal stress over sample average normal stress < 6) the rupture simply propagated through the bump and produced regular sequences of periodic stick-slip events. Bumps with higher prominence (>6) produced complex rupture sequences with variable timing and ruptures sizes, and this complexity persisted for multiple stick-slip supercycles. During some events the bump remained locked and acted as a barrier that completely stopped rupture. In other events, a dynamic rupture front terminated at the locked bump, but rupture reinitiated on the other side of the bump after a brief pause of 0.3-1 ms. Only when stress on the bump was near critical did the bump slip and unload built up strain energy in one large event. Thus, a sufficiently prominent bump acted as a barrier (energy sink) when it was far from critically stressed and as an asperity (energy source) when it was near critically stressed. Similar to an earthquake gate, the bump never acted as a permanent barrier. In the experiments, we resolve the above rupture interactions with a bump as separate rupture phases; however, when observed through the lens of seismology, it may appear as one continuous rupture that speeds up and slows down. The complicated rupture-bump interactions also produced enhanced high frequency seismic waves recorded with piezoelectric sensors.

Sponsorship
National Science Foundation grant EAR-1847139
Date Issued
2023-06-21
Keywords
laboratory earthquake
•
barrier
•
asperity
•
rupture interaction
•
earthquake gate
Related Publication(s)
Cebry, Sara B. L., Kian Sorhaindo, and Gregory C. McLaskey. “Laboratory Earthquake Rupture Interactions with a High Normal Stress Bump.” Journal of Geophysical Research: Solid Earth 128, no. 11 (2023): e2023JB027297. https://doi.org/10.1029/2023JB027297.
Link(s) to Related Publication(s)
https://doi.org/10.1029/2023JB027297
Rights
CC0 1.0 Universal
Rights URI
http://creativecommons.org/publicdomain/zero/1.0/
Type
dataset

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