This page documents my ongoing collaborations. Feel free to email me through the contact form at the home page if you'd like to work together!
The erasure of earthquakes from the landscape of Southern California
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Collaborators: J Ramón Arrowsmith (ASU)
Funding: USGS NEHRP Project description: Probabilistic fault displacement hazard analysis (PFDHA) relies on knowledge of the magnitude and distribution of coseismic surface displacements. For a limited number of recent earthquakes, this information is available in detail and can be empirically extracted from rupture maps, field surveys, and post-earthquake digital elevation models. For prior events, this information hides in the landscape, modified by the action of surface processes which begin to reshape the record immediately post-earthquake so that the time elapsed since the most recent event, and the conditions under which these surface processes operate will dictate the information available for mapping a fault from the modern landscape. We apply a suite of 2D surface process models to high-resolution digital elevation models from environments in southern California with different time elapsed since a well-constrained most recent earthquake to quantify the decrease of information available for mapping as a function of time since the event. |
The paleoseismic history and mechanics of the Incapuquio fault system in the Peruvian forearc
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Collaborators: Carlos Benavente (INGEMMET, Peru)
Project description: The Incapuquio Fault System in southern Peru accommodates some of the Naza-South America convergence and produces surface rupturing earthquakes that threaten nearby populations. A group led by Dr. Carlos Benavente at The Instituto Geológico, Minero y Metalúrgico (INGEMMET) works to understand the mechanics and paleoseismic history of the different faults within the Incapuquio system. I started collaborating with Carlos' group as an undergraduate working with Dr. Sarah Hall (College of the Atlantic), when I went in the field with them to collect data for my undergraduate thesis. Since our time in the field, I have continued to collaborate with Carlos' group to understand the frequency and mechanics of multi-fault events across this fault system. Publications: Benavente, C., Palomino, A., Wimpenny, S., Garcia, B., Rosell, L., Aguirre, E., Machare, J., Rodriguez Padilla, A.M., Hall, S.R., Paleoseismic Evidence of the 1715 CE Earthquake on the Purgatorio Fault in Southern Peru: Implications for Seismic Hazard in Subduction Zones. 2022. Tectonophysics. https://www.sciencedirect.com/science/article/abs/pii/S0040195122001494 |
Distributed deformation in surface-rupturing earthquakes
Collaborators: Jing Liu (China Earthquake Administration) and Wenqian Yao
Project description:
Off-fault deformation accounts for ~25-40% of the coseismic surface deformation field. I am collaborating with Jing Liu and her group to understand the surface deformation field from the 2021 Maduo earthquake in the Tibetan Plateau. Stay tuned for more details on this collaboration.
Publications:
Liu-Zeng, J., Liu, J., Liu, X., Milliner, C.W., Avouac, J.P., Rodriguez Padilla, A. M., Xu, S., Yao, W., Klinger, Y., Han, L., Shao, Y., Yan, X., Aati, S., Shao, Z.,. Multifault rupture of the Mw 7.4 Maduo (China) earthquake reveals fault growth toward a stress-favored orientation. Under review.
Project description:
Off-fault deformation accounts for ~25-40% of the coseismic surface deformation field. I am collaborating with Jing Liu and her group to understand the surface deformation field from the 2021 Maduo earthquake in the Tibetan Plateau. Stay tuned for more details on this collaboration.
Publications:
Liu-Zeng, J., Liu, J., Liu, X., Milliner, C.W., Avouac, J.P., Rodriguez Padilla, A. M., Xu, S., Yao, W., Klinger, Y., Han, L., Shao, Y., Yan, X., Aati, S., Shao, Z.,. Multifault rupture of the Mw 7.4 Maduo (China) earthquake reveals fault growth toward a stress-favored orientation. Under review.
