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Jimmy Atterholt

@atterholt.bsky.social
1.8K followers 196 following 17 posts

Seismologist 🌎 Caltech Seismo Lab PhD 🌎 Earthquakes and Structure 🌎 Puppies and Hot Beverages

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Reposted by Jimmy Atterholt
Eli Bird @elibird.bsky.social · 16/06/2026
New paper with @atterholt.bsky.social, Yan Yang, Ettore Biondi, and Zhongwen Zhan: seismica.library.mcgill.ca/article/view... Coda phases are easily identified on DAS and provide a powerful constraint on structure. We use Ps phases to image a slumped block in Owens Valley, CA at high resolution.
seismica.library.mcgill.ca
Imaging the North Bishop Block with Ambient Noise and Converted Phases Observed through Fiber-Optic Seismology
Located in eastern California, Owens Valley is a rift basin in the western Basin and Range Province, bounded by the Sierra Nevada and White Mountains. While the basin has been the site of extensive ge...
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Jimmy Atterholt @atterholt.bsky.social · 22/12/2025
Our paper was recently featured in Scientific American. They made a neat graphic for it, too. Check it out: www.scientificamerican.com/article/tele...
scientificamerican.com
Scientists Saw an Earthquake in Incredible Detail—Using Telecom Cables
Fiber optics that connect the world can detect its earthquakes, too
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Reposted by Jimmy Atterholt
Jimmy Atterholt @atterholt.bsky.social · 26/09/2025
New paper in Science! We used a fiber-optic array to tackle the tricky problem of imaging an offshore earthquake (2024 M7 Mendocino Fault EQ). In the process, we learned new things about supershear transitions and how fiber arrays could help with EEW. Read more here: www.science.org/doi/10.1126/...
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Jimmy Atterholt @atterholt.bsky.social · 26/09/2025
New paper in Science! We used a fiber-optic array to tackle the tricky problem of imaging an offshore earthquake (2024 M7 Mendocino Fault EQ). In the process, we learned new things about supershear transitions and how fiber arrays could help with EEW. Read more here: www.science.org/doi/10.1126/...
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Jimmy Atterholt @atterholt.bsky.social · 23/05/2025
Wonderful popular science article on using buried fibers to do interesting science. There’s also a nice description of my work at Caltech imaging the SoCal Moho and of what we’re trying to do at the USGS with a fiber in southern Cascadia. Worth a read!
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Reposted by Jimmy Atterholt
Eli Bird @elibird.bsky.social · 20/02/2025
New paper in AGU Advances! We constrained models of dike opening in the recent Icelandic eruptions through observations of dv/v on DAS. Thank you to the many co-authors who made it possible, especially my advisor Zhongwen Zhan. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
Constraining Dike Opening Models With Seismic Velocity Changes Associated With the 2023–2024 Eruption Sequence on the Reykjanes Peninsula
Subsurface deformation associated with the 2023–2024 eruption sequence on the Reykjanes Peninsula produces a pronounced dv/v signal The observed dv/v signal is inverted for a model of dike-openin...
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Reposted by Jimmy Atterholt
Jimmy Atterholt @atterholt.bsky.social · 21/01/2025
New paper out! Last chapter of my PhD. We made a long-term seismicity and MT catalog for Ridgecrest using a state-of-the-art workflow. We then used the catalog to make new insights on the stress evolution throughout the sequence using point process theory. Check it out here: doi.org/10.1093/gji/...
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Jimmy Atterholt @atterholt.bsky.social · 21/01/2025
New paper out! Last chapter of my PhD. We made a long-term seismicity and MT catalog for Ridgecrest using a state-of-the-art workflow. We then used the catalog to make new insights on the stress evolution throughout the sequence using point process theory. Check it out here: doi.org/10.1093/gji/...
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Jimmy Atterholt @atterholt.bsky.social · 03/12/2024
Nice overview of our recent paper for Caltech news:
caltech.edu
New Technique to Look Deep Within Tectonic Plates
New technology makes it possible and affordable to image Earth’s crust–mantle boundary at very high resolution.
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Reposted by Jimmy Atterholt
Jimmy Atterholt @atterholt.bsky.social · 27/11/2024
DAS meets the Moho! New paper in Science Advances w/ Zhongwen Zhan. We developed a method for finding Moho reflections in DAS data. One event can yield 10s of km of fine-scale Moho depth measurements. We applied it to dozens of SoCal events and learned a lot about the Garlock, Coso, and more.
doi.org
Fine-scale Southern California Moho structure uncovered with distributed acoustic sensing
The Moho reflected phase measured by DAS shows abrupt crustal thickness changes across the Garlock Fault and Coso Volcanic Field.
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Jimmy Atterholt @atterholt.bsky.social · 27/11/2024
DAS meets the Moho! New paper in Science Advances w/ Zhongwen Zhan. We developed a method for finding Moho reflections in DAS data. One event can yield 10s of km of fine-scale Moho depth measurements. We applied it to dozens of SoCal events and learned a lot about the Garlock, Coso, and more.
doi.org
Fine-scale Southern California Moho structure uncovered with distributed acoustic sensing
The Moho reflected phase measured by DAS shows abrupt crustal thickness changes across the Garlock Fault and Coso Volcanic Field.
2143
Jimmy Atterholt @atterholt.bsky.social · 27/11/2024
So glad there are people in this world willing to port old compiled codes to python. Often thankless but super impactful work.
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Jimmy Atterholt @atterholt.bsky.social · 20/11/2024
First post is a plug for our new paper on the Cascadia SZ led by Hao Guo. We carefully relocated events in the Gorda slab and computed their source parameters. Our results suggest lower effective stress in the slab crust and, by extension, the megathrust! Check it out here: doi.org/10.1785/0220...
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