Sharp structural variability of the Gorda slab imaged by a fiber array
James Atterholt, Jeffrey J McGuire, Andrew J Barbour, Morgan P Moschetti · 2026
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Description
James Atterholt, Jeffrey J McGuire, Andrew J Barbour, and Morgan P Moschetti image the buried Gorda slab in 2026 using a fiber-optic cable as a dense seismic sensor array. The slab dives beneath the southern Cascadia Subduction Zone, where the fault interface is deep and quiet, hiding the roughness that steers giant earthquakes.
Their method picks out waves converted at the slab boundary and compares their timing and polarity along the cable at fine spacing. Results suggest kilometer-scale interface roughness, plus changes in crust thickness and slab depth over short distances. Converted waves also hint that fluids appear and vanish sharply within the slab and the crust above it, sharpening the picture used for earthquake thinking.
Catalog record
| CREATOR | James Atterholt, Jeffrey J McGuire, Andrew J Barbour, Morgan P Moschetti |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 57 KB |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |