Seafloor geodesy unveils seismogenesis of large subduction earthquakes in Mexico.

ABSTRACT: Based on measurements of near-trench deformations of the oceanic and overriding plates, in this investigation, we elucidate the tectonic and mechanical processes leading to the M_w7.0 (moment magnitude of 7.0) Acapulco, Mexico, earthquake in 2021. We exploit unprecedented ocean-bottom observations using ultralong-period "tilt mechanical amplifiers," along with hydrostatic pressure, global navigation satellite system, and satellite interferometric synthetic aperture radar data. The joint inversion of these geodetic data, template-matching seismicity, and repeating earthquakes, revealed the first two shallow slow slip events (SSEs) observed in Mexico. The first one migrated from the trench to the earthquake hypocenter before rupture, and the second one occurred following an

SUBMITTER: Cruz-Atienza VM 

PROVIDER: S-EPMC12422193 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature