Crustal and Upper‐Mantle Structure Below Central and Southern Mexico

The Mexican subduction zone is a complex convergent margin characterized by slab with an unusual morphology, abnormal location of the volcanic arc, and existence slow earthquakes (slow slip events tectonic tremors). number seismic imaging studies has increased over past decade. These have revealed wave velocity structure beneath Central Southern Mexico. However, existing tomographic models are either confined to specific areas or coarse resolution. As consequence, they do not capture lateral finer-scale variations in mantle crust structure. Here, we fit frequency-dependent traveltime differences between observed synthetic seismograms three-dimensional model Mexico constrain crustal upper structures jointly. We use ∼3,300 records, filtered 5 50 s, from 74 regional earthquakes. perform point spread function tests assess resolution trade-offs parameters. Our reveals several features. features include geometry Cocos slab, partial melting Trans-Mexican Volcanic Belt, Yucatan diving below Los Tuxtlas Field that consistent previous studies. also identify horizontal lower shallow were previously identified. anomalies may be correlated ultraslow zones high conductivity regions, where been