![]() Method based on asymptotic ray theory programed in the RAYINVR software (Zelt and Smith, 1992). From the first arrivals of refractions and reflections of the P wave we performed direct modeling of travel times and relative amplitudes (normalized synthetic seismograms). The arrival Pn wave is observed at three stations located in Laguna Salada and Sierra Juarez. Record sections show seismograms with impulsive P arrivals for nearby stations. As a "reverse shot", for a 47 km section between SLRC and El Mayor Mountain, we used an aftershock M 3.4 of the 2010 M 7.2 El Mayor - Cucapah earthquake. The beginning of the profile is at San Luis Rio Colorado (SLRC), Sonora and its ending is at the middle of Sierra Juarez, Baja California. Records gathered were used to estimate a crust velocity structure model for South Mexicali Valley. The stations, spaced 6 km along a refraction profile, recorded a blast performed in the southwest Arizona near the border with Sonora, Mexico. We installed 16 three-component short period stations (2 Hz) and one broadband station (100 s - 50 Hz). Due to the lack of an appropriate crust model for South Mexicali Valley, a refraction study was conducted. The northern Baja California region consists of two subregions of different geological features: the Peninsular Ranges of Baja California, of granitic composition, and the Mexicali Valley region, characterized by a series of sedimentary basins: the Laguna Salada and the Mexicali Valley. W.A Crustal Velocity Model for South Mexicali Valley, Baja California, México. "Marta Ortega and Carlos Torretta's Wedding Details: Here's Everything We Know About the Spanish "Wedding of the Year" ".
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