  Structural and tectonic features in the Pacific Coast of Mexico generate a
high level of seismic activity in the Jalisco block (JB) region, making it one
of the most attractive areas of the world for geophysical investigations. The
Rivera North America contact zone has been the object of different tectonic
studies in recent years framed within the TsuJal project. To this day, this
project is generating numerous crucial geophysical results, which significantly
improve our understanding of the region. Our study is focused on the
interaction between the south of the JB and Rivera plate (RP), which crosses
the Middle America trench. We also cover an offshore onshore transect of 130 km
length between the eastern Rivera fracture zone and La Huerta region, in the
Jalisco state. To characterize this region,we interpreted wide angle seismic,
multichannel seismic, and multibeam bathymetry data. The integration of these
results, with the local and regional seismicity recorded by the Jalisco Seismic
Accelerometric Telemetric Network and by the Mapping the Rivera Subduction Zone
experiment, provides new insights into the geometry of the southern RP, which
is dipping 12 14 degrees under the JB in the northeast southwest direction.
Moreover, our results provide new seismic images of the accretionary wedge, the
shallow crust, the deep crust, and the upper-mantle structure along this
profile.
