Scarps in Steep,Terrain

Cryptic Faulting in

Delta Sediments

Complex Rupture Geometry

STATISTICS106 km x 3-5 km

footprint~350 sq. km at ≥9 points/m2

3.8 billion pts

NSF-RAPID: Airborne LiDAR Survey of the El Mayor-Cucapah Earthquake Surface Rupture(Earthscope & Int’l Programs)UC-Davis (PI Oskin), ASU (Co-PI Arrowsmith) &U. Houston (NCALM)

Cryptic Fault Rupture across Colorado River Delta

+8m elevation+4m

Fault expressed as warping over tens of meters

0.5 m dextral displacement

Comparison to pre-event INEGI 5m-pixel lidar

+1.5m elevation change

-1.5m

Borrego FaultPaso Inferior F.Z.