Imperial Fault Zone

The Imperial Fault Zone is a system of geological faults located in Imperial County in the Southern California region, and adjacent Baja California state in Mexico. It cuts across the border between the United States and Mexico.

Los Angeles

San Diego

Mexicali

Salton Sea

Tijuana

Alamo River mouth

Colorado River mouth

Laguna Salada

Yuma

Gulf of California

Colorado River Valley

Cerro Prieto volcano

Imperial fault and surrounding area. The red lines are simplified faults. Right-lateral direction of motion of the transform fault is shown (pink arrows). The red rhombs are pull-apart basins; the northern one is the site of the Niland geothermal field, the southern the Cerro Prieto geothermal field. The Imperial Fault lies in-between.

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