• Source: 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.




Geology


The Imperial Fault Zone is a right lateral-moving strike-slip fault, representing the northernmost transform fault associated with the East Pacific Rise. It is connected to the San Andreas Fault by the Brawley Seismic Zone. It terminates on its southern end at the Cerro Prieto spreading center.
The Imperial Fault Zone is thought to accommodate slip from both the San Andreas and the San Jacinto fault zones. However, studies covering the last few hundred years show that the slip rate is insufficient to account for the total slip from the San Andreas system. The surface trace is well-located based on mapped surface offsets from historic events.




Earthquake history


The Imperial Fault Zone has a history of earthquakes of moderate magnitude, including several doublet earthquakes.

1915 Imperial Valley earthquakes: Two magnitude 6.25 shocks occurred ~1 hour apart. Six people died and several were injured in the second quake at Mexicali, located just inside the Mexican border. Unstable banks of the New and Alamo Rivers caved in many places.
1940 El Centro earthquake
1979 Imperial Valley earthquake
2010 Baja California earthquake




See also


Cerro Prieto Fault
Gulf of California Rift Zone
Salton Trough




References






Further reading


Thomas, A. P.; Rockwell, T. K. (1996). "A 300- to 550-year history of slip on the Imperial fault near the U.S.-Mexico border: Missing slip at the Imperial fault bottleneck". Journal of Geophysical Research: Solid Earth. 101 (B3): 5987–5997. doi:10.1029/95jb01547. ISSN 0148-0227.
Rockwell, T. K.; Klinger, Y. (2023). "2000 yrs of earthquakes inferred from subsidence events on the Imperial fault, California: Effect of lake-level changes and implication for variable slip rates" (PDF). Earth and Planetary Science Letters. 618. doi:10.1016/j.epsl.2023.118271. ISSN 0012-821X.




External links


Southern California Earthquake Data Center website: Imperial Fault Zone.

Kata Kunci Pencarian:

• Gempa Mars
• Benito Mussolini
• Imperial Fault Zone
• San Andreas Fault
• List of fault zones
• San Jacinto Fault Zone
• 1915 Imperial Valley earthquakes
• Southern California
• Gulf of California Rift Zone
• Brawley Seismic Zone
• List of seismic faults in Mexico
• Salton Sink