Search results
Results From The WOW.Com Content Network
The Northridge Blind Thrust Fault (also known as the Pico Thrust Fault) is a thrust fault that is located in the San Fernando Valley area of Los Angeles.It is the fault that triggered the M w 6.7 1994 Northridge earthquake which caused $13–50 billion in property damage (equivalent to 24–93 billion today) and was one of the costliest natural disasters in U.S. history.
Several other faults experienced minor rupture during the main shock and other ruptures occurred during large aftershocks, or triggered events. [12] The previously undiscovered fault that ruptured in 1994 was subsequently named the Northridge Blind Thrust Fault or Pico Thrust Fault. [13]
Blind thrust faults generally exist near tectonic plate margins, in the broad disturbance zone. They form when a section of the Earth's crust is under high compressive stresses, due to plate margin collision, or the general geometry of how the plates are sliding past each other. Diagram of blind-thrust faulting
The Puente Hills thrust fault system is in a broad zone directly underneath the densest parts of the L.A. area, including downtown Los Angeles, which has many old and unretrofitted buildings, as ...
The Los Angeles Basin is situated along the coast of Southern California at the confluence of the Transverse Ranges and the Peninsular Ranges.The basin is under the influence of several strike-slip and blind thrust faults with geodetic studies providing evidence of the northern basin being shortened in the north–south or northeast–southwest directions at a rate of 4.5–5 millimetres (0.18 ...
If the fault plane terminates before it reaches the Earth's surface, it is called a blind thrust fault. Because of the lack of surface evidence, blind thrust faults are difficult to detect until rupture. The destructive 1994 earthquake in Northridge, Los Angeles, California, was caused by a previously undiscovered blind thrust fault.
The Northridge earthquake was a buried rupture earthquake, [1] which caused massive surface damage. In seismology, a buried rupture earthquake, or blind earthquake, is an earthquake which does not produce a visible offset in the ground along the fault (as opposed to a surface rupture earthquake, which does).
Scientists have suggested that the San Joaquin Hills have been formed by uplift [2] from a blind thrust fault line lying eight miles below the hills similar to the one that produced the 1994 Northridge Earthquake. [3]