Which fault is associated with a magnitude of 6.7?

The fault associated with a magnitude of 6.7 is the Blind Thrust Fault, which is primarily responsible for the Northridge earthquake that occurred on January 17, 1994. This earthquake was particularly significant due to its impact, as it caused extensive damage in the San Fernando Valley and surrounding areas and resulted in a profound understanding of seismic risk in urban landscapes. The Blind Thrust Fault lies beneath densely populated regions and is characterized by its ability to generate significant seismic events despite not being well defined at the surface.

The Northridge earthquake exemplifies the potential for substantial ground shaking from faults that are not readily visible, leading to the conclusion that it is essential for geologists to assess and understand such faults in urban planning and risk management efforts. This fault's characteristics and the event it produced underline the importance of advanced studies in identifying and monitoring faults that may pose a threat to populated areas.