1994 M6.7 Northridge, CA Shakemap

map of Los Angeles area with different gradational colors

Detailed Description

The 1994 M6.7 Northridge, CA Shakemap showing MMI (Modified Mercalli Intensity) levels of shaking, with the earthquake epicenter shown as a red star, and the fault shown as a rectangle. The innermost dotted circle doesn’t include the communication or reaction time latency (area labeled BZ); the next dash-dotted circle includes the 2-second communication latency (area labeled CZ), and the next dashed circle also includes the 5-second reaction time (labeled RZ). Most residents in the area of the strongest shaking (red area) did not receive any warning. The outermost blue dash-dotted circle shows the location of the P wave at the warning time, suggesting that most residents of the strongly shaken area would have been alerted by the P-wave itself before they received a warning from the EEW system.

Details

Image Dimensions: 937 x 1062

Location Taken: Northridge, CA, US