Two Possible Focal Mechanism Solutions

two circles showing two possible focal mechanism solutions

Detailed Description

Two Possible Focal Mechanism Solutions. Without additional information, every focal mechanism has two possible fault orientations. This strike-slip example could be a left-lateral fault (left) or a right-lateral fault (right).

Details

Image Dimensions: 1072 x 714

Location Taken: US

Credits

Sketch by Lisa Wald, USGS.