Fig. 5
From: An analysis of a moderate earthquake, eastern flank of the Red Sea, Saudi Arabia
Plot showing the variance reduction and double-couple focal mechanisms of the mainshock as a function of focal depths and origin times. In this plot the variance reduction is proportional to the dimension of the beach ball double-couple mechanism. The optimum origin time is + 1 s shifted relative to the earthquake origin time of 01 h, 06 min, and 52 s. The optimum solution reveals a focal depth of 18 km