Figure 4: 3-D visualization of locations of the main shock hypocenter (white ellipsoid) and the best located aftershocks (green ellipsoids) from the March 9, 1994 (MW 7.6) deep earthquake. The ellipsoids denote the 95% confidence regions for the relative position of each earthquake. The yellow plane (viewed nearly edge-on) represents the plane that best fits the aftershock locations, and is nearly coincident with one of the nodal planes of the main shock focal mechanism.
