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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Why do aftershocks occur? Relationship between mainshock rupture and aftershock sequence based on highly resolved hypocenter and focal mechanism distributions

Fig. 8

Characteristics of the focal mechanisms around the mainshock fault. a Relationship between the hypocenter distance from Fault 1 or 2 and the Kagan angle from the reference focal mechanisms. b Rose diagram showing the strike of nodal planes for the focal mechanisms of strike-slip type, the plunges of the P- and T-axes of which are less than or equal to 30°. We selected the nodal plane for which the strike is closer to that of the best-fit plane. The thick black line indicates the strike of the best-fit plane. c Spatial distribution of the nodal plane strike closer to that of Fault 1 or 2. The red and gray lines indicate nodal planes of strike-slip type and other types, respectively. Note that the vertical and horizontal axes, respectively, indicate the directions along and normal to the best-fit plane

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