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. 2015 Oct 26;5:15560. doi: 10.1038/srep15560

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Copyright © 2015, Macmillan Publishers Limited

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(Upper panel) The b value in the GR law as function of the rake angle λ is extrapolated from the results of Schorlemmer et al.⁶ for Southern California. Different colors correspond to the Aki Richards convention for faulting styles: normal (green), strike-slip (red), thrust (blue) faults. (Central Panel) The c value of the Omori law as a function of the rake angle is evaluated for the Southern California region. Results refer to mainshock magnitudes in the range [2.5:4.5] and aftershocks with magnitudes larger than 2.4. Data are in very good agreement with results by Narteau et al.⁴ in their Fig. 1b. (Lower Panel) The normalized size of the aftershock area L_a as a function of the rake angle λ for the Southern California catalog. We have applied the same criterion as in the central panel to identify mainshocks and considered as aftershocks all events with occurring within 3.3 km and 10 minutes after the mainshock occurrence.

Inline graphic — (Upper panel) The b value in the GR law as function of the rake angle λ is extrapolated from the results of Schorlemmer et al.⁶ for Southern California. Different colors correspond to the Aki Richards convention for faulting styles: normal (green), strike-slip (red), thrust (blue) faults. (Central Panel) The c value of the Omori law as a function of the rake angle is evaluated for the Southern California region. Results refer to mainshock magnitudes in the range [2.5:4.5] and aftershocks with magnitudes larger than 2.4. Data are in very good agreement with results by Narteau et al.⁴ in their Fig. 1b. (Lower Panel) The normalized size of the aftershock area L_a as a function of the rake angle λ for the Southern California catalog. We have applied the same criterion as in the central panel to identify mainshocks and considered as aftershocks all events with occurring within 3.3 km and 10 minutes after the mainshock occurrence.