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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Causes of the N–S compressional aftershocks of the E–W compressional 2008 Iwate–Miyagi Nairiku earthquake (M7.2) in the northeastern Japan arc

Fig. 3

Focal mechanism distributions. Focal mechanisms of earthquakes for the period from 14 June 2008 to 30 September 2008 are shown. a Distribution of reverse-faulting events with E–W compression composing subgroups A (RAEW) and B (RBEW). Dashed black ellipses indicate northern and southern clusters. b Distribution of reverse-faulting events with N–S compression composing subgroups A (RANS) and B (RBNS). c Distribution of normal-faulting events composing subgroups A (NA) and B (NB), and other events (O). The black rectangle indicates the location of the cross sections in Fig. 4. d Distribution of E–W-compressional strike-slip events composing subgroups A (SAEW) and B (SBEW). e Distribution of N–S-compressional strike-slip events composing subgroups A (SANS) and B (SBNS)

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