**5. Conclusions**

Crustal faults can be reactivated during some subduction seismic cycles. Their activity is poorly constrained. Some faults have persistent seismic activity, and others appear to be reactivated only after a major subduction earthquake. Some are normal, others are reverse splay faults. The irregular shape in the interplate zone can develop different asperities in successive subduction cycles, and in some of them, crustal faults are reactivated. It is necessary to know the existence of these faults and the seismic potential. Due to their shallow depth, these crustal faults can be another source of seismic hazard, even the traces can be across populated areas. It is necessary to improve the knowledge of the activity of such faults.
