**5. Crustal model**

There are several studies on crustal models for eastern Canada (e.g., [23, 24]). Rayleigh-wave dispersion data from the 23 June 2010 MW 5.2 earthquake about 60 km northeast of Ottawa, Ontario [25], were used to obtain 14 crustal velocity models around the epicenter [24]. The Rayleigh wave travel paths for model No. 8 ran approximately through the Miramichi region.

In recent years, some shallow, small earthquakes occurred in the Miramichi region. Those small earthquakes generated Rg–wave (Rayleigh waves traveling in the crust) records. Using the Rg–wave dispersion data, models for the shallow part of the crust (0–10 km) were obtained [26]. A velocity model was formed for the Miramichi region by replacing the shallow part of the model by Motazedian et al. [24] with the model reported by Ma [26]. The Vp/Vs ratio is assumed to be 1.74.
