Was the volcano that killed Harry's girlfriend in the opening scene in the same tectonic setting as Dante's Peak?

Yes, the volcano that killed Harry's girlfriend in the opening scene of "Dante's Peak" is depicted as being in the same tectonic setting as the fictional town of Dante's Peak itself. Both are located along a subduction zone, where one tectonic plate is forced under another, creating volcanic activity. This geological setting contributes to the type of explosive eruptions seen in the film.