The Benioff-Wadati zone refers to a subduction zone where an oceanic plate is being forced under a continental plate or another oceanic plate. Earthquakes within this zone occur due to the movement of the subducting plate, which is characteristic of the subduction zone setting.
| Group I | Group II | ||
| P | Iceland | 1 | Subduction Zone |
| Q | Indonesia | 2 | Transform Fault |
| R | Nepal | 3 | Mid-Oceanic Ridge |
| S | New Zealand | 4 | Continental Collision |