
| Prel. Rep. | Date | Time(UTC) | Time(Local) | Lat. | Lon. | Depth | Mag. | Region | Waveform |
| 2007/12/20 | 23:20:03.1 | 02:50:03.1 | 36.62 | 54.93 | 16 | ML:4.1 | 22 km North of Shahrud, Semnan Province |

| Prel. Rep. | Date | Time(UTC) | Time(Local) | Lat. | Lon. | Depth | Mag. | Region | Waveform |
| 2007/12/20 | 23:20:03.1 | 02:50:03.1 | 36.62 | 54.93 | 16 | ML:4.1 | 22 km North of Shahrud, Semnan Province |