| Prel. Rep. | Date | Time(UTC) | Time(Local) | Lat. | Lon. | Depth | Mag. | Region | Waveform |
| 2011/04/21 | 21:23:40.9 | 01:53:40.9 | 33.56 | 52.41 | 15 | ML:3.8 | Esfahan Province, 20 km North of Ardestan |
| Prel. Rep. | Date | Time(UTC) | Time(Local) | Lat. | Lon. | Depth | Mag. | Region | Waveform |
| 2011/04/21 | 21:23:40.9 | 01:53:40.9 | 33.56 | 52.41 | 15 | ML:3.8 | Esfahan Province, 20 km North of Ardestan |