| Prel. Rep. | Date | Time(UTC) | Time(Local) | Lat. | Lon. | Depth | Mag. | Region | Waveform |
| 2011/05/15 | 11:22:31.3 | 15:52:31.3 | 35.89 | 51.89 | 33 | ML:2.5 | Mazandaran Province, 26 km North-West of Damavand | ||
| 2011/05/12 | 16:55:31.9 | 21:25:31.9 | 34.73 | 52.63 | 29 | ML:2.7 | Semnan Province, 61 km South-East of Garmsar | ||
| 2011/05/08 | 22:15:31.0 | 02:45:31.0 | 34.56 | 52.44 | 15 | ML:2.6 | Semnan Province, 74 km South-East of Garmsar | ||
| 2011/05/08 | 04:02:58.5 | 08:32:58.5 | 34.87 | 52.65 | 15 | ML:3.2 | Semnan Province, 49 km South-East of Garmsar |