| Prel. Rep. | Date | Time(UTC) | Time(Local) | Lat. | Lon. | Depth | Mag. | Region | Waveform |
| 2011/04/01 | 15:09:48.9 | 19:39:48.9 | 37.18 | 54.61 | 45 | ML:2.6 | Golestan Province, 23 km North-East of Aq Qaleh | ||
| 2011/03/27 | 06:32:32.0 | 11:02:32.0 | 37.45 | 55.96 | 11 | ML:2.9 | Golestan Province, 42 km East of Kalaleh | ||
| 2011/03/22 | 03:46:56.3 | 08:16:56.3 | 36.89 | 55.28 | 14 | ML:2.5 | Golestan Province, 18 km South-East of Ramian | ||
| 2011/03/07 | 06:02:03.9 | 09:32:03.9 | 36.06 | 54.94 | 31 | ML:2.8 | Semnan Province, 40 km South of Shahrud |