| When | Fri Sep 21 2012 1:35 PM |
| Where | 15 km north-east of Christchurch |
| Shaking | Moderate |
| Magnitude | 4.2 |
| Depth | 13 km |
| Quality | best |
| Extreme | 0 | |
| Severe | 1 | |
| Strong | 0 | |
| Moderate | 42 | |
| Light | 915 | |
| Weak | 25 | |
| Total | 983 |
| Extreme | 0 | |
| Severe | 1 | |
| Strong | 0 | |
| Moderate | 42 | |
| Light | 915 | |
| Weak | 25 | |
| Total | 983 |