It was not (at my location at least) strong enough to cause any damage - except maybe to my nerves. NZ apartment buildings bounce and vibrate and creak quite well.
It was a 5.2 - a respectable minor shake.
Details from GNS Science / GeoNet:
| NZ Standard Time: | Friday, 28 August 2009 at 2:10 am |
| Latitude, Longitude: | 41.44°S, 174.72°E |
| Location: | 20 km south of Wellington |
| Focal depth: | 30 km |
| Richter magnitude: | 5.2 |
Shaking reports
Update: there have been aftershocks, but none of it did any damage. More info