2013 Seddon earthquake
| UTC time | 2013-07-21 05:09:31 |
|---|---|
| ISC event | 603306074 |
| USGS-ANSS | ComCat |
| Local date | 21 July 2013 |
| Local time | 5:09:30 pm NZST |
| Magnitude | 6.5 Mww |
| Depth | 13 kilometres (8 mi) |
| Epicentre | 41°37′S 174°20′E / 41.61°S 174.33°E |
| Areas affected | New Zealand |
| Max. intensity | MMI VII (Very strong) |
| Tsunami | None |
| Casualties | 4 people injured |
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The 2013 Seddon earthquake measured 6.5 on the Mww scale and was centred in New Zealand's Cook Strait, around 20 kilometres (12 mi) east of the town of Seddon in Marlborough. The earthquake struck at 5:09 pm on Sunday 21 July 2013 (05:09 UTC) at a depth of 13 kilometres (8 mi), according to GeoNet. The United States Geological Survey also measured the quake at 6.5, at a depth of 17 kilometres (11 mi). The quake caused moderate damage in the wider Marlborough area and Wellington, the nation's capital city 55 kilometres (34 mi) north of the epicentre. Only minor injuries were reported. Several aftershocks occurred during 21–29 July.
The Seddon earthquake is considered the first of an earthquake doublet, with a second earthquake of similar magnitude occurring on 16 August 2013.