2013 Seddon earthquake

2013 Seddon earthquake

UTC time	2013-07-21 05:09:31
ISC event	603306074
USGS-ANSS	ComCat
Local date	21 July 2013 (2013-07-21)
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 / -41.61; 174.33
Areas affected	New Zealand
Max. intensity	MMI VII (Very strong)
Tsunami	None
Casualties	4 people injured[1]

The 2013 Seddon earthquake measured 6.5 on the M_ww 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.^[2] The United States Geological Survey also measured the quake at 6.5, at a depth of 17 kilometres (11 mi).^[3] 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,^[4] with a second earthquake of similar magnitude occurring on 16 August 2013.