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Strong mag. 5.9 earthquake - South Pacific Ocean, 1429 km northeast of Wellington, New Zealand, on Friday, 21 September 1951 at 18:44 (GMT)
Strong magnitude 5.9 earthquake at 21 km depth
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Date & time: 21 Sep 1951 18:44:54 UTC
Magnitude: 5.9Depth: 21.4 km
Epicenter latitude / longitude: 29.915°S / 177.848°W
(
South Pacific Ocean,
New Zealand)
Nearest volcano:
Macauley Island (68 km / 42 mi)
Primary data source:
USGS (United States Geological Survey)
Estimated released energy: 4.5 x 10
13 joules (12.4 gigawatt hours, equivalent to 10676 tons of TNT or 0.7 atomic bombs!)
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Data for the same earthquake reported by different agencies
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| Magnitude | Depth | Location | Source |
| M 5.9 | 21 km | Kermadec Islands, New Zealand | USGS |
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.
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Aftershocks
More info
Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. 79 km
2 (=31 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 15 km (10 mi).
Aftershocks typically occur during the days and weeks following the quake at or near the same fault, at distances of up to approx. two times the length of the rupture zone.
The often broadly linear arrangement of aftershock epicenters encompasses the rupture zone of the main shock (check on the
map below to verify).
Earlier earthquakes in the same area
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