2021 Kermadec Islands earthquakes
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The 2021 Kermadec Islands earthquakes were a series of earthquakes with magnitudes of 8.1 and 7.4 that occurred at 19:28:31 UTC on 4 March 2021. The epicentres were located southeast of Raoul Island in the Kermadec Islands, part of the New Zealand outlying islands.[6] The main magnitude 8.1 earthquake was preceded by a magnitude 7.4 foreshock[7] and followed by a magnitude 6.1 aftershock.[8] A separate, unrelated magnitude 7.3 earthquake occurred off the coast of the North Island of New Zealand, approximately 900 km to the south, several hours before the main quakes.[9] More than a dozen aftershocks exceeded magnitude 6.[10]
Quick Facts UTC time, ISC event ...
UTC time | 2021-03-04 17:41:25 |
---|---|
2021-03-04 19:28:31 | |
ISC event | 619918421 |
620360228 | |
USGS-ANSS | ComCat |
ComCat | |
Local date | March 5, 2021 (2021-03-05) |
Local time | 06:41:25 NZDT |
08:28:31 NZDT | |
Magnitude | 7.4 Mw[1] |
8.1 Mw[2] | |
Depth | 43.0 km (27 mi) |
28.9 km (18 mi) | |
Epicentre | 29.735°S 177.282°W / -29.735; -177.282 |
Fault | Kermadec-Tonga subduction zone |
Type | Megathrust |
Areas affected | New Zealand; Pacific islands |
Total damage | Limited |
Max. intensity | MMI VIII (Severe) |
Peak acceleration | 0.75 g[3] |
Tsunami | Up to 2.4 m (7.9 ft) in Raoul Island.[4][5] |
Casualties | Several injured[4][better source needed] |
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