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2021 Kermadec Islands earthquakes

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As of January 27 2023, there have been at least 2,847 aftershocks above 4.0 magnitude, and 13 of them above magnitude 6. A magnitude 7.1 earthquake struck close to Raoul Island on 24 April 2023, over two years after the mainshock. It is currently the largest aftershock of the sequence.
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from the main earthquake are estimated to have reached 2.4 m (7.9 ft), however, exact heights at the island from the main earthquake were not able to be measured because the earthquake destroyed the island's monitoring equipment. In
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said the first waves were due to reach New Zealand at around 9:49 am local time, with flooding expected along areas of the East and West Coasts of the North Island, and issued an evacuation order for areas of
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on August 12 of that year. This is unusual since earthquakes of magnitude 8 or higher occur only about once every year on average. There is no evidence of a causal relationship between the three events.
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estimated that the rupture zone was 175 by 75 km (109 by 47 mi) in area. The main shock was preceded by a magnitude 7.4 foreshock less than two hours prior, at 06:41:25 NZDT (17:41:25 UTC).
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While the tsunami heights were initially predicted to be 1–3 m (3.3–9.8 ft) high, tsunami heights measured by GeoNet ended up being around 0.35–0.40 m (1.1–1.3 ft) at
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About 6 hours before the main quake, at 02:27:36 NZDT on 5 March (13:27:36 UTC, 4 March) a magnitude 7.3 earthquake struck 100 km (60 mi) off
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of New Zealand, approximately 900 km to the south, several hours before the main quakes. More than a dozen aftershocks exceeded magnitude 6.
2313: 698: 676: 2168: 2104: 1475: 1460: 2278: 1882: 1049: 517:. The largest slide was at Pills Beach, where about 400 metres of coastal cliffs collapsed, leaving a column of sediment in the ocean. 1905: 641: 81: 2181: 1496: 289: 2099: 2062: 2014: 105: 1564: 1183: 1105: 1079: 900: 414: 2091: 2041: 1708: 386: 249: 2075: 1999: 1532: 1268:"Live: 'Try and stay calm' says emergency management minister, tsunami waves expected for 'several hours' after earthquake" 1020: 2057: 1819: 1558: 1538: 580:
and around 0.15–0.20 m (0.49–0.66 ft) at Great Barrier Island; 0.64 m (2.1 ft) waves were reported in
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occurred at 08:28:31 NZDT on 5 March 2021 (19:28:31 UTC, 4 March) along the subduction zone due to reverse faulting. The
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A magnitude 7.3 hit near New Zealand early on Thursday, occurred far enough apart that they likely were not related.
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M. J. Funnell, C. Peirce, W. R. Stratford, M. Paulatto, A. B. Watts, I. Grevemeyer (2014).
869:"GeoNet News: A morning of large offshore earthquakes - what happened and future scenarios" 573:. The tsunami land threat was dropped at 1:27 pm NZDT to a "Beach and Marine threat." 915: 1392: 868: 767:"M 8.1 Earthquake and Tsunami in Kermadec Islands, New Zealand on 04 Mar 2021 19:28 UTC" 524:. However there were no casualties as the island was uninhabited at the time due to the 581: 478: 2272: 562: 541: 394: 585: 549: 521: 514: 430: 374: 354: 320: 1418:"Kermadec Islands: Data on second quake lost due to monitoring equipment damage" 510: 1223: 373:. A separate, unrelated magnitude 7.3 earthquake occurred off the coast of the 1446: 604: 398: 370: 1874: 229: 216: 590: 577: 426: 366: 350: 436:
On July 28, 2021, nearly 5 months after the Kermadec Islands mainshock, an
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of New Zealand. Thousands of New Zealanders evacuated to higher ground.
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runs east of the Kermadec Islands and marks the boundary between the
1323:"Major 8.1 quake at Kermadecs, people told to move to higher ground" 365:. The main magnitude 8.1 earthquake was preceded by a magnitude 7.4 1242:"No one on Kermadec Islands during earthquakes and tsunami warning" 1447:
M8.1 Earthquake and Minor Tsunami Hits New Zealand - Mar. 5, 2021
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has had the most 8.0+ earthquakes in a single year since 2007.
473: 1050:"Earthquake cluster and tsunami alert: what you need to know" 397:. This convergent boundary is where the denser Pacific Plate 597:, a few boats were damaged and several people were injured. 2259:
indicates earthquake known to have resulted in fatalities
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Canterbury Earthquake Response and Recovery Act 2010
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indicates earthquake resulting in at least 30 deaths
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The tsunami heights at 204:28.9 km (18 mi) 196:43.0 km (27 mi) 37: 1539:West Sulawesi, Indonesia 657:2016 Kaikōura earthquake 446:8.1 magnitude earthquake 438:8.2 magnitude earthquake 1717:(7.5 & 8.1, Aug 12) 1565:Loyalty Islands, France 409:The main magnitude 8.1 130:March 5, 2021 2182:June 2011 Christchurch 1816:(6.0 & 6.3, Nov 6) 1715:South Sandwich Islands 1602:(7.4 & 8.1, Mar 4) 536:The main quake led to 450:South Sandwich Islands 2218:2021 Kermadec Islands 2100:August 1942 Wairarapa 2015:1888 North Canterbury 1960:1838 Waitotara Forest 1779:Balochistan, Pakistan 1559:Mindanao, Philippines 615:Earth sciences portal 411:megathrust earthquake 349:on 4 March 2021. The 1756:Melbourne, Australia 1623:East Java, Indonesia 571:Great Barrier Island 2289:2021 in New Zealand 2092:June 1942 Wairarapa 2042:1904 Cape Turnagain 1762:Arkalochori, Greece 1516:Earthquakes in 2021 1158:earthquake.usgs.gov 725:www.geoengineer.org 699:"Technical Summary" 677:"Technical Summary" 226: /  76:2021-03-04 19:28:31 68:2021-03-04 17:41:25 34: 2063:1929 Arthur's Pass 2058:1921 Kaweka Forest 2005:1868 Cape Farewell 1930:1600s Alpine Fault 1533:Khövsgöl, Mongolia 1476:authoritative data 1461:authoritative data 933:10.1093/gji/ggu330 629:New Zealand portal 489:. You can help by 230:29.735°S 177.282°W 2266: 2265: 2200:2016 Christchurch 2123:1986 Raoul Island 2118:1979 Invercargill 2010:1869 Christchurch 1940:1815 New Plymouth 1935:1717 Alpine Fault 1920:1100 Alpine Fault 1872: 1871: 1837:Flores, Indonesia 1686:Rasht, Tajikistan 1397:www.geonet.org.nz 1327:Radio New Zealand 873:www.geonet.org.nz 544:, as far away as 526:COVID-19 pandemic 507: 506: 335: 334: 303:Peak acceleration 235:-29.735; -177.282 16:(Redirected from 2321: 2294:Kermadec Islands 2284:2021 earthquakes 2227:Related articles 2159:2009 Dusky Sound 2076:1931 Hawke's Bay 2000:1863 Hawke's Bay 1984:1848 Marlborough 1913:Pre-colonisation 1899: 1892: 1885: 1876: 1744:Guerrero, Mexico 1571:Fukushima, Japan 1506: 1499: 1492: 1483: 1434: 1433: 1431: 1429: 1414: 1408: 1407: 1405: 1403: 1389: 1383: 1382: 1380: 1378: 1363: 1357: 1356: 1345: 1339: 1338: 1336: 1334: 1319: 1313: 1312: 1310: 1308: 1293: 1284: 1283: 1281: 1279: 1264: 1258: 1257: 1255: 1253: 1238: 1232: 1231: 1230:. 26 March 2021. 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Index

2021 Kermadec Islands earthquake
2021 Kermadec Islands earthquakes is located in Oceania
UTC
ISC
619918421
620360228
ANSS
ComCat
ComCat
NZDT
Mw
Mw
29°44′06″S 177°16′55″W / 29.735°S 177.282°W / -29.735; -177.282
Kermadec-Tonga subduction zone
Megathrust
MMI VIII (Severe)
g
Raoul Island
magnitudes
UTC
epicentres
Raoul Island
Kermadec Islands
New Zealand outlying islands
foreshock
aftershock
North Island
Kermadec-Tonga subduction zone
Australian
Pacific plates

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