Very strong M7.1 earthquake hits Kermadec Islands, New Zealand

kermadec islands m7.1 earthquake april 24 2023 f

A very strong earthquake registered by the USGS as M7.1 hit the Kermadec Islands region, New Zealand at 00:41 UTC on April 24, 2023. The agency is reporting a depth of 49 km (30 miles). EMCS is reporting M7.1 at a depth of 40 km (24.8 miles).

The epicenter was located 921.1 km (572.3 miles) NNE of Hicks Bay, Gisborne, New Zealand, and 1014.8 km (630.6 miles) SSW of Nuku‘alofa, Tongatapu, Tonga.

The USGS issued a Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Overall, the population in this region resides in structures that are highly resistant to earthquake shaking, though some vulnerable structures exist. The predominant vulnerable building types are reinforced masonry and unreinforced brick with timber floor construction.

Small tsunami waves were registered at Raoul Island:

                  GAUGE      TIME OF   MAXIMUM     WAVE
                         COORDINATES   MEASURE   TSUNAMI   PERIOD
    GAUGE LOCATION        LAT   LON     (UTC)     HEIGHT    (MIN)
    RAOUL IS BOAT COVE   29.3S 177.9W    0054   0.09M/ 0.3FT  06
    FISHING ROCK RAOUL   29.3S 177.9W    0057   0.11M/ 0.4FT  06

The quake was preceded by M4.9 at 16:24 UTC and M5.0 at 16:51 UTC on April 23, and followed by M5.4 at 01:05 UTC, M5.3 at 01:51 UTC, and M4.9 at 07:28 UTC.

kermadec islands m7.1 earthquake april 24 2023 bg
Image credit: TW/SAM, Google
kermadec islands m7.1 earthquake april 24 2023 bgz
Image credit: TW/SAM, Google

Regional seismicity

kermadec islands m7.1 earthquake april 24 2023 emsc rs

Featured image credit: TW/SAM, Google


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