M7.7 near Loyalty Islands - 19 May 2023

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Nev
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M7.7 near Loyalty Islands - 19 May 2023

Unread post by Nev »

M7.7 at 38 km deep - SE of the Loyalty Islands, New Caledonia at 2:57pm today NZST.

https://earthquake.usgs.gov/earthquakes ... /executive

Possible Tsunami threat:

Code: Select all

TSUNAMI MESSAGE NUMBER 3
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
0340 UTC FRI MAY 19 2023
...
 
TSUNAMI THREAT FORECAST
-----------------------

  * TSUNAMI WAVES REACHING 1 TO 3 METERS ABOVE THE TIDE LEVEL ARE
    POSSIBLE ALONG SOME COASTS OF

      VANUATU.

  * TSUNAMI WAVES REACHING 0.3 TO 1 METERS ABOVE THE TIDE LEVEL
    ARE POSSIBLE FOR SOME COASTS OF

      NEW CALEDONIA... FIJI... KIRIBATI... AND NEW ZEALAND.
...

ESTIMATED TIMES OF ARRIVAL
--------------------------

  * ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
    FOR PLACES WITHIN THREATENED REGIONS ARE GIVEN BELOW. ACTUAL
    ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
    LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
    WAVES CAN BE FIVE MINUTES TO ONE HOUR.

    LOCATION         REGION             COORDINATES    ETA(UTC)
    ------------------------------------------------------------
    ANATOM ISLAND    VANUATU           20.2S 169.9E   0331 05/19
    ESPERITU SANTO   VANUATU           15.1S 167.3E   0431 05/19
    SUVA             FIJI              18.1S 178.4E   0431 05/19
    NORTH CAPE       NEW ZEALAND       34.4S 173.3E   0500 05/19
    LOTTIN POINT     NEW ZEALAND       37.5S 178.2E   0540 05/19
    AUCKLAND WEST    NEW ZEALAND       37.1S 174.2E   0600 05/19
    WHANGAREI        NEW ZEALAND       35.8S 174.5E   0602 05/19
    MOUNT MAUNGANUI  NEW ZEALAND       37.6S 176.2E   0603 05/19
    PORT TAURANGA    NEW ZEALAND       37.7S 176.2E   0616 05/19
    AUCKLAND EAST    NEW ZEALAND       36.7S 175.0E   0642 05/19
    NEW PLYMOUTH     NEW ZEALAND       39.1S 174.1E   0645 05/19
    TARAWA ISLAND    KIRIBATI           1.5N 173.0E   0725 05/19
    WANGANUI         NEW ZEALAND       39.9S 175.0E   0832 05/19
Update: Tsunami threat to NZ cancelled.
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Nev
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Posts: 6331
Joined: Tue 07/03/2006 15:24
Location: Waiheke Island, Hauraki Gulf

Re: M7.7 near Loyalty Islands - 19 May 2023

Unread post by Nev »

Couple more notable aftershocks today include an M7.1 at 36 km deep at 1:51pm, followed 19 minutes later by an M6.5 at 10 km deep.

https://earthquake.usgs.gov/earthquakes ... /executive
https://earthquake.usgs.gov/earthquakes ... /executive