ZCZC WEPA40 PHEB 190620 TSUPAC TSUNAMI MESSAGE NUMBER 7 NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI 0620 UTC FRI MAY 19 2023 ...PTWC FINAL TSUNAMI THREAT MESSAGE... **** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE ***** THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM. NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED INFORMATION. **** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE ***** THE TSUNAMI FORECAST IS UNCHANGED IN THIS MESSAGE. PRELIMINARY EARTHQUAKE PARAMETERS --------------------------------- * MAGNITUDE 7.7 * ORIGIN TIME 0257 UTC MAY 19 2023 * COORDINATES 23.2 SOUTH 170.7 EAST * DEPTH 10 KM / 6 MILES * LOCATION SOUTHEAST OF LOYALTY ISLANDS EVALUATION ---------- * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.7 OCCURRED SOUTHEAST OF THE LOYALTY ISLANDS AT 0257 UTC ON FRIDAY MAY 19 2023. * BASED ON ALL AVAILABLE DATA... THE TSUNAMI THREAT FROM THIS EARTHQUAKE HAS NOW PASSED. TSUNAMI THREAT FORECAST...UPDATED --------------------------------- * THE TSUNAMI THREAT HAS NOW LARGELY PASSED. RECOMMENDED ACTIONS ------------------- * GOVERNMENT AGENCIES RESPONSIBLE FOR ANY IMPACTED COASTAL AREAS SHOULD MONITOR CONDITIONS AT THE COAST TO DETERMINE IF AND WHEN IT IS SAFE TO RESUME NORMAL ACTIVITIES. * PERSONS LOCATED NEAR IMPACTED COASTAL AREAS SHOULD STAY ALERT FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM LOCAL AUTHORITIES. * REMAIN OBSERVANT AND EXERCISE NORMAL CAUTION NEAR THE SEA. POTENTIAL IMPACTS ----------------- * MINOR SEA LEVEL FLUCTUATIONS OF UP TO 0.3 METERS ABOVE AND BELOW THE NORMAL TIDE MAY CONTINUE OVER THE NEXT FEW HOURS. TSUNAMI OBSERVATIONS -------------------- * THE FOLLOWING ARE TSUNAMI WAVE OBSERVATIONS FROM COASTAL AND/OR DEEP-OCEAN SEA LEVEL GAUGES AT THE INDICATED LOCATIONS. THE MAXIMUM TSUNAMI HEIGHT IS MEASURED WITH RESPECT TO THE NORMAL TIDE LEVEL. GAUGE TIME OF MAXIMUM WAVE COORDINATES MEASURE TSUNAMI PERIOD GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN) ------------------------------------------------------------- LENAKEL VU 19.5S 169.3E 0511 0.61M/ 2.0FT 04 EAST CAPE NZ 37.6S 178.2E 0544 0.11M/ 0.4FT 08 FISHING ROCK RAOUL 29.3S 177.9W 0535 0.15M/ 0.5FT 04 RAOUL IS BOAT COVE 29.3S 177.9W 0523 0.07M/ 0.2FT 06 NORTH CAPE NZ 34.4S 173.0E 0532 0.21M/ 0.7FT 06 HIENGHENE NEW CALED 20.7S 164.9E 0454 0.03M/ 0.1FT 20 THIO NEW CALEDONIA 21.6S 166.2E 0409 0.07M/ 0.2FT 20 MARE NEW CALEDONIA 21.5S 167.9E 0413 0.19M/ 0.6FT 06 OUINNE NEW CALEDONI 22.0S 166.7E 0406 0.20M/ 0.7FT 08 LIFOU NEW CALEDONIA 20.9S 167.3E 0400 0.12M/ 0.4FT 06 NEXT UPDATE AND ADDITIONAL INFORMATION -------------------------------------- * THIS WILL BE THE FINAL STATEMENT ISSUED FOR THIS EVENT UNLESS NEW INFORMATION IS RECEIVED OR THE SITUATION CHANGES. * AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S. GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT EARTHQUAKE.USGS.GOV. * FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT WWW.TSUNAMI.GOV. * COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT WWW.TSUNAMI.GOV. * COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON... BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S. NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND AT WWW.TSUNAMI.GOV. $$ NNNN