WEPA40 RJTD 082028 TSUNAMI BULLETIN ISSUED BY JMA AT 2028Z 8 DEC ORIGIN TIME 1739Z 8 DEC PRELIMINARY EPICENTER LAT 10.7 S. LON 161.4 E. SOUTH PACIFIC OCEAN FOCAL DEPTH 30 KM MAG 7.8 NO SIGNIFICANT TSUNAMI IS EXPECTED IN COASTAL AREAS OF JAPAN NO FURTHER ACTION WILL BE TAKEN =