WEPA40 RJTD 180105 TSUNAMI BULLETIN ISSUED BY JMA AT 0105Z 18 JUL ORIGIN TIME 2334Z 17 JUL PRELIMINARY EPICENTER LAT 54.5 N. LON 168.9 E. ALEUTIAN ISLANDS FOCAL DEPTH /// KM MAG 7.8 NO SIGNIFICANT TSUNAMI IS EXPECTED IN COASTAL AREAS OF JAPAN NO FURTHER ACTION WILL BE TAKEN =