WEPA40 RJTD 200808 TSUNAMI BULLETIN ISSUED BY JMA AT 0808Z 20 APR ORIGIN TIME 0752Z 20 APR PRELIMINARY EPICENTER LAT 39.8 N. LON 143.2 E. E OFF NORTHERN HONSHU FOCAL DEPTH 10 KM MAG 7.5 TSUNAMI WARNINGS ARE IN EFFECT FOR THE FOLLOWING COASTAL AREAS OF JAPAN: PACIFIC COASTS OF NORTH JAPAN TSUNAMI ADVISORIES ARE IN EFFECT FOR THE FOLLOWING COASTAL AREAS OF JAPAN: WESTERN COASTS OF NORTH JAPAN =