000 SEUS56 KEKA 201637 TMAEKA TSUNAMI TIDE/SEISMIC MESSAGE ACKNOWLEDGMENT NATIONAL WEATHER SERVICE EUREKA 935 AM PDT MON MAY 20 2013 A. TSUAK1 RCVD 20130520 @ 1633 UTC B. NWS EUREKA CA C. ROBERT.RUEHL@NOAA.GOV D. 707-443-6484 $$