I've seen that pic before so thought I could find it again. While I believed it wasn't a major storm event (water too calm, lot of people bunched together and more curiosity than panic) I still searched for "surfing tsunami" and sure enough it was mis-labelled that in a few places. That then led me to a Snopes discussion page with the answer:
http://msgboard.snopes.com/cgi-bin/u...9;t=000828;p=0