500 feet? Try 500 meters (1640 feet)!
The wave that was generated by the Good Friday Earthquake in Alaska (9.5 on the new scale) generated a wave about 80 feet high. The dead trees are still standing about a mile and a half inland from where it came ashore. It wiped out most of the town of Valdez (now called "Old Town,") and lifted a freighter (the "Chena") well up above the level of the dock, shifting her freight (logs and pipe) and severing the legs of at least one longshoreman. A couple others were killed.
The stories from Valdez seldom get told because the ones from Anchorage are on record with movies. But Valdez suffered so much damage the entire town was moved to a new site 5 miles away. Several Native villages were wiped out. The death toll from that quake was 111. I don't think any of the bodies were ever recovered. An 80-foot tsunami is bad enough. I shudder to even try to imagine a wave 500 feet high, although "Deep Impact" came to mind here, also...