Yeah, that's the ticket, it was a 656 foot wave. Pay no mind that 656 adds up to 17, that's just a coinkydink.

Anyway, it sloshed back and forth for 9 days, that's the ticket…

https://www.forbes.com/sites/carlymiller/2024/09/23/656-foot-megatsunami-leaves-25-foot-waves-reverberating-in-greenland-fjord-for-9-days/