text:  when the Cook Inlet was extremely low tide. The tide varied 35 feet, and it was at the time of day when it was extremely low, and that differential stress probably helped to trigger that quake. It would have happened anyway in a few days or weeks, but the actual extreme tides helped to pick that day. And on that day at Seward, I had a call from a lady who said, stick with what you're doing. I was in Seward.