There were two big earthquakes if you have a weather app that showed storms and earthquakes hurricanes other national disasters I use my local weather station app but it shows earthquakes one 7.3 the other 7.2 just 1 hr ago they had 5.6 and 5.3 5.2 tons plus you can go look on the earthquake sites they have had I think it said 76 earthquakes since the first one 7.2 then 10min later 7.3 and they just keep coming just that area of the ocean is full of underwater volcanos. Idk how they didn’t have one unless it was all the other earthquakes that stopped the tsunami which is possible or the water receded due to earthquakes splitting the ocean floor and water drained into it two massive quakes could have created massive cracks thus receding water.