The pressure wave was recorded around the globe seven times, on barometers. I am actively monitoring my digital pressure sensors on my home weather station and have seen the pressure waves from the Tonga blast go by 4 times and counting (2 in each direction). Hoping to see a 5th pass tonight here in Seattle at around 10:55pm. I wrote a little python script to predict the future passes based on the first two very obvious ones. Very fun.