Like most of them. Seems like an explosion more than an earthquake.
Winner, winner, chicken dinner?
Kek!
Has been obvious to me for over a year. Pretty sure many other anons too. Earthquakes have aftershocks, and their waveforms aren't remotely close to the nice sudden flat line right after the event.
Surface:
https://earthquake.alaska.edu/event/0194500x82/waveforms
23k:
https://earthquake.alaska.edu/event/01941legpt/waveforms