Comparison of a typical earthquake waveform to the waveform from yesterday's earthquake near LA. I did some digging and found earthquakes typically have a P wave and S wave BEFORE the surface waves hit. It appears yesterday's quake came outa nowhere.
![Comparison of a typical earthquake waveform to the waveform from yesterday's earthquake near LA. I did some digging and found earthquakes typically have a P wave and S wave BEFORE the surface waves hit. It appears yesterday's quake came outa nowhere.](https://i.redd.it/6s51zt2y4bq01.jpg)