I may be wrong but i am pretty sure the accelerometer only mesures G forces and so yeah with a descent amoutn of math you probalby even make it output in the richter scale. For the actual graph part you coud use graphy but that is for pros for VexCode I couldnt find anityhing aside from this. I am not entirly sure but i think you could just get the IMU’s dating and output it on the screen and then just multiply the valvues by something until you see an acutaly noticible change on the screen or in the numbers. That being said the vex IMU are decently noisy and You may have to some wierd signall processing stuff with two IMU’s to remove the noise. You also could physically amplify the signal by putting it onto some kind of floppy pole. Good luck on your project