Here's a chart recorded on my bench (noisy environment) overnight (9 hours). Chart is for the 28th Aug, time is in UTC. Red Line: Y = Closest Magnetometer I can find (82 miles away), data rate is 1Hz (this is the reference). Blue Line: "Aurora Observatory" is my coil magnetometer, data rate is 1Hz and I've applied at 60 Moving Average just to smooth the data similarly to the reference I'm using.

A few things, Aurora Observatory was roughly aligned to Magnetic East/West. The reference is "Y" so it's aligned to Geographic East, for my location that's about 14 degrees difference. I'm located closer to the Auroral Activity than the reference location, and the auroral activity around that time was present for my location.

Peaks / Valleys consistently match, i.e. it's working well: