Discovered this neat project to pull detailed magnetometer data from iOS: https://github.com/foundry/MagnetoMeter
I've been looking at different approaches to setting up a 24/7 magnetometer to monitor solar activity. One option was to set up an old iPhone 6 and beam the data over wifi to a server. However, I'm unfamiliar with the iPhone's hardware and sensitivity.
Is the built-in magnetometer going to be sensitive enough to detect solar storms?