You can look at lightning in an SDR receiver, they look like horizontally oriented stretched droplets. Somewhere around 7kHz iirc.

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Catbert59 3 days ago | parent [-]

I tried to detect lightning with a Bosch Sensortec COTS magnetometer - but failed.

Was a fun experiment: https://www.dm5tt.de/2025/07/26/thunderstorm-detector-with-m...

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CheeseFromLidl 3 days ago | parent [-]

I’d like to ask to repeat this experiment but with a ferrite core next to the sensor (touching it). On the low spectrum (below a few MHz?) the magnetic component in the electromagnetic wave becomes dominant. Which is why receivers in shortwave radio and in e.g. DCF77 use a ferrite antenna. The ferrite’s length should be perpendicular to the line formed by the sensor and the location of the storm.

Edit: you’re reading at 400 Hz so you’ll read phenomena below 200 Hz

	▲	Catbert59 3 days ago \| parent [-]
		Will do. The experiment isn't yet dismantled. Going to write the ferrite core on my next shopping list.