Take a meter of copper wire and wrapped around a round dielectric (plastic cap, for example), then the ends of wire are connected to microvoltmeter. When you change the magnetic field, the device displays a number other than zero. Accordingly, if somewhere in the forest unit will display +-0.1V then this place may be anomal.



Ingredients:
1. Tester (AC / DC) from China — 1;
2. Coil — 1;
3. Glue;
4. Battery AA «Duracel».