And lodestones
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi7e41mz9ntPB9Th_4szKgX-vSFhqKpunms10AqQ7kTVqfizprsAnM-YDAxmnfmefks6tSrpxixZEfy-_zKSxihu7gRrRVJxTqdu9ghMfNIkM221g-GkkKLde9FzCFRR_1_cImxZIujpFyp/s280/global+lightning.png)
An interesting distribution.
From the source Wikipedia page:
The intense currents of a lightning discharge create a fleeting but very strong magnetic field. Where the lightning current path passes through rock, soil, or metal these materials can become permanently magnetized. This effect is known as lightning-induced remanent magnetism, or LIRM. These currents follow the least resistive path, often horizontally near the surface but sometimes vertically, where faults, ore bodies, or ground water offers a less resistive path. One theory suggests that lodestones, natural magnets encountered in ancient times, were created in this manner.
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