Earth's magnetic field is caused by movements in its core. Its outer core is roughly 2,890,000 meters below Earth's surface. Therefore, to directly interfere with Earth's magnetic field, ...
posted 10y ago by HDE 226868 · last activity 10y ago by HDE 226868
Source: https://worldbuilding.stackexchange.com/a/7194 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/