https://www.theregister.co.uk/2019/12/13/van_allen_belts/

Scientists have discovered a dangerous hotspot in Earth’s Van Allen radiation belts that spews so-called “killer electrons” that can knacker satellites and spacecraft.

Our home world is surrounded by two donut-shaped Van Allen radiation belts teeming with electrically charged particles. The inner belt stretches from 400 to 6,000 miles above our planet’s surface, and the outer one ranges from 8,400 to 36,000 miles out.