Four spacecrafts launched in 2015 called the Magnetospheric Multiscale are on a mission to study magnetic explosions in our planet’s magnetosphere. When Earth’s magnetic field lines criss-cross and reconnect there is a bang and magnetic energy is unleashed. The process is called “magnetic reconnection, and it serves as a power source for geomagnetic storms. These four crafts use GPS to coordinate at an altitude previously thought not possible.
via Space Weather Probes Shatter GPS Record | Spaceweather.com.