In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Gyro-resonant wave particle interactions that occur in these regions can accelerate electrons to ultrarelativistic energies and temporary artificial ones composed of electrons produced from the decay of fission fragments were created by the Argus and Starfish Prime nuclear tests. Contained within the Chapman-Ferraro cavity, one of these entities imparts high energy proton and electrons to the South Atlantic Anomaly. They are primarily generated through neutron albedo and are composed of an inner zone containing protons and an outer plasma zone which generates a ring current responsible for magnetic storms. For 10 points, what are these regions of geomagnetically trapped particles first discovered by Geiger counters on Explorer 1 and 3.
Science