Magnetospheric sawtooth events are periodic, substorm-like energetic particle injections that appear to initiate across the night sector from dusk to dawn almost simultaneously. The origin of the periodicity or the broad extent of the injections is still being debated, and there is no agreement whether they form a class of substorms or are a phenomenon that features physical processes that are different from those driving magnetospheric substorms. This research is carried out by Connor DiMarco, in collaboration with Mike Henderson from the Los Alamos National Laboratory.
