  Mini-EUSO is the first detector of the JEM-EUSO program deployed on the ISS.
It is a wide field of view telescope currently operating from a nadir-facing
UV-transparent window on the ISS. It is based on an array of MAPMTs working in
photon counting mode with a 2.5 $\mu$s time resolution. Among the different
scientific objectives it searches for light signals with time duration
compatible to those expected from Extensive Air Showers (EAS) generated by
EECRs interacting in the atmosphere. Although the energy threshold for cosmic
ray showers is above $E>10^{21}$ eV, due the constraints given by the size of
the UV-transparent window, the dedicated trigger logic has been capable of the
detection of other interesting classes of events, like elves and ground
flashers. An overview of the general performance of the trigger system is
provided, with a particular focus on the identification of classes of events
responsible for the triggers.
