Crash detection is based on the force measured by the accelerometer whenever the speed of a vehicle drastically changes.
Our devices are currently configured to considering a crash when the force measured by the accelerometer is at least 4000 mG and this force lasts for at least 20 milliseconds.
This means that a very strong breaking might also be considered as a crash as well as a strong impact like hitting some roadside rails.
See how to set up alerts about such events in the below article.
Set vehicle event alerts (geofence, maintenance, crash,...)
Set up rules to get alerts about vehicle events
