Makes sense though, doesn’t it? Faults activity and earthquakes are all about relieving pressures. If an adjacent fault gives in to some pressures are on it, then more pressure moves to it’s neighboring faults. On the larger scales, the plates have a small degree of elasticity to them. Combine that with frictions at the fault points, and what you have are endless series of various faults moving and elastically putting more pressure on other faults that haven’t moved.
Combine that with frictions at the fault points, and what you have are endless series of various faults moving and elastically putting more pressure on other faults that haven’t moved.