The details are messier because groundwater flow very much does affect earthquakes (poroelasticity), but by and large, seasons don't affect groundwater flow significantly at the depths involved. E.g. wet vs dry weather doesn't matter. But on the other hand, a lake filling up or draining can, especially in terms of triggering very small earthquakes.
The details are messier because groundwater flow very much does affect earthquakes (poroelasticity), but by and large, seasons don't affect groundwater flow significantly at the depths involved. E.g. wet vs dry weather doesn't matter. But on the other hand, a lake filling up or draining can, especially in terms of triggering very small earthquakes.