Hello,
I had the same issue (for the first time) in PW#2650
A new Terminal was constructed by my airline at Miami International Airport with 13 gates. Suddenly these were down to 3 gates, with an occupancy rate of around 457%. Miami is not generally in an earthquake hazard zone....
I have since had the terminals reconstructed, and will let you know if ever the issue becomes recurrent.
Best regards,
Thunderstruck.