I think this is the reason for the sound of fighter jets

(1)Air Force 20th Fighter Wing
(2)We ask for a broad understanding of citizens who are expected to fly from late night to early morning on weekdays and weekends due to an emergency dispatch for military preparedness related to the North Korean situation
(3)Flight Date 2022 Episode 1101 ~ Flight time emergency dispatch 24 hours until the end of military readiness
(4)※ For more information, please call 041-688-9800
(5)Please contact Civil Service Officer, 20th Fighter Wing, Air Force