If you hear rumblings from northern Lebanon County later this month, worry not—it’s probably just the Gap.

Fort Indiantown Gap will once again be conducting training activities this month on August 9-11 and August 20-22.

Fort Indiantown Gap is the only live-fire, maneuver military facility in Pennsylvania, and the training ground will be active later this month.

Mortar training will be held August 9-11 and artillery training will be held August 20-22. Trainings will occur between 8am and 11pm.

Here’s video from last year’s exercises.