Arrange the pork chops in a large shallow dish. Season each pork chop, on both sides, with salt, black pepper, garlic powder, cayenne pepper and celery seeds. Pour the buttermilk over the chops and turn to coat.
Place flour into a large shallow dish. Dip each pork chop into the flour mixture and coat well, shaking off the excess.
Using tongs, gently lower the chops into the deep skillet in batches if necessary. Fry for 8 to 10 minutes or until golden brown, turning once. Transfer chops to a paper towel-lined pate to drain. Serve hot.