It seems like there is a larger amount of Black Bear attacks lately. Not surprising when we as humans keep moving deeper into there territories,, it's not there fault, there basically opportunists and will eat most anything, and we leave lots of stuff around that's easy picking for a bear. There just naturally guarding there larder.
You know what I always found to be the most effective to scare them away,,,every single time?? A string of small firecrackers,,,it scares the "Billy Jesus" out of them, a couple times of that you won't have to worry about that particular bear coming around again anytime soon! I used those allot at the camp grounds, parking lots and on the AT around shelters while I worked with the Forest Service, it works every time. They were in my pack all the time.