I lived in Monterey, Ca for a year. Fort Ord was just a mile or two East. The old fort had an artillery firing range. I would hear them firing, and shells exploding, now and again.
There is a range of sand dunes in back of the beach on the fort. During WW2 the beach was used as an aerial torpedo range, and the other side of the dunes was used as a firing range for small arms and who know what else.
When the fort closed, long after I left the area, I read that the various ranges would be off limits for decades. There is too much unexploded ordinance to even consider clearing it.
They blow stuff up around here frequently.
When you’re standing on the part of the ladder with the warning sign telling you not to stand on it and then you get the shock wave. Well, it gets your attention.