Ah, guess who makes the rules about how close you may be to an active volcano? It's usually the corresponding observatory, and they are valid for the public, no

Ah, guess who makes the rules about how close you may be to an active volcano? It's usually the corresponding observatory, and they are valid for the public, not for the scientists. And then, safe just means nobody gets hurt. The volcano will eat some instrumentation anyway at some point, probably. They often do. Plus, the sulfuric acid plume emissions will damage your gear if you get caught in it.