My wife and I were in the guests of the father-in-law, he was a former military - a helicopter, further with his words.
In the early 90s he served on the Kuril Islands, the airfield with helicopters we had on a small island, several ships were constantly standing nearby. There were frequent earthquakes. After another strong blow near us, we received a message of a possible wave that could cover our airfield. The instructions from the chiefs were: "I don't know if this wave will happen or not, but as soon as you see that the ships are anchoring, lift all the helicopters into the air and hang over the airfield for how much fuel is enough." We sat in the airport all day, from the side of the moremans no movements, as if it cost. In the evening we went home, and met a group of sailors from one of the ships and in the meantime told them about instructions from the chiefs for laughter, which they replied to us - "our also did not know will the wave or not, so there was an order - as soon as you see that the helicopters in the air hanged, then raise the anchor."