Originally Posted by
ApolloHeli
My guess is a big rock coming down. It's not only ash that gets thrown upwards during an eruption....
Would bet on the wind generated from the blast, and not falling rocks. The machine has moved off the platform (aft it seems) and I can only imagine the amount of flapping those blades would do being exposed to such wind force. The blades does not seem to have any other damage than them being snapped.