At around 7:50am this morning the world famous Arecibo radio telescope collapsed after a series of failures weakened its structural integrity over the last few months. It's possible that the final collapse was triggered by transient loads from a seismic event, and we expect to find out more in the coming hours. Based on photos of the destroyed structure I've tried to lay out a sequence of events that explains the distribution of wreckage.

Here some drone footage of the wreckage:
https://www.youtube.com/watch?v=GRHXCWr7xt0