UPDATE 1 December 9AM: The structure did not survive the night. https://www.sciencemag.org/news/2020/12/arecibo-telescope-collapses-ending-57-year-run 

The radiotelescope at Arecibo Observatory will be shut down and dismantled, the National Science Foundation determined this month. Arecibo has contributed to astronomical research ranging from the planetary to the extragalactic scale for over 50 years. Recent damage from storms and aging appears unrepairable, and NSF now plans for its careful disassembly for safety reasons.

Read more:

•  Physics Today https://physicstoday.scitation.org/do/10.1063/PT.6.2.20201124a/full/
•  Arecibo Observatory home page http://www.naic.edu/
•  NSF Press Release https://www.nsf.gov/news/news_summ.jsp?cntn_id=301674
• Follow updates at the International Asteroid Warning Network http://iawn.astro.umd.edu/