EDIT #2: This thread is the de facto repository of the ongoing efforts of the Rook Alerts group to keep track and predict the Rook attacks plaguing Aranna in particular and Rook attacks in general.
EDIT #1: Google Spreadsheet courtesy of Garum. Please update both the thread and the spreadsheet.
I have been keeping track of Rook attacks in Aranna especially those I participated in. So far my guesstimates have been holding true; the. rook attacks are approximately 2 real-time hours apart ± 10 minutes.
NOTE: This applies to Rook attacks in Aranna
— Mal'akh, Primate of Lem, Primus Inter Pares of the Orthodox Church of the Giants of Ur, Hubby of Aranna, Shriner of Mullangi Meda