Earthquakes and sudden rocks falling from the sky in certain areas like edgeville have suddenly started occuring. Their reason for happening could be about the recent Clan Citadels announcement coming on the 26th July, similar to how the strange power pointed in the direction of Daemonheim. Heres a screenshot taken from the Runescape Wiki
The area's dropped with fallen rocks are:
Catherby
Castle Wars
Mobilising Armies
Daemonheim
Duel Arena
Port Phasmatys
Edgeville
Falador east bank
Grand Exchange
Lumbridge
Piscatoris