Other natural causes include rain, earthquakes, rockfall and icefall. A macroscopic section can be used for dating of avalanche and rockfall events. Piles of talus and rockfall were created by retreating alpine glaciers. The earthquake caused a subaerial rockfall in the Gilbert Inlet. On September 18, 2014, PHIVOLCS reported 142 VT earthquake events and 251 rockfall events. The explosion kills many attackers but also causes a rockfall, killing Bamforth. A major rockfall caused by heavy rains on 31 March injured five people. They follow a steep cliffway, when they are hit by a rockfall caused by Charlie. A cliff that has favorable geology to a rockfall may be said to be incompetent. Its reopening was subsequently prevented by a rockfall. Rock bolts can also be used to prevent rockfall. This route was destroyed by the 2005 rockfall. It has been closed since the rockfall that occurred on Mother's Day in 1999. Anoling, Daraga and rockfall events were intermittently recorded. Fortunately this unexpected rockfall did not claim any lives.