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Its headscarp, the uppermost boundary of a landslide or rockfall, sat roughly 1,025 meters above sea level.—Jacek Krywko, ArsTechnica, 10 May 2026 Authorities raised the five-step alert around Mayon to level 3 in January after a series of mild eruptions that caused intermittent rockfalls, some as big as cars, from its peak crater along with deadly pyroclastic flows.—ABC News, 4 May 2026 Travelers previously descended into the canyon along steep switchback roads prone to rockfalls or took long detours around the gorge, routes that added more than an hour to travel time.—Aman Kumar, Encyclopedia Britannica, 8 Apr. 2026 Erosion is a persistent concern on Tristan, where rockfalls and landslides are common.—NPR, 4 Apr. 2026 See All Example Sentences for rockfall