Αποτελέσματα Αναζήτησης
10 Μαΐ 2022 · Lahars cannot be predicted, but they can be detected. The Traveler published an April 2022 article reporting National Park Service approval of a proposal from the USGS’ Cascades Volcano Observatory to improve the lahar detection system at Mount Rainier National Park.
11 Σεπ 2009 · Mt. Ruapehu, in the central North Island of New Zealand, is one of the most lahar-prone volcanoes in the world. Since historic observations began in 1861 AD, more than 50 individual lahars have been recorded in the Whangaehu valley alone, the natural outlet to the summit Crater Lake.
3 Νοε 2023 · National Lahar. Late in Summerland time, the explosive eruption that generated the C tephra 2,200-2,300 years ago also triggered lahars at the heads of several drainages (White, Cowlitz, and Nisqually), including one named the National Lahar, which moved for at least 100 km (62 mi) down the Nisqually River valley.
1 Ιαν 2000 · Lahars occurred on May 18, 1980, on nearly all streams draining the cone of Mount St. Helens and were formed in three major ways: 1) the most voluminous lahar originated by slumping and...
1 Ιαν 2015 · Clay-rich, collapse-induced lahars appear to be more common at ice-clad volcanoes than at volcanoes that are free of ice. Glacial erosion tends to expose deeper, potentially more-altered portions of volcanoes, while incised slopes in altered rock are susceptible to failure not only because the rock is weak but also because they are oversteepened.
6 Νοε 2014 · Lahars are rapid flows of mud–rock slurries that can occur without warning and catastrophically impact areas more than 100 km downstream of source volcanoes.
Lahars are mixtures of water, volcanic ash, tephra, rock fragments, and chunks of ice that can flow like wet concrete. The term comes from the Indonesian word for these destructive mudflows that cause both property damage and loss of life. They can occur with little to no warning.
