Title | The Hooskanaden Landslide: historic and recent surge behavior of an active earthflow on the Oregon Coast |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | Alberti, S, Senogles, A, Kingen, K, Booth, A, Castro, P, DeKoekkoek, J, Glover-Cutter, K, Mohney, C, Olsen, M, Leshchinsky, B |
Journal | Landslides |
Date Published | Jan-06-2022 |
ISSN | 1612-510X |
Abstract | This paper presents an analysis of the Hooskanaden Landslide, an earthflow, which experienced a dramatic surge event beginning on February 24, 2019, closing US Highway 101 near mile point 343.5 for nearly 2 weeks. This ~ 1 km long surge event resulted in horizontal displacements of up to 45 m and uplift of 6 m at the toe located on a gravel beach adjacent to the Pacific Ocean. The Hooskanaden Landslide, likely active since the eighteenth century, exhibits regular activity with a recurrence interval of major surge events of approximately every 20 years, transitioning from slow to relatively rapid velocities. During the 2019 event, maximum displacement rates of approximately 60 cm/h were observed, slowly decreasing to 15 cm/h for a sustained period of approximately 2 weeks before the eventual return to baseline conditions (< 0.02 cm/h). |
URL | http://link.springer.com/10.1007/s10346-020-01466-8 |
DOI | 10.1007/s10346-020-01466-8 |