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Avalanche statistics of driven granular slides in a miniature mound

2008; American Geophysical Union; Volume: 35; Issue: 19 Linguagem: Inglês

10.1029/2008gl035567

1944-8007

Dranreb Earl Juanico, Anthony Longjas, Rene C. Batac, Christopher Monterola,

Tree Root and Stability Studies

We examine avalanche statistics of rain‐ and vibration‐driven granular slides in miniature sand mounds. A crossover from power‐law to non power‐law avalanche‐size statistics is demonstrated as a generic driving rate ν is increased. For slowly‐driven mounds, the tail of the avalanche‐size distribution is a power‐law with exponent −1.97 ± 0.31, reasonably close to a value previously reported for landslide volumes. The interevent occurrence times are also analyzed for slowly‐driven mounds; its distribution exhibits a power‐law with exponent −2.670 ± 0.001.