Journal article
The 1960 tsunami on beach-ridge plains near maullín, chile: Landward descent, renewed breaches, aggraded fans, multiple predecessors
BF Atwater, M Cisternas, E Yulianto, AL Prendergast, K Jankaew, AA Eipert, WI Starin Fernando, I Tejakusuma, I Schiappacasse, Y Sawai
Andean Geology | SERVICIO NACIONAL GEOLOGIA MINERVA | Published : 2013
Abstract
The Chilean tsunami of 22 May 1960 reamed out a breach and built up a fan as it flowed across a sparsely inhabited beach-ridge plain near Maullín, midway along the length of the tsunami source. Eyewitnesses to the flooding, interviewed mainly in 1988 and 1989, identified levels that the tsunami had reached on high ground, trees, and buildings. The maximum levels fell, from about 10 m to 2 m, between the mouth of the tidal Río Maullín and an inundation limit nearly 5 km inland across the plain. Along this profile at Caulle, where the maximum flow depth was a few meters deep, airphotos taken in 1961 show breaches across a road on a sandy beach ridge. Inland from one of these breaches is a fan ..
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Awarded by Fondecyt
Funding Acknowledgements
J. Ulloa, H. Jimenez Nunez, M.A. Reinhart, and J. Cuevas contributed to the reconnaissance in 1988-1989, which was part of USGS Gilbert Fellowship project with A. Nelson and S. Bartsch-Winkler. The field work in 2006 was supported in part by the United States Agency for International Development (for an Indian Ocean paleotsunami project led by B. Atwater), Geoscience Australia (A. Prendergast), the United States Geological Survey (B. Atwater), and Japan's Active Fault Research Center (Y. Sawai). The work was also made possible by Fondecyt grants 1060227 and 1110848 (to M. Cisternas). M. Lagos contributed GPS data on pit locations in Chanhue. R. Vergara cooked for the 2006 group in a home rented to us by B. Bohle. J. Bourgeois pointed out analogies with washover fans and crevasse splays. Initial versions of the manuscript were reviewed by D. Clark, B. Jaffe, B. MacInnes, U. Glawe, F. Nanayama, C. Peterson, and C.P. Rajendran, and a later version by R. Witter, J. Goff, S. Fujino, and C. Weaver.