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Landslide processes in saprolitic soils of a tropical rain forest, Puerto Rico

Shallow soil slips, earth and debris slides appear to be a primary mechanism of hillslope denudation in the rainforest of eastern Puerto Rico. Annual rainfall in excess of 4,000 mm, and thick sequences (up to 20 m) of residual soils (saprolite) combine to produce these landslides. Shear strength testing and observatons of tension cracks indicate that landslides may start as tensile failure of sapr
Authors
Matthew C. Larsen, Andrew Simon

Rainfall-soil moisture relations in landslide-prone areas of a tropical rain forest, Puerto Rico

Soil moisture conditions are not well documented in steep, tropical landslide-prone terrain. In the 11,330 ha Caribbean National Forest (CNF) in northeastern Puerto Rico more than 170 landslides that occurred from one to approximately 60 years ago have been mapped. Most of these landslides are shallow, with failure depths of 0.5 ot 7 m, and are associated with periods of intense, prolonged rainfal
Authors
Matthew C. Larsen, Angel J. Torres-Sanchez

A suggested method for reporting a landslide

The Landslide Report is a Suggested Method developed by the International Geotechnical Societies' UNESCO Working Party on World Landslide Inventory for reporting the position, date, type, geometry, volume and damage of significant landslides.
Authors
Robin Fell, W. Lacerda, D.M. Cruden, S.G. Evans, P. LaRochelle, Fernando Martinez, Lisandro Beltran, J. Jesenak, S. Novograd, E. Krauter, E. Slunga, G.A. Pilot, E.W. Brand, J. Farkas, R.K. Bhandari, V. Cotecchia, Franco Esu, H. Fujita, H. Nakamura, K. Sassa, W.H. Ting, Graham Salt, Nilmar Janbu, A.M. Nespak, Wang Gongxian, Zhang Zhuoyuan, R. Michelena, Mihai Popescu, Leif Viberg, C. Bonnard, J.N. Hutchinson, H.H. Einstein, R. L. Schuster, D. J. Varnes, Z.G. Ter-Martiros­ian, G.I. Ter-Stepanian, P. Anagnosti, M. Hashizume, Masayuki Watanabe

Suggested nomenclature for landslides

The IAEG Commission on Landslides and other Mass Movements on Slopes has proposed English and French names for 19 identifiable features of slope movements and for 7 dimensions of those features. The Commission intends to publish this list in other languages and to supplement and revise it from time to time.
Authors
D.M. Cruden, S. Novograd, G.A. Pilot, E. Krauter, R.K. Bhandari, V. Cotecchia, H. Nakamura, C.O. Okagbue, Zhang Zhuoyuan, J.N. Hutchinson, D. J. Varnes, G.I. Ter-Stepanian

Cincinnati landslide database

No abstract available.
Authors
R.L. Berknopf, R. H. Campbell, D.S. Brookshire, C.D. Shapiro

A numerical study of some potential sources of error in side-by-side seismometer evaluations

This report presents the results of a series of computer simulations of potential errors in test data, which might be obtained when conducting side-by-side comparisons of seismometers. These results can be used as guides in estimating potential sources and magnitudes of errors one might expect when analyzing real test data. First, the derivation of a direct method for calculating the noise levels
Authors
L. Gary Holcomb

The San Andreas Fault System, California

Maps of northern and southern California printed on flyleaf inside front cover and on adjacent pages show faults that have had displacement within the past 2 million years. Those that have had displacement within historical time are shown in red. Bands of red tint emphasize zones of historical displacement; bands of orange tint emphasize major faults that have had Quaternary displacement before hi

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: December 1990

No abstract available.
Authors
John B. Townshend, Richard V. O'Connell, Carol Ann Varner