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Are migrating raptors guided by a geomagnetic compass? Are migrating raptors guided by a geomagnetic compass?

We tested whether routes of raptors migrating over areas with homogeneous topography follow constant geomagnetic courses more or less closely than constant geographical courses. We analysed the routes taken over land of 45 individual raptors tracked by satellite-based radiotelemetry: 25 peregrine falcons, Falco peregrinus, on autumn migration between North and South America, and seven...
Authors
Kasper Thorup, Mark R. Fuller, T. Alerstam, M. Hake, N. Kjellen, R. Standberg

Southern California — Wildfires and debris flows Southern California — Wildfires and debris flows

Wildland fires are inevitable in the western United States. Expansion of man-made developments into fire-prone wildlands has created situations where wildfires can destroy lives and property, as can the flooding and debris flows that are common in the aftermath of the fires. Fast-moving, highly destructive debris flows triggered by intense rainfall are one of the most dangerous post-fire...
Authors
Water Resources Division U.S. Geological Survey

Southern California landslides-an overview Southern California landslides-an overview

Southern California lies astride a major tectonic plate boundary defined by the San Andreas Fault and numerous related faults that are spread across a broad region. This dynamic tectonic environment has created a spectacular landscape of rugged mountains and steep-walled valleys that compose much of the region’s scenic beauty. Unfortunately, this extraordinary landscape also presents...
Authors
Water Resources Division U.S. Geological Survey

NOAA-USGS Debris-Flow Warning System - Final Report NOAA-USGS Debris-Flow Warning System - Final Report

Landslides and debris flows cause loss of life and millions of dollars in property damage annually in the United States (National Research Council, 2004). In an effort to reduce loss of life by debris flows, the National Oceanic and Atmospheric Administration's (NOAA) National Weather Service (NWS) and the U.S. Geological Survey (USGS) operated an experimental debris-flow prediction and...
Authors

Regional landslide-hazard assessment for Seattle, Washington, USA Regional landslide-hazard assessment for Seattle, Washington, USA

Landslides are a widespread, frequent, and costly hazard in Seattle and the Puget Sound area of Washington State, USA. Shallow earth slides triggered by heavy rainfall are the most common type of landslide in the area; many transform into debris flows and cause significant property damage or disrupt transportation. Large rotational and translational slides, though less common, also cause...
Authors
R.L. Baum, J. A. Coe, J. W. Godt, E. L. Harp, M.E. Reid, W. Z. Savage, W.H. Schulz, D.L. Brien, A.F. Chleborad, J.P. McKenna, J. A. Michael

Geology and tsunamigenic potential of submarine landslides in Santa Barbara Channel, Southern California Geology and tsunamigenic potential of submarine landslides in Santa Barbara Channel, Southern California

A large submarine landslide complex and four small landslides developed under the Santa Barbara Channel, suggesting a potential hazard from landslide-generated tsunamis. We integrate offshore stratigraphy and geologic structure, multibeam bathymetric information, and several kinds of seismic-reflection data to understand how and when the submarine landslides formed. Seismic-reflection...
Authors
M. A. Fisher, W. R. Normark, H. Gary Greene, H.J. Lee, R. W. Sliter
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