Rex works as a research geologist in the Landslide Hazards Program of the U.S. Geological Survey. He is currently the chief of the Landslide Initiation Processes and Probability Project.
While at the USGS Rex has conducted research on landslide processes, monitoring, forecasting and warning, and hazards in the Colorado Plateau, Colorado Front Range, southern Rocky Mountains, southwest Ohio, central California, Hawaii, the Pacific Northwest, Puerto Rico, Poland, and El Salvador, Central America.
Science and Products
Sitka, AK
On August 18, 2015, heavy rainfall triggered around 60 landslides in and around the city of Sitka, AK. The landslides moved downslope rapidly; several were damaging and one of these demolished a home on South Kramer Avenue killing three people.
Preliminary Landslide Susceptibility Maps and Data for Hawaii
Landslide Susceptibility Data and Maps provide tools for hazard assessment prior to an event that may cause landslides.
Seattle Area, Washington
Monitoring at this site is for researching rainfall thresholds for forecasting landslide potential. Shallow landslides are common on coastal bluffs overlooking Puget Sound.
Millicoma Meander, Elliott State Forest, Oregon
The USGS and its cooperators have installed instruments in a steep, recently clear-cut basin in the Elliott State Forest.
Portland, Oregon
Landslides in the West Hills of Portland pose a hazard to people and property.
Knife Ridge, Elliott State Forest, Oregon
The USGS and its cooperators have installed instruments in a steep hillside about 20 km southeast of Reedsport in the Elliott State Forest.
Landslides Can Cause More Landslides
Release Date: MAY 15, 2018 The deadliest individual landslides in the U.S. recently were in places where there had previously been a landslide. Why do landslides happen in the same place instead of on nearby slopes that appear to be just as likely, if not more likely, to slide?
Integrating Disparate Spatial Datasets from Local to National Scale for Open-Access Web-Based Visualization and Analysis: A Case Study Compiling U.S. Landslide Inventories
Spatial data on landslide occurrence across the U.S. varies greatly in quality, accessibility, and extent. This problem of data variability is common across USGS Mission Areas; it presents an obstacle to developing national-scale products and to identifying areas with relatively good/bad data coverage. We compiled available data of known landslides into a national-scale, searchable online map, whi
Reconstruction of an Avalanche: The West Salt Creek Rock Avalanche
Release Date: MAY 25, 2016 The West Salt Creek Rock Avalanche, Colorado, May 25, 2014
Science and Products
- Science
Sitka, AK
On August 18, 2015, heavy rainfall triggered around 60 landslides in and around the city of Sitka, AK. The landslides moved downslope rapidly; several were damaging and one of these demolished a home on South Kramer Avenue killing three people.Preliminary Landslide Susceptibility Maps and Data for Hawaii
Landslide Susceptibility Data and Maps provide tools for hazard assessment prior to an event that may cause landslides.Seattle Area, Washington
Monitoring at this site is for researching rainfall thresholds for forecasting landslide potential. Shallow landslides are common on coastal bluffs overlooking Puget Sound.Millicoma Meander, Elliott State Forest, Oregon
The USGS and its cooperators have installed instruments in a steep, recently clear-cut basin in the Elliott State Forest.Portland, Oregon
Landslides in the West Hills of Portland pose a hazard to people and property.Knife Ridge, Elliott State Forest, Oregon
The USGS and its cooperators have installed instruments in a steep hillside about 20 km southeast of Reedsport in the Elliott State Forest.Landslides Can Cause More Landslides
Release Date: MAY 15, 2018 The deadliest individual landslides in the U.S. recently were in places where there had previously been a landslide. Why do landslides happen in the same place instead of on nearby slopes that appear to be just as likely, if not more likely, to slide?Integrating Disparate Spatial Datasets from Local to National Scale for Open-Access Web-Based Visualization and Analysis: A Case Study Compiling U.S. Landslide Inventories
Spatial data on landslide occurrence across the U.S. varies greatly in quality, accessibility, and extent. This problem of data variability is common across USGS Mission Areas; it presents an obstacle to developing national-scale products and to identifying areas with relatively good/bad data coverage. We compiled available data of known landslides into a national-scale, searchable online map, whiReconstruction of an Avalanche: The West Salt Creek Rock Avalanche
Release Date: MAY 25, 2016 The West Salt Creek Rock Avalanche, Colorado, May 25, 2014 - Data
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