Jeffrey Coe
Biography
I began my career at the USGS in 1988 and joined the Landslide Hazards group in 1996. Early in my career, I was fortunate to work on an assortment of geologic problems (paleoseismology, structural geology, debris-flow hazards) related to the proposed Yucca Mountain Nuclear Waste Repository in Nevada. I’ve been able to utilize this broad base of experience in the Landslide Hazards group, where I’ve worked on a wide variety of landslide types and topics in the US and abroad. I’m currently the chief of the Landslide Magnitude and Mobility research project based in Golden, CO. My broad research focus is on understanding landslide processes and quantifying landslide hazards. I’m currently interested in gaining a better understanding of the impact that climate change will have on landslide hazards.
Education:
Kent State University, B.S., 1984, Geology
Colorado School of Mines, M.S., 1995, Geology
Science and Products
Barry Arm, Alaska Landslide and Tsunami Monitoring
A large steep slope in the Barry Arm fjord 30 miles (50 kilometers) northeast of Whittier, Alaska has the potential to fall into the water and generate a tsunami that could have devastating local effects on those who live, work, and recreate in and around Whittier and in northern Prince William Sound.
Potential Landslide Paths and Implications for Tsunami Hazards in Glacier Bay, Alaska – An Initial Investigation
Glacier Bay and its inlets are a popular destination for cruise ships and passenger boats; about 540,000 people visited Glacier Bay National Park and Preserve (GBNPP) in 2017. A typical tour of the Bay traverses the entire length up to the glacier calving viewpoints in the Johns Hopkins and Tarr Inlets. A 2018 article “Landslides and Giant Waves” by the National Park Service (NPS) states, “...
Mountain Permafrost, Climate Change, and Rock Avalanches in Glacier Bay National Park, Alaska
Release Date: JUNE 18, 2018
We usually hear about landslides and avalanches that are caused by large amounts of rainfall, the shaking from earthquakes, or a volcanic eruption, but we may be hearing more about avalanches caused by the (seemingly innocuous) melting of ice in the coming years.
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.
Chalk Cliffs, Colorado
Chalk Cliffs, located 8 miles southwest of Buena Vista, CO, is one of the most active debris-flow areas in the state.
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
Map showing recent (1997-98 El Niño) and historical landslides, Crow Creek and vicinity, Alameda and Contra Costa Counties, California
By Jeffrey A. Coe,1 Jonathan W. Godt,1 and Pierre Tachker2
1 U.S. Geological Survey, Denver Federal Center, MS 966, Denver, CO 80225
2 Institut Des Sciences Et Techniques De Grenoble, Département Géotechnique, Grenoble, France
Debris Flows Triggered by the El Niño Rainstorm of February 2-3, 1998, Walpert Ridge and Vicinity, Alameda County, California
By Jeffrey A. Coe and Jonathan W. Godt
Map of landslide structures and kinematic elements at Barry Arm, Alaska in the summer of 2020
Two active landslides at and near the retreating front of Barry Glacier at the head of Barry Arm Fjord in southern Alaska (Figure 1) could generate tsunamis if they failed rapidly and entered the water of the fjord. Landslide A, at the front of the glacier, is the largest, with a total volume estimated at 455 M m3 (Dai et al, 2020).
Map and model input and output data for the north Charlotte Creek Basin, Douglas County, Oregon, for analysis of debris-flow initiation resulting from the storm of November 17 - 19, 1996
Heavy rainfall during mid-November 1996 induced debris flows throughout the southern Oregon Coast Range, including more than 150 in the immediate vicinity of north Charlotte Creek (Coe and others, 2011). Data in this project pertain to a 2.4-km2 area centered at N 43.65° and W 123.94° which an area where high concentrations of debris flows occurred. These data include a subset
Interferometric synthetic aperture radar data from 2020 for landslides at Barry Arm Fjord, Alaska
Subaerial landslides at the head of Barry Arm Fjord in southern Alaska could generate tsunamis (if they rapidly failed into the Fjord) and are therefore a potential threat to people, marine interests, and infrastructure throughout the Prince William Sound region. Knowledge of ongoing landslide movement is essential to understanding the threat posed by the landslides. Because of the landsl
Inventory map of submarine and subaerial-to-submarine landslides in Glacier Bay, Glacier Bay National Park and Preserve, Alaska
Mass-wasting events that displace water, whether they initiate from underwater sources (submarine landslides) or subaerial sources (subaerial-to-submarine landslides), have the potential to cause tsunami waves that can pose a significant threat to human life and infrastructure in coastal areas (for example towns, cruise ships, bridges, oil platforms, and communication lines%
Summary Metadata for Inventory data of rock avalanches in the Saint Elias Mountains of southeast Alaska, derived from Landsat Imagery (1984-2019)
Glacial retreat and mountain-permafrost degradation resulting from rising global temperatures have the potential to impact the frequency and magnitude of landslides in glaciated environments. In the Saint Elias Mountains of southeast Alaska, the presence of weak sedimentary and metamorphic rocks and active uplift resulting from the collision of the Yakutat and North American tectonic plates...
Debris-flow monitoring data, Chalk Cliffs, Colorado, USA, 2014
This data release includes 2014 time-series data from three debris-flow monitoring stations at Chalk Cliffs in Chaffee County, Colorado, USA. The data were collected to help identify the triggering conditions, magnitude, and mobility of debris flows at the site. The three stations are located sequentially along a channel draining the 0.3 km^2 study area. The Upper, Middle, and Lowe
Monitoring environmental controls on debris-flow sediment supply, Chalk Cliffs, Colorado, 2011 to 2015
This data release includes time-series data of rock temperature, air temperature, wind speed, and humidity at the Chalk Cliffs debris-flow monitoring site in central Colorado (Latitude: 38.73330, Longitude: -106.18704). The data were collected to help identify the environmental controls on rates of rockfall, which is the primary source of debris-flow material at the site. Data w
Map data from landslides triggered by Hurricane Maria in four study areas of Puerto Rico
In September 2017, Hurricane Maria caused widespread landsliding throughout mountainous regions of Puerto Rico. Nearly all landslides mobilized as debris flows (Bessette-Kirton et al., 2019), but herein, we simply use the term “landslides” when describing all types of slope failures that occurred during Hurricane Maria. To examine the extent and physical characteristic
Summary metadata for debris-flow inundation and damage data from the 9 January 2018 Montecito Debris-Flow Event
On 9 January 2018, intense rain above Montecito, California triggered a series of debris flows from steep catchments in the Santa Ynez Mountains. These catchments were burned three weeks earlier by the 1140 km2 Thomas Fire. After exiting the mountain front, the debris flows traveled over 3 km down a series of alluvial fans, killing 23 people and damaging over 400 homes. To understand the
Pre- and post-event digital elevation models generated from high-resolution stereo satellite imagery of the 2016 Lamplugh rock avalanche in Glacier Bay National Park and Preserve, Alaska
The use of high-resolution remotely sensed imagery can be an effective way to obtain quantitative measurements of rock-avalanche volumes and geometries in remote glaciated areas, both of which are important for an improved understanding of rock-avalanche characteristics and processes. We utilized the availability of high-resolution (~0.5 m) WorldView satellite stereo imagery to derive dig
Map data showing concentration of landslides caused by Hurricane Maria in Puerto Rico
On September 20, 2017, Hurricane Maria hit the U.S. territory of Puerto Rico as a category 4 storm. Heavy rainfall caused landslides in mountainous regions throughout the territory. This data release presents geospatial data describing the concentration of landslides generated by Hurricane Maria in Puerto Rico. We used post-hurricane satellite and aerial imagery collected between September 26...
Map data and Unmanned Aircraft System imagery from the May 25, 2014 West Salt Creek rock avalanche in western Colorado
On May 25, 2014, a rain-on-snow induced rock avalanche occurred in the West Salt Creek Valley on the northern flank of Grand Mesa in western Colorado. The avalanche mobilized from a preexisting rock slide and traveled 4.6 km down the confined valley, killing 3 people. The avalanche was rare for the contiguous U.S. because of its large size (54.5 Mm3) and long travel distance. To underst
Preliminary assessment of the wave generating potential from landslides at Barry Arm, Prince William Sound, Alaska
We simulated the concurrent rapid motion of landslides on an unstable slope at Barry Arm, Alaska. Movement of landslides into the adjacent fjord displaced fjord water and generated a tsunami, which propagated out of Barry Arm. Rather than assuming an initial sea surface height, velocity, and location for the tsunami, we generated the tsunami...
Barnhart, Katherine R.; Jones, Ryan P.; George, David L.; Coe, Jeffrey A.; Staley, Dennis M.
When hazard avoidance is not an option: lessons learned from monitoring the postdisaster Oso landslide, USA
On 22 March 2014, a massive, catastrophic landslide occurred near Oso, Washington, USA, sweeping more than 1 km across the adjacent valley flats and killing 43 people. For the following 5 weeks, hundreds of workers engaged in an exhaustive search, rescue, and recovery effort directly in the landslide runout path. These workers could not avoid the...
Reid, Mark E.; Godt, Jonathan W.; LaHusen, Richard G; Slaughter, Stephen L; Badger, Thomas C.; Collins, Brian D.; Schulz, William; Baum, Rex L.; Coe, Jeffrey A.; Harp, Edwin L; Schmidt, Kevin; Iverson, Richard M.; Smith, Joel B.; Haugerud, Ralph; George, David L. Progress and lessons learned from responses to landslide disasters
Landslides have the incredible power to transform landscapes and also, tragically, to cause disastrous societal impacts. Whereas the mechanics and effects of many landslide disasters have been analyzed in detail, the means by which landslide experts respond to these events has garnered much less attention. Herein, we evaluate nine landslide...
Collins, Brian D.; Reid, Mark E.; Coe, Jeffrey A.; Kean, Jason W.; Baum, Rex L.; Jibson, Randall W.; Godt, Jonathan W.; Slaughter, Stephen; Stock, Greg M. Debris-flow growth in Puerto Rico during Hurricane Maria: Preliminary results from analyses of pre- and post-event lidar data
On September 20, 2017, Hurricane Maria triggered widespread debris flows in Puerto Rico. We used field observations and pre- and post-Maria lidar to study the volumetric growth of long-travelled (>400 m) debris flows in four basins. We found overall growth rates that ranged from 0.7 to 30.4 m3 per meter of channel length. We partitioned the...
Coe, Jeffrey A.; Bessette-Kirton, Erin K.; Brien, Dianne L.; Reid, Mark E. Bellwether sites for evaluating changes in landslide frequency and magnitude in cryospheric mountainous terrain: A call for systematic, long-term observations to decipher the impact of climate change
Permafrost and glaciers are being degraded by the warming effects of climate change. The impact that this degradation has on slope stability in mountainous terrain is the subject of ongoing research efforts. The relatively new availability of high-resolution (≤ 10 m) imagery with worldwide coverage and short (≤ 30 days) repeat...
Coe, Jeffrey A. A 36-year record of rock avalanches in the Saint Elias Mountains of Alaska, with implications for future hazards
Glacial retreat and mountain-permafrost degradation resulting from rising global temperatures have the potential to impact the frequency and magnitude of landslides in glaciated environments. Several recent events, including the 2015 Taan Fiord rock avalanche, which triggered a tsunami with one of the highest wave runups ever recorded, have called...
Bessette-Kirton, Erin K.; Coe, Jeffrey A. Mobility characteristics of landslides triggered by Hurricane Maria in Puerto Rico
Mobility is an important element of landslide hazard and risk assessments yet has been seldom studied for shallow landslides and debris flows in tropical environments. In September 2017, Hurricane Maria triggered > 70,000 landslides across Puerto Rico. Using aerial imagery and a lidar digital elevation model (DEM), we mapped and characterized...
Bessette-Kirton, Erin K.; Coe, Jeffrey A.; Schulz, William; Cerovski-Darriau, Corina; Einbund, Mason Muir The influence of frost weathering on the debris flow sediment supply in an alpine basin
Rocky, alpine mountains are prone to mass wasting from debris flows. The Chalk Cliffs study area (central Colorado, USA) produces debris flows annually. These debris flows are triggered when overland flow driven by intense summer convective storms mobilizes large volumes of sediment within the channel network. Understanding the debris flow...
Rengers, Francis K.; Kean, Jason W.; Reitman, Nadine G.; Smith, Joel B.; Coe, Jeffrey A.; McGuire, Luke An initial assessment of areas where landslides could enter the West Arm of Glacier Bay, Alaska and implications for tsunami hazards
Tsunamis generated by landslides in Glacier Bay are uncommon, but have potential to be extraordinarily destructive when they occur. This article identifies areas that are susceptible to landslides that could generate tsunamis and discusses approaches to characterize hazard and risk from these events.
Coe, Jeffrey A.; Schmitt, Robert G.; Bessette-Kirton, Erin The 2016 Lamplugh rock avalanche, Alaska: Deposit structures and emplacement dynamics
Supraglacial landslides result from the catastrophic failure of periglacial rock slopes and deposit large volumes of rock and ice onto the glacier surface. The most remarkable features of these landslides are their prominent long flowbands and a high mobility that exceeds that of their counterparts in other environments. Based on field surveys,...
Dufresne, A.; Wolken, G.; Hibert, C; Bessette-Kirton, Erin; Coe, Jeffrey A.; Geertsema, M.; Ekström, G A 4000-year history of debris flows in north-central Washington State, U.S.A.: Preliminary results from trenching and surficial geologic mapping at the Pope Creek fan
Long-term records of the magnitude and frequency of debris flows on fans are rare, but such records provide critical information needed for debris-flow hazard and risk assessments. This study explores the history of debris flows on a fan with seasonally inhabited cabins at Pope Creek along the Entiat River about 48 km upstream from the town of...
Coe, Jeffrey A.; Bessette-Kirton, Erin; Slaughter, Stephen; Rengers, Francis K.; Contreras, Trevor A.; Michelson, Katherin A; Taylor, Emily; Kean, Jason W.; Jacobacci, Kara; Hanson, Molly A Exploring controls on debris-flow surge velocity and peak discharge at Chalk Cliffs, Colorado, USA
We present a series of debris-flow events and use combined sensor and video data to explore how sediment concentration and triggering rainfall intensity affect the velocity and discharge of debris-flow surges generated by surface-water runoff. We analyze an initial data set of 49 surges from four debris-flow events recorded by a monitoring system...
Smith, Joel B.; Kean, Jason W.; Coe, Jeffrey A.
Potential Landslides and Tsunami Hazards in Glacier Bay, Alaska
USGS landslide scientists recently completed an investigation that provides an initial assessment of areas where landslides could enter the water of Glacier Bay and generate tsunamis.
USGS Geologists Join Efforts in Montecito to Assess Debris-Flow Aftermath
Days after fatal debris flows devastated Southern California’s Montecito community, a team of U.S. Geological Survey geologists joined county, state, and federal partners to survey and evaluate the aftermath.