At the USGS National Earthquake Information Center (NEIC), our team locates and researches earthquakes to provide information on how to reduce risk from earthquakes.
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At the USGS National Earthquake Information Center (NEIC), our team locates and researches earthquakes to provide information on how to reduce risk from earthquakes.
At the USGS National Earthquake Information Center (NEIC), our team locates and researches earthquakes to provide information on how to reduce risk from earthquakes.
At the USGS National Earthquake Information Center (NEIC), our team locates and researches earthquakes to provide information on how to reduce risk from earthquakes.
Ever wonder what it is like to work as a USGS intern? Dive into these intern stories of how students are making science their superpower while studying earthquakes!
Ever wonder what it is like to work as a USGS intern? Dive into these intern stories of how students are making science their superpower while studying earthquakes!
Every 11 years the Sun's magnetic field flips. This period is referred to as a solar cycle. As we approach the peak of Solar Cycle 25, activity on the Sun’s surface will increase, including more solar flares, sunspots, and coronal mass ejections.
Every 11 years the Sun's magnetic field flips. This period is referred to as a solar cycle. As we approach the peak of Solar Cycle 25, activity on the Sun’s surface will increase, including more solar flares, sunspots, and coronal mass ejections.
Every 11 years the Sun's magnetic field flips. This period is referred to as a solar cycle. As we approach the peak of Solar Cycle 25, activity on the Sun’s surface will increase, including more solar flares, sunspots, and coronal mass ejections.
Every 11 years the Sun's magnetic field flips. This period is referred to as a solar cycle. As we approach the peak of Solar Cycle 25, activity on the Sun’s surface will increase, including more solar flares, sunspots, and coronal mass ejections.
![Atmospheric rivers cause the majority of precipitation-induced landslides in Western North America Satellite view of clouds over the western United States](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Vallejo-Bernal_thumbnail.jpg?itok=ikOr-EZO)
Atmospheric rivers cause the majority of precipitation-induced landslides in Western North America
linkAtmospheric rivers (ARs) are transient channels of intense horizontal water vapor transport in the lower atmosphere.
Atmospheric rivers cause the majority of precipitation-induced landslides in Western North America
linkAtmospheric rivers (ARs) are transient channels of intense horizontal water vapor transport in the lower atmosphere.
![Cascading Hazards: Earthquake Triggered Landslides video thumbnail cascading hazards](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/CascadingHazards_thumbnail.png?itok=neQh8van)
On February 6, 2023, magnitude 7.8 and 7.5 earthquakes struck Turkey near the Syrian border. Over 50,000 people lost their lives. Earthquake shaking was not the only hazard. The quake triggered landslides, liquefaction, and other cascading hazards.
On February 6, 2023, magnitude 7.8 and 7.5 earthquakes struck Turkey near the Syrian border. Over 50,000 people lost their lives. Earthquake shaking was not the only hazard. The quake triggered landslides, liquefaction, and other cascading hazards.
![Measuring Landslide Thickness: Seismic Equipment Used for More Than Earthquakes video thumbnail landslide thickness](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/LandslideThickness_thumbnail.png?itok=WIvaHU6U)
Ever wonder how scientists measure how thick landslides are? There are a few ways, but the one Kate Allstadt explains might surprise you.
Ever wonder how scientists measure how thick landslides are? There are a few ways, but the one Kate Allstadt explains might surprise you.
![Landslide risk evaluation: tools and tips for risky decisions Blue lake between two mountains with white outline around landslide](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/20240110-Strouth-Thumbnail.png?itok=UhTfSeTZ)
When a landslide is recognized to be life-threatening, difficult decisions follow. Like, should the house be evacuated? Is the community safe enough? How much should be invested in mitigation? For the past two decades, we have been applying a quantitative risk management framework to inform these types of decisions.
When a landslide is recognized to be life-threatening, difficult decisions follow. Like, should the house be evacuated? Is the community safe enough? How much should be invested in mitigation? For the past two decades, we have been applying a quantitative risk management framework to inform these types of decisions.
![One Way to Develop a Geologic Hazards Program: Lessons Learned and Anecdotes Aerial view of highway blocked by mud, water, and debris](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/LHP-Seminar-20231220-Chastain-Carpenter-Thumbnail.png?itok=mswddoQz)
The development of a Geologic Hazards Program for the USDA Forest Service is a challenging undertaking.
The development of a Geologic Hazards Program for the USDA Forest Service is a challenging undertaking.
![Forecasting and seismic detection of debris flows at Mount Rainier National Park mud-coated boulders, tree branches, and mud on the ground and forming a dam against standing pines](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/20231108-Beason-Thumbnail.jpg?itok=xy3m_qrR)
Debris flows occur as a result of glacial outburst floods or intense fall storms prior to snow accumulations and occur commonly at the glaciated Mount Rainier, WA. Over 60 such events have been documented since 1928, 35+ of which have occurred in Tahoma Creek on the southwest side of the park.
Debris flows occur as a result of glacial outburst floods or intense fall storms prior to snow accumulations and occur commonly at the glaciated Mount Rainier, WA. Over 60 such events have been documented since 1928, 35+ of which have occurred in Tahoma Creek on the southwest side of the park.
![Kinematic evolution of a large paraglacial landslide in the Barry Arm fjord of Alaska Barry Arm of Harriman Fjord, Prince William Sound, Alaska](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Barry_Arm_PWS_May%202020.jpg?itok=7neZisEC)
In the Barry Arm fjord of Alaska, repeat, high-resolution aerial and satellite data provide a unique opportunity to learn how a large bedrock landslide with a receding and thinning glacier at the toe is deforming.
In the Barry Arm fjord of Alaska, repeat, high-resolution aerial and satellite data provide a unique opportunity to learn how a large bedrock landslide with a receding and thinning glacier at the toe is deforming.
![Communicating landslide information and hazards with maps and graphics at the Washington Geological Survey illustration of hillslope above river](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/LHP-Seminar-20230517-Coe-Thumbnail_1.jpg?itok=N8g58USJ)
Communicating landslide information and hazards with maps and graphics at the Washington Geological Survey
linkThe Washington Geological Survey works to increase public and scientific understanding of landslide hazards in Washington State. One of the ways that we do this is through use of interpretive maps, illustrations, and other types of graphics. I will show several examples of these products and will discuss some of the methods used to construct them.
Communicating landslide information and hazards with maps and graphics at the Washington Geological Survey
linkThe Washington Geological Survey works to increase public and scientific understanding of landslide hazards in Washington State. One of the ways that we do this is through use of interpretive maps, illustrations, and other types of graphics. I will show several examples of these products and will discuss some of the methods used to construct them.
While California has been known to experience a fire-flood cycle for about a century, post-fire flood and debris-flow risks are increasing due to increases in the frequency and intensity of wildfires and storms and urbanization in fire- and flood-prone areas.
While California has been known to experience a fire-flood cycle for about a century, post-fire flood and debris-flow risks are increasing due to increases in the frequency and intensity of wildfires and storms and urbanization in fire- and flood-prone areas.
![The spatial distribution of post-fire debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California Large tree lying across hillslope above channel](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/LHP-Seminar-20230322-Cavagnaro-Thumbnail.jpg?itok=NhYNff7E)
The spatial distribution of post-fire debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California
linkA range of flow types can be observed in steep, recently-burned terrain, but predicting the spatial distribution of debris flows resulting from a single storm event remains challenging.
The spatial distribution of post-fire debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California
linkA range of flow types can be observed in steep, recently-burned terrain, but predicting the spatial distribution of debris flows resulting from a single storm event remains challenging.
![Liquefaction or liquefiction? Anthropogenic regulation and the influence of evaporite dissolution on ground failure in the 2019 Mw 7.1 Ridgecrest Earthquake and beyond aerial photo with various patterns and colors](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/LHP-Seminar-20230215-Burgi-Thumbnail_0.png?itok=Fm9uzMt_)
Liquefaction or liquefiction? Anthropogenic regulation and the influence of evaporite dissolution on ground failure in the 2019 Mw 7.1 Ridgecrest Earthquake and beyond
linkOptical remote sensing observations of the 2019 Ridgecrest, California, earthquake sequence revealed a significant amount of surface ejecta in the nearby Searles Lake, including one area where the surface ejecta was arranged in a repeating hexagonal “honeycomb” pattern.
Liquefaction or liquefiction? Anthropogenic regulation and the influence of evaporite dissolution on ground failure in the 2019 Mw 7.1 Ridgecrest Earthquake and beyond
linkOptical remote sensing observations of the 2019 Ridgecrest, California, earthquake sequence revealed a significant amount of surface ejecta in the nearby Searles Lake, including one area where the surface ejecta was arranged in a repeating hexagonal “honeycomb” pattern.
![Blockslides, summit grabens, and collapsing highwalls of the Appalachian Valley and Ridge: Using lidar-derived imagery to reevaluate a thoroughly studied landscape Shaded image of hillslope](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/LHP-Seminar-20230118-Prince-Thumbnail.jpg?itok=RIXCQmHc)
Blockslides, summit grabens, and collapsing highwalls of the Appalachian Valley and Ridge: Using lidar-derived imagery to reevaluate a thoroughly studied landscape
linkIn the mid-1980s, Art Schultz (USGS, ret.) drew on experiences in the Colorado Front Range to identify numerous large, stratigraphically intact, kilometer-scale bedrock landslides on interbedded sandstone-shale dip slopes in the Virginia Valley and Ridge.
Blockslides, summit grabens, and collapsing highwalls of the Appalachian Valley and Ridge: Using lidar-derived imagery to reevaluate a thoroughly studied landscape
linkIn the mid-1980s, Art Schultz (USGS, ret.) drew on experiences in the Colorado Front Range to identify numerous large, stratigraphically intact, kilometer-scale bedrock landslides on interbedded sandstone-shale dip slopes in the Virginia Valley and Ridge.
Dr. Annemarie Baltay talks about the October 25th, 2022 M5.1 earthquake in Seven Trees, California.
Dr. Annemarie Baltay talks about the October 25th, 2022 M5.1 earthquake in Seven Trees, California.
![Landslide susceptibility in Minnesota: Insight from landslide inventory mapping and lidar change detection multiple maps with different colors and labels](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/20220914-DeLong-Thumbnail.png?itok=Vtx0t1J4)
Landslide susceptibility in Minnesota: Insight from landslide inventory mapping and lidar change detection
linkThe recently published landslide inventory for most landslide-prone areas in Minnesota provides the basis for generation of landslide susceptibility maps. These maps are derived from logistic regression analysis of mapped landslide occurrences, terrain characteristics, and Quaternary geological mapping.
Landslide susceptibility in Minnesota: Insight from landslide inventory mapping and lidar change detection
linkThe recently published landslide inventory for most landslide-prone areas in Minnesota provides the basis for generation of landslide susceptibility maps. These maps are derived from logistic regression analysis of mapped landslide occurrences, terrain characteristics, and Quaternary geological mapping.
![Virtual Field Excursion to Glenwood Canyon, Colorado: and the post-fire debris flows from the 2020 Grizzly Creek Fire black and white image of mountain with text](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/glenwood_canyon_final_big_Moment2.jpg?itok=DBBqcYKW)
Virtual Field Excursion to Glenwood Canyon, Colorado: and the post-fire debris flows from the 2020 Grizzly Creek Fire
linkThis video serves as a virtual fieldtrip to document the debris flow activity following the Grizzly Creek Fire in the Glenwood Canyon, CO, USA. The Grizzly Creek Fire initiated in August 2020, and widespread destructive debris flow activity followed the during the summer of 2021.
Virtual Field Excursion to Glenwood Canyon, Colorado: and the post-fire debris flows from the 2020 Grizzly Creek Fire
linkThis video serves as a virtual fieldtrip to document the debris flow activity following the Grizzly Creek Fire in the Glenwood Canyon, CO, USA. The Grizzly Creek Fire initiated in August 2020, and widespread destructive debris flow activity followed the during the summer of 2021.
![Temporal changes in rainfall intensity-duration thresholds for debris flows in a recovering burned area burnt trees and sparse vegetation on hillslope](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/20220817-Hoch-Thumbnail.jpg?itok=99DDc-u6)
Temporal changes in rainfall intensity-duration thresholds for debris flows in a recovering burned area
linkPost-fire debris flows are often observed during the first rainy season following a wildfire, but it is unclear how long the elevated threat of debris flow persists. We constrained a hydrologic model using field and remotely sensed measurements of soil-infiltration capacity, vegetation cover, runoff, and debris-flow activity.
Temporal changes in rainfall intensity-duration thresholds for debris flows in a recovering burned area
linkPost-fire debris flows are often observed during the first rainy season following a wildfire, but it is unclear how long the elevated threat of debris flow persists. We constrained a hydrologic model using field and remotely sensed measurements of soil-infiltration capacity, vegetation cover, runoff, and debris-flow activity.