Natural Hazards

Filter Total Items: 725
Date published: June 1, 2020
Status: Active

Tsunami and Earthquake Research

Here you will find general information on the science behind tsunami generation, computer animations of tsunamis, and summaries of past field studies. 

The scope of tsunami research within the USGS, however, is broader than the topics covered here. USGS researchers have also provided critical research toward understanding how sediments are transported during tsunami runup and...

Contacts: Eric Geist
Date published: May 29, 2020
Status: Active

Argon Geochronology

This project supports the USGS argon geochronology laboratory in Denver. The USGS 40Ar/39Ar geochronology laboratory is a state-of-the-art research facility for determining absolute ages of minerals and rocks. The 40Ar/39Ar laboratory contributes critical geochronology to individual USGS research projects and to partners in academia and other Federal...

Date published: May 29, 2020
Status: Completed

The Blind Zone of Earthquake Early Warning

Residents in California, Oregon, and Washington have been told that earthquake early warning (EEW) is at their doorstep and will alert them to the shaking from an earthquake before it arrives. Some media reports have said there will be “up to a minute of warning”. The problem is, for onshore earthquakes these claims are exaggerated, and under some conditions a warning is not scientifically or...

Date published: May 25, 2020
Status: Active

The Impact of Sea-Level Rise and Climate Change on Pacific Ocean Atolls

Providing basic understanding and specific information on storm-wave inundation of atoll islands that house Department of Defense installations; and assessing the resulting impact of sea-level rise and storm-wave inundation on infrastructure and freshwater availability under a variety of sea-level rise and climatic scenarios....

Contacts: Curt Storlazzi, PhD, Li Erikson, Stephen B Gingerich, Clifford I Voss, Ph.D., Edwin Elias, Peter Swarzenski, Ap van Dongeren, Gregory PIniak, Donald Field, Annamalai Hariharasubramanian, Kevin Hamilton, Yuqing Wang
Date published: May 20, 2020
Status: Active

Numerical Models of the Physics Underpinning Induced Earthquakes

The USGS uses computer simulations to evaluate the physical relationships between fluid injection (or extraction) and earthquakes. We can only indirectly study these relationships using observations, so computer simulations help us gain a better physical understanding for the processes that are most likely causing these earthquakes. Scientists can also use such simulations to understand...

Date published: May 20, 2020
Status: Completed

Hazard Estimation for Induced Earthquakes

In 2016, 2017, and 2018, the USGS released ...

Date published: May 20, 2020
Status: Active

Observational Studies of Induced Earthquakes

In response to sudden changes in seismicity that are potentially induced by human activity, the USGS may deploy temporary seismic stations to better understand the earthquakes. These deployments typically consist of 2-15 seismometers placed in the immediate vicinity of the seismicity.

Date published: May 20, 2020
Status: Active

Myths and Misconceptions About Induced Earthquakes

Do you know the facts about induced earthquakes?

Date published: May 11, 2020
Status: Active

Denali National Park Geohazards Geologic Mapping

Denali National Park (DENA) is a major draw for tourism and recreation and a major economic engine for central Alaska. However, the geologic forces that created the steep landscape of DENA also make it prone to geologic hazards (geohazards) like landslides, debris flows, and earthquakes. DENA has only one major road, called the ‘Park Road’, that serves nearly all of its infrastructure.

...

Date published: May 11, 2020
Status: Completed

Hurricane Irene

Aerial photography and laser altimetry was collected to document beach morphology and the response to this storm. Comparisons of pre- and post-storm data were used to show the nature, magnitude, and spatial variability of coastal changes such as beach erosion, overwash deposition, and island breaching. These data were also used to further refine predictive models of coastal impacts from severe...

Date published: May 4, 2020
Status: Active

An Analysis of Trends in the Magnitude of Floods in Urbanized Watersheds on Long Island, New York

Summary: This study aims to do a thorough analysis of trends in peak streamflows on Long Island. Reliable information about the magnitude and frequency of floods is essential for flood insurance studies, flood-plain management, and the design of transportation and water-conveyance infrastructure, such as roads, bridges, culverts, dams, and levees. Federal, State, regional, and local officials...

Date published: May 1, 2020
Status: Active

Offshore Faults along Central and Northern California

From Point Conception to Cape Mendocino, seafloor faults have been, in the past, mapped in varying ways and without enough detail to assess their earthquake potential. To provide this important information, USGS uses advanced technology to image offshore faults that could trigger devastating earthquakes near densely populated areas and a nuclear power plant.

Contacts: Janet Watt