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Costs and consequences of natural hazards can be enormous; each year more people and infrastructure are at risk. We develop and apply hazards science to help protect U.S. safety, security, and economic well being. These scientific observations, analyses, and research are crucial for the Nation to become more resilient to natural hazards.Read Our Science Strategy
Worked with USGS California Volcano Observatory (CalVO) and California Office of Emergency Services (Cal OES) to plan and stage a workshop to raise awareness, increase buy-in, and gather information for a volcano hazards annex to the California's State emergency plan.
The Earthquake Hazards Program monitors and reports earthquakes, assesses earthquake impacts and hazards, and researches the causes and effects of earthquake.
A modeled scenario of U.S. West Coast winter storm events induced by the formation of Atmospheric Rivers (AR) and capable of causing massive and devastating flooding.
In the late summer of 2005, the remarkable flooding brought by Hurricane Katrina, which caused more than $200 billion in losses, constituted the costliest natural disaster in U.S. history. However, even in typical years, flooding causes billions of dollars in damage and threatens lives and property in every State.
Students at Art Center College of Design prototyped wildfire awareness campaigns after SAFRR exposed them to wildfire research and safety issues.
This website brings together information about current and past flooding and USGS flood-focused resources. The USGS provides practical, unbiased information about the Nation's rivers and streams that is crucial in mitigating hazards associated with floods.
Explore critical pre- and post-disaster images and datasets online for immediate viewing and downloading. These images are used in disaster preparations, rescue and relief operations, damage assessments, and reconstruction efforts. We supply satellite and aerial images for analysis of disaster areas before, during, and after a disaster.
Research projects within the USGS Geomagnetism Program are targeted for societal relevance, especially for space-weather hazard science.
The IGEMS provides the public with both an overview and more specific information on current natural hazard events. The Department of the Interior’s Office of Emergency Management provides it as an internet-accessible service.
The USGS Geomagnetism Program currently operates 14 magnetic observatories. Magnetometer data are collected at these facilities, and the data are then transmitted to Program headquarters in Golden, Colorado.
The AVO is a partnership among the USGS, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys. To mitigate volcanic hazards, AVO monitors and studies Alaska's hazardous volcanoes to forecast and record eruptive activity. AVO also monitors volcanic activity in the Commonwealth of the Northern Mariana Islands.
Maps of current fire locations and perimeters in the conterminous 48 States and Alaska.
Map interface to view and download landfire data sets, receive alerts and notifications.
Volcano-alert notifications are produced by Volcano Observatory scientists based on analysis of data from monitoring networks, direct observations, and satellite sensors. They are issued for both increasing and decreasing volcanic activity and include text about the nature of the unrest or eruption and about potential or current hazards and likely outcomes.
The Volcano Notification Service (VNS) is a free service that sends you notification emails about volcanic activity happening at U.S. monitored volcanoes. You can customize the VNS to deliver notifications for certain volcanoes or a range of volcanoes, and you can also choose the notification types you want to receive.
Geoinformatics in the public service: building a cyberinfrastructure across the geological surveys
Advanced information technology infrastructure is increasingly being employed in the Earth sciences to provide researchers with efficient access to massive central databases and to integrate diversely formatted information from a variety of sources. These geoinformatics initiatives enable manipulation, modeling and visualization of data in a...Keller, G. Randy; Baru, Chaitanya; Allison, M. Lee; Gundersen, Linda C.; Richard, Stephen M.
Temporal variations in Global Seismic Stations ambient noise power levels
Recent concerns about time-dependent response changes in broadband seismometers have motivated the need for methods to monitor sensor health at Global Seismographic Network (GSN) stations. We present two new methods for monitoring temporal changes in data quality and instrument response transfer functions that are independent of Earth seismic...Ringler, A.T.; Gee, L.S.; Hutt, C.R.; McNamara, D.E.
OMG earthquake! can twitter improve earthquake response?
[No abstract available]Earle, P.; Guy, M.; Buckmaster, R.; Ostrum, C.; Horvath, S.; Vaughan, A.
Natural Hazards - A National Threat
The USGS Role in Reducing Disaster Losses -- In the United States each year, natural hazards cause hundreds of deaths and cost billions of dollars in disaster aid, disruption of commerce, and destruction of homes and critical infrastructure. Although the number of lives lost to natural hazards each year generally has declined, the economic cost...Geological Survey, U.S.
A deep reef in deep trouble
The well-documented degradation of shallower reefs which are often closer to land and more vulnerable to pollution, sewage and other human-related stressors has led to the suggestion that deeper, more remote offshore reefs could possibly serve as sources of coral and fish larvae to replenish the shallower reefs. Yet, the distribution, status, and...Menza, Charles; Kendall, M.; Rogers, C.; Miller, J.
Hurricanes 2004: An overview of their characteristics and coastal change
Four hurricanes battered the state of Florida during 2004, the most affecting any state since Texas endured four in 1884. Each of the storms changed the coast differently. Average shoreline change within the right front quadrant of hurricane force winds varied from 1 m of shoreline advance to 20 m of retreat, whereas average sand volume change...Sallenger, Asbury H.; Stockdon, Hilary; Fauver, Laura A.; Hansen, Mark; Thompson, David; Wright, C. Wayne; Lillycrop, Jeff
Experimental Investigations Regarding the Use of Sand as an Inhibitor of Air Convection in Deep Seismic Boreholes
INTRODUCTION Tilt has been the nemesis of horizontal long period seismology since its inception. Modern horizontal long period seismometers with their long natural periods are incredibly sensitive to tilt. They can sense tilts smaller than 10 -11 radians. To most readers, this is just a very very small number, so we will begin with an example...Holcomb, L. Gary; Sandoval, Leo; Hutt, Bob
Taking the Earth's pulse
During the past 35 years, scientists have developed a vast network of seismometers that record earthquakes, volcanic eruptions, and nuclear explosions throughout the world. Seismographic data support disaster response, scientific research, and global security. With this network, the United States maintains world leadership in monitoring the...Woodward, Robert L.; Benz, Harly M.; Brown, William M.
Observations and Modeling of Seismic Background Noise
INTRODUCTION The preparation of this report had two purposes. One was to present a catalog of seismic background noise spectra obtained from a worldwide network of seismograph stations. The other purpose was to refine and document models of seismic background noise that have been in use for several years. The second objective was, in...Peterson, Jon R.
An Evaluation of Installation Methods for STS-1 Seismometers
INTRODUCTION This report documents the results of a series of experiments conducted by the authors at the Albuquerque Seismological Laboratory (ASl) during the spring and summer of 1991; the object of these experiments was to obtain and document quantitative performance comparisons of three methods of installing STS-1 seismometers....Holcomb, L. Gary; Hutt, Charles R.
A C Language Implementation of the SRO (Murdock) Detector/Analyzer
A signal detector and analyzer algorithm was described by Murdock and Hutt in 1983. The algorithm emulates the performance of a human interpreter of seismograms. It estimates the signal onset, the direction of onset (positive or negative), the quality of these determinations, the period and amplitude of the signal, and the background noise at the...Murdock, James N.; Halbert, Scott E.
A Numerical Study of Some Potential Sources of Error in Side-by-Side Seismometer Evaluations
INTRODUCTION This report presents the results of a series of computer simulations of potential errors in test data, which might be obtained when conducting side-by-side comparisons of seismometers. These results can be used as guides in estimating potential sources and magnitudes of errors one might expect when analyzing real test data....Holcomb, L. Gary
Editor’s note: this news release will be updated online with more information on the streamgage records being set in Florida as it becomes available
To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Maria, visit the USGS Hurricane Maria page at https://www.usgs.gov/maria.
Just after Labor Day, U.S. Geological Survey field crews began digging a trench within the Jackson Hole Mountain Resort ski area, on the lower reaches of Buffalo Bowl.
To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page at https://www.usgs.gov/harvey.
Hurricane Irma’s heavy rains and storm surge caused severe flooding in parts of the Southeast.
When a major storm is on the horizon, the USGS uses its water monitoring, coastal change, mapping, and modeling expertise to help prepare for, respond to, and recover from hurricanes and tropical storms.
Editor’s note: this news release will be updated online with more information on the streamgage records being set in Texas as it becomes available.
Rivers and streams reached record levels as a result of Hurricane Harvey’s rainfall, with about 40 U.S. Geological Survey streamgages measuring record peaks.
As Harvey’s record breaking rainfall and catastrophic flood waters recede in Texas and western Louisiana, U.S. Geological Survey teams are collecting high water marks, monitoring water levels and coastal change, retrieving storm tide sensors and collecting samples for water quality analysis.
A magnitude 8.1earthquake struck offshore Chiapas, Mexico on September 7, 2017 at 11:49 local time (September 8 at 04:49UTC).