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Earthquakes
Ground shaking caused by the sudden release of accumulated strain by an abrupt shift of rock along a fracture in the earth or by volcanic or magmatic activity, or other sudden stress changes in the earth.
Subtopics:
Earthquake occurrences (41 items)

Earthquake hazards (27 items)
Related topics:
Results 1 - 66 of 66 listed by similarity [list alphabetically]
Earthquake Hazards Program [New Window]
Information on earthquake activity, earthquake science, and earthquake hazard reduction with links to news reports, products and services, educational resources for teachers, glossary, and current U.S. earthquake activity map.
Earthquakes: Frequently Asked Questions [New Window]
Answers to a wide variety of questions (FAQs) about earthquakes, such as dictionary of terms, earthquake activity and probabilities, common myths, faults, plate tectonics, and earthquake measurement techniques.
Earthquake information by topic [New Window]
Information on earthquakes by topic including faults, tsunami, seismic waves, and plate tectonics.
Earthquake information by region [New Window]
Information on earthquake activity, maps, lists of significant earthquakes, earthquake preparedness, and earthquake research arranged by region.
Earthquake preparedness information [New Window]
Links to web sites, publications, and fact sheets on earthquake preparedness.
Earthquake search [New Window]
Search interface allowing searches of earthquake databases by various parameters including date, depth, intensity, area, and magnitude and download data in a variety of formats.
Earthquake hazard maps [New Window]
National seismic hazards maps, global seismic hazards map, predictive intensity maps, shaking hazards maps and probabilities for California, and a variety of fact sheets on earthquakes.
Earthquake: Did you feel it? Report it here. [New Window]
Place to provide information about ground shaking associated with significant earthquakes. A questionnaire to let us know what you felt following an earthquake in the United States or in other countries.
Earthquakes for kids [New Window]
Links to various earthquake projects, facts, science fair ideas, earthquake science, becoming an earthquake scientist, image glossary, earthquake facts, and puzzles and games for children.
Earthquake glossary [New Window]
Dictionary of terms associated with earthquakes with simple definitions and photographs especially suited for students.
Earthquake "Top 10" Lists & Maps [New Window]
Lists of largest earthquakes in the world and in the United States, earthquake facts and statistics, deaths from earthquakes, earthquakes by magnitude, and significant earthquakes.
Historical earthquakes: lists and statistics [New Window]
Lists and maps of historic earthquakes by geographic area, magnitude, destructiveness, and other characteristics.
ShakeMap [New Window]
ShakeMap sites provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.
Fault and fold database of the United States [New Window]
Online database of faults and associated folds in the United States that are believed to be sources of significant earthquakes during the last 1.6 million years.
Earthquake and fault data for Google Earth [New Window]
Downloadable data for earthquakes and faults for use with the Google Earth software
Real-time seismogram displays [New Window]
Description of seismograms and how they are produced by drum recorders and electronic instruments with real-time seismograms for Northern California and Long Valley, California and representative seismograms for types of earthquake activity.
This dynamic planet: World map of volcanoes, earthquakes, impact craters, and plate tectonics [New Window]
Online world map with booklet (PDF format) giving an account of plate tectonics, volcanology, earthquake activity, and impact craters.
This dynamic Earth: the story of plate tectonics [New Window]
Online booklet giving an introduction to the concept of plate tectonics and complements the information on the map This Dynamic Planet published in 1994 by the U.S. Geological Survey (USGS) and the Smithsonian Institution.
Earthquakes [New Window]
Online booklet on earthquake history, earthquake occurrences, measuring earthquakes, causes, relationship of volcanoes and earthquakes and earthquake prediction.
Earthquake Geology and Paleoseismology [New Window]
Geological effects of earthquakes on the crust and landscape, with studies of prehistoric earthquake activity using geological evidence.
Earthquake Hazards 101 [New Window]
Provides links to explanatory materials for the layperson, including information on concepts behind earthquake maps, the use of probability, what the maps mean, how they are made, and answers to frequently asked questions.
Earthquake Hazards 201 - Technical Information [New Window]
Provides detailed technical information on earthquake hazards in the form of frequently asked questions. Desisigned for the technical audience, including building and safety planners.
Earthquake Hazards Program - Central and Eastern U.S. [New Window]
Information on earthquakes in central and eastern United States with links to earthquake monitoring, published products, recent earthquake information, discussion group, and current projects.
Earthquake Hazards Program - Northern California [New Window]
Home page for Northern California Earthquake Hazards Program with links to earthquake news, real-time earthquake and shaking maps, earthquake probabilities, latest earthquake information, hazards and preparedness, research and special features.
Earthquake Hazards Program - Southern California [New Window]
Site for the Southern California Earthquake Hazards Program with links to latest quake information, real-time earthquake maps and shaking maps, general information, hazards and preparedness, research, networks, and earthquakes for kids.
Earthquake Hazards Program external research support [New Window]
Abstracts, program announcements and descriptions of projects funded by the external research program.
Earthquake Products & Publications [New Window]
Long list of online fact sheets, publications, and maps relevant to earthquake studies.
Earthquake hazards software for download [New Window]
Numerous downloadable software packages for carrying out analyses, modeling, and ancillary calculations in earthquake research and monitoring.
Earthquake science explained--a series of ten short articles for students, teachers, and families [New Window]
Collects a series of short articles on earthquake science and related topics for students, teachers, and parents originally published as weekly features in The San Francisco Chronicle.
Earthquakes and tsunamis in Puerto Rico and the U.S. Virgin Islands [New Window]
Fact sheet on hazards from earthquakes and tsunamis in Puerto Rico and the U.S. Virgin Islands to be downloaded as a PDF file or viewed as an Adobe Acrobat Reader file.
Central California /San Francisco Bay Earthquake Hazards Project [New Window]
Information on earthquakes in central California and the San Francisco region with links to four types of field studies, deep seismic investigations, geotechnical investigations, shallow seismic imaging, and airborne geophysical surveys.
General Earthquake Observation System (GEOS) [New Window]
Earthquake and aftershock data collected by the USGS General Earthquake Observation System project in Menlo Park, California.
Glacier effects of the M7.9 Denali fault earthquake of November 3, 2002 [New Window]
Description and photos documenting offsets and 260 km rupture in the Denali glacier in central Alaska after the November 3, 2002 earthquake, the 9th largest earthquake in the United States in the last 200 years.
Hawaiian Volcano Observatory (HVO) earthquakes: HVO seismic network [New Window]
Description of the seismic monitoring of the active Hawaiian volcanoes with information on the network, instrumentation, and recording stations with links to related information.
Latest earthquakes in the USA - Past 7 days [New Window]
Real-time earthquake maps of the conterminous U.S., Alaska, Hawaii, and Puerto Rico displaying magnitude and location of earthquake activity in the past hour, past day, and past week.
Latest worldwide earthquakes [New Window]
Near real-time list of earthquakes recently occurring anywhere in the world.
Maps of recent earthquake activity in California-Nevada [New Window]
Near-real-time maps of location, ground motion, and shaking intensity of earthquakes in California and Nevada for the past hour, past day, and past week and links to other earthquake information.
National Earthquake Information Center [New Window]
Information on world earthquake activity with links to facts and lists on large earthquakes, earthquake e-mail notification, hazards and preparedness, educational links, news and highlights and other seismic information.
Natural Hazards - Earthquakes [New Window]
News and related information focusing on the importance of earthquake hazards in the United States.
Recent earthquakes in Hawaii [New Window]
Interactive maps of earthquakes of last 2 hours, last 2 days, and last 2 weeks in Hawaii.
Severity of an earthquake [New Window]
Description of intensity and magnitude as indicators of the size of an earthquake and the levels of severity measured on the Richter Magnitude Scale and the Modified Mercalli Intensity Scale.
The Parkfield Experiment - capturing what happens in an earthquake [New Window]
Fact sheet describing plans for a San Andreas Fault Observatory at Depth (SAFOD) by drilling into the fault to install instruments for long-term monitoring near the location of the magnitude 6 Parkfield earthquakes.
The great 1906 earthquake, 100 years later [New Window]
Annotated list of resources about the great earthquake of 1906, which caused significant devastation in and around San Francisco, California, compiled for the 100th anniversary of the disaster.
Tsunamis & earthquakes [New Window]
Homepage for tsunami research with links to information and images on basics, tsunamis in the Pacific Northwest, the 1998 Papua New Guinea tsunami, research on specific tsunamis, and animations in various formats.
Geologic hazards team office [New Window]
An organizational unit within USGS that studies earthquakes, landslides, and geomagnetism. Contact information and descriptions of current research projects.
Natural Hazards Gateway [New Window]
News and related information about the importance of seven major types of natural hazards in the United States: earthquakes, floods, wildfires, hurricanes, landslides, volcanoes, and tsunamis.
Volcano Hazards Program, Long Valley Observatory [New Window]
Overview of the Long Valley Caldera with links to monitoring data including earthquakes and deformations, long-term outlook, volcano hazards in the area, USGS response plan, image gallery, monitoring and topical studies, publications and references.
PDF A volcano rekindled; the renewed eruption of Mount St. Helens, 2004-2006 [New Window]
ANSS - Advanced National Seismic System [New Window]
Nationa network of seismic monitoring stations coordinated with a variety of regional organizations and academic institutions.
Advanced National Seismic System (seismic network) [New Window]
A program of studies with instruments to provide accurate and timely data and information on seismic events, including their effects on buildings and structures, employing modern monitoring methods and technologies.
Advanced National Seismic System: Products and services [New Window]
Maps, data, and services provided to help people understand earthquakes that have occurred.
Albuquerque Seismological Lab [New Window]
The USGS Seismological Laboratory in Albuquerque installs and maintains a world network of seismograph stations, collects the seismic data, and evaluates seismic instruments. Site includes links to ASL publications, earthquake maps and seismic data.
Earth science photographic archive [New Window]
Photographic archive collection from the USGS Photo Library. Photos dated 1868-1992 are of geology, earthquake damage, national parks, pioneer photographers, St. Helens eruption and mining and available at 100, 700 and 1400 dots/inch resolution.
Executive summary, workshop: seismic and tsunami hazard in Puerto Rico and the Virgin Islands [New Window]
Summary of workshop with links to reports that are recommendations for future projects.
Global Seismographic Network [New Window]
Worldwide network of seismic monitoring stations coordinated by a variety of national and international organizations.
Major quake likely to strike San Francisco Bay Region between 2003 and 2032 [New Window]
Study of the probability of a major earthquake in San Francisco Bay region with colored map and links to relevant publications. Text also available in PDF format and graphic available in Illustrator or Photoshop format.
Mauna Loa current activity [New Window]
Current activity of Mauna Loa Volcano with news, GPS data, electronic tiltmeter data, and current seismicity plus links to long term monitoring.
Monitoring data of the Long Valley caldera and Mono-Inyo Craters volcanic chain, California [New Window]
Describes the monitoring effort and provides real-time data of the current restless activity of the caldera, including earthquakes, ground deformation, and release of volcanic gas and plus link to volcano monitoring techniques.
Puget lowland paleoseismology [New Window]
Homepage for a paleoseismic field study of the geologic record of prehistoric earthquakes in the Puget Lowland region to evaluate seismic hazards with links to an atlas and reports on historic earthquakes in the Washington and Oregon area.
San Andreas Fault [New Window]
Online booklet on the San Andreas fault system on the California coastal region with discussion of faults, relationship of faults and earthquakes, magnitude of earthquakes, and earthquake probability.
Southern California Integrated GPS Network (SCIGN) [New Window]
Homepage for the Southern California Integrated GPS Network (SCIGN) Pasadena Field Office involved in operating GPS stations, data recording, and supplying of earthquake data. Links to GPS data analysis, photos, and technical information.
The U.S. Geological Survey Ocean Bottom Seismometer Facility [New Window]
The Ocean Bottom Seismometer facility provides technical support for a variety of scientific investigations ranging from deep crustal structure to gas hydrate and surface sediments.
United States National Strong-Motion Program (NSMP) [New Window]
National Strong-Motion Program home page with links to program news, recent events, and datasets of digitized accelerograms downloadable as PC (*.zip) and Unix (*.tar.z) files, data processing, stations, research, publications, and personnel.
Volcano monitoring at Yellowstone National Park [New Window]
Describes volcano monitoring at Yellowstone National Park including an update of recent volcanic activity, real-time data, and link to volcano monitoring techniques information.
Western Region geologic information [New Window]
Links to geologic information on western states: Alaska, Arizona, California, Hawaii, Idaho, Nevada and Oregon including information on coastal and marine geology, mineral resources, earthquakes, landslides, earthquake hazards and geologic maps.
What is an Ocean Bottom Seismometer? [New Window]
Description and uses of the Ocean Bottom Seismometer; a self contained data-acquisition system which free falls to the ocean floor and records seismic data generated by airguns and earthquakes.


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