Earthquakes

Welcome to Poorna's Pages at the Glendale Community College. You are visiting the "Earthquake" page where we examine what the earthquakes really are, where they commonly occur, and what our observations really tell us about them.

 

 

 

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Poorna's Outlines   USGS Online books: EARTHQUAKES  SAN ANDREAS FAULT  Savage Earth Online   Current World Seismicity   Current California Seismicity    1975-95 World Seismicity    Earthquake Questions-and-Answers    Earthquake Links
 

 

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Updated on 05/05/2015

 

 

 

Earthquakes: 

photograph of 1906 San Francisco earthquake and fire

Heard of earth-quake weather?

Try this site or click here to learn more.

Poorna's Outlines:

You may need to download the Adobe Acrobat Reader to view these files

Click on the above image to read the USGS Online Publication EARTHQUAKES by Kaye M. Shedlock & Louis C. Pakiser available at the following URLhttp://pubs.usgs.gov/gip/earthq1/

 

 

 

Explore
SAVAGE EARTH Online for

 

Try some general earthquake links at the
URL:
http://www.whfreeman.com/bolt/con_index.htm?99wbs,
an online companion to
"Earthquakes" by Bruce A. Bolt"
(W.H. Freeman & Co.)

  Click on the picture of San Andreas
Fault on the right to read the USGS on-line publication, 'The San Andreas Fault', by Sandra Schulz and Robert Wallace.
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Click on the world map below to access the USGS Web site on current world seismicity.

 

Click on this map below to learn about current Southern California seismicity

 

Click on this map below to access the data on 1975-95 worldwide seismicity:

Elastic Rebound Animation              

 

Earthquakes are the result of forces deep within the Earth's interior that continuously affect the surface of the Earth. The energy from these forces is stored in a variety of ways within the rocks. When this energy is released suddenly, for example by shearing movements along faults in the crust of the Earth, an earthquake results. The severity of an earthquake can be expressed in terms of both intensity and magnitude. However, the two terms are quite different, and they are often confused

 

References/Links to Web sites on Earthquakes:

  • Caltech Seismological Laboratory. The Caltech Seismo Lab's Earthquake Information page has a number of resources, including

    • TriNet Data Viewer. An interactive application to view seismograms (in record-section format) recorded at stations in California from the latest worldwide or local earthquakes.

    • Record of the Day. Information, seismograms, map, and focal mechanism of the most recent worldwide or local large earthquake. Also: Previous Records of the Day, a clickable map of the five most recent Records of the Day.

    • Recent Earthquake Info. Up-to-date information on recent earthquake activity (time, location, magnitude) in certain areas, or worldwide

  • USGS Pasadena Earthquake Information. A comprehensive site, with current California earthquake information, earthquake commentary, GPS monitoring, ground motion shake maps, and a very complete list of links to other important earthquake sites on the web.

  • USGS National Seismic Hazard Mapping Project. Hazard maps for the United States; answers to frequently asked questions; current earthquake information; damage photos, and more.

  • The Great Globe Gallery. More than 200 global maps of the Earth, including crustal boundaries, earthquake centers, volcanic eruptions, the Pacific Ring of Fire, plate tectonics, world seismicity, and more.

  • Searchable Database of Earthquake Photos. From the National Information Service for Earthquake Engineering at UC Berkeley. Search for photographs of damage from the earthquakes discussed in the textbook. Note: Search will return "no results" unless you specify the location first (e.g., "Alaska 1964") rather than the date first (e.g., "1964 Alaska"). There is also an alphabetical list of earthquakes with images in the database.

  • Map of Recent Earthquakes in California and Nevada. Produced by the Southern California Seismographic Network, a joint project of the USGS and Caltech.

  • A Decade of Notable California Earthquakes. Includes maps, photographs, and information about each quake. There is also a map of potential future earthquakes for the next five years.

  • University of Washington Seismology and Earthquake Information. Catalogs and maps of recent earthquakes in the Pacific Northwest, the United States, and worldwide.

  • Redwood City Public Seismic Network. Many resources for amateur seismologists, including a map of Public Seismic Network stations worldwide, earthquake data files, software to calculate bearing and distance, and links to other useful sites.

  • Southern California Earthquake Center. Extensive resources, including a map of the latest California earthquakes and a Seismicity Viewer that allows you to view animations of Southern California seismicity by month.

  • ABAG Earthquake Maps and Information. Association of Bay Area Governments. Ground shaking hazard maps and animation for Bay Area cities, liquefaction hazards, mitigation techniques, and more.

  • Canadian National Earthquake Hazards Program. This site covers seismic events in Canada. Includes lists and maps of recent earthquakes in Canada, reports on significant recent earthquakes, articles on earthquakes in western and eastern Canada, questions and answers about earthquakes, and information about earthquake hazards.

  • Earthquake Information. Australian Geological Survey Organisation (AGSO). This site has reports on recent Australian earthquakes, earthquake and seismic monitoring station maps, and an earthquake slide set.

  • Earthquake Engineering Research Institute. The EERI is a national, nonprofit technical society of engineers, geoscientists, architects, planners, public officials, and social scientists. The Institute is best known for its field investigations and reconnaissance reports detailing the effects of destructive earthquakes. EERI's web site includes news, earthquake reports, earthquake links, and more. The society offers slide sets for a number of earthquakes, and sample images can be viewed online. Good coverage of earthquakes outside the United States.

  • The Restless Planet: Earthquakes. From Savage Earth Online, a web site to accompany the PBS television series. Excellent illustrations, animations, and videos.

  • Virtual Earthquake is an interactive Web-based program designed to introduce you to the concepts of how an earthquake epicenter is located and how the Richter magnitude of an earthquake is determined. California State University at Los Angeles.

  • Earthquakes. The Tech Museum of Innovation. A well-illustrated, comprehensive introduction to earthquakes. Covers plate tectonics, seismographs, faults, the propagation of earthquake waves, earthquakes in history, earthquake safety, and much more.

  • Earthquakes. USGS publication. Covers earthquakes in history, where earthquakes occur, how earthquakes happen, measuring earthquakes, volcanoes and earthquakes, and predicting earthquakes.

  • Earthquakes. Southern California Integrated GPS Network Education Module. A good introduction to earthquakes with information on the different kinds of earthquakes, their causes, detection and measurement, and more. A Shockwave plugin is needed to view the animated illustrations.

  • Earthquake Information at Humboldt State University. Includes a wide variety of resources on the earthquakes of northern California: lists and maps of recent earthquakes, basic information on earthquakes and plate tectonics, information on living with earthquakes, data about tsunamis for those living along the coast, and links to other earthquake information centers on the web.

  • Understanding Earthquakes. University of California at Santa Barbara. Includes Java animations of earthquake locations on a rotating globe and how earthquakes occur, historical accounts of famous earthquakes, a short history of seismology before 1910, and an earthquake quiz.

  • The San Andreas Fault. USGS publication. Covers what it is, where it is, its surface features, and the earthquakes that have occurred along it.

  • Susan Rosenberg's Quaking Home Page. A comprehensive site including maps of current earthquake activity; relief maps of the world, California, and the East Pacific Rise; "a decade of notable California earthquakes"; historical earthquake maps and links; and links to worldwide earthquake resources.

  • Earthquake Information Network (EQNet) is maintained by a consortium of national, regional, and state organizations working to share earthquake-related information and promote earthquake safety. The purpose of EQNET is to provide access to a comprehensive and up-to-date list of Internet resources about earthquakes and the issues surrounding them.

  • Nevada Seismological Laboratory. University of Nevada at Reno. Lists and maps of seismic events in Nevada, other earthquake information.

  • Southern Arizona Seismic Observatory (SASO) University of Arizona. Make Your Own Seismogram, Seismograms of the Day (or Week, or Month), top ten list of recent major earthquakes, plate tectonic map, question-and-answer page.

  • University of Utah Seismograph Stations. Information about recent seismic events in Utah, Wyoming, Idaho, and Montana, as well as information and maps about the geologically active faults in Utah, Yellowstone Park, and the Intermountain West.

  • St. Louis University Earthquake Center. Information about earthquakes along the New Madrid fault in the central United States; photographs from historically important earthquakes.

  • Earthquakes and Seismic Risk in Ohio. Ohio Department of Natural Resources.

  • Earthquakes in Indiana. Indiana Geological Survey.

  • Earthquakes and Maryland. Maryland Department of Natural Resources.

 

           05/05/15