Coastal & Marine Geology InfoBank

Home FACS Activities Atlas Geology School Related Sites More

USGS CMG InfoBank: Artificial Earthquakes

Skip navigational links
Dictionaries: Our Mapping Systems   The USGS and Science Education   USGS Fact Sheets   Topics   Keywords   Data Dictionary   Metadata Dictionary   Computer Terminology   Digital Formats  
InfoBank Terms: Activity ID   activity overview   crew   digital data   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year  
Data Types: bathymetry   biological   geochemical   gravity   ground penetrating radar   imaging   LIDAR   logs   magnetics   metering equipment   navigation   samples   seismic   total station   definitions disclaimer  
Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon  
Comment: 06:16 - 07:22 (01:06)
Source: Annenberg/CPB Resources - Earth Revealed - 3. Earth's Interior
Keywords: "Vibra-seis truck", explosive, X-ray, "Thomas Henyey"

Our transcription: Earthquakes aren't the only source of seismic waves.
People sometimes create their own earthshaking devices.
Seismic waves can be generated artificially at the Earth's surface by explosions or by devices which pound on the Earth's surface.
The waves then transfer through the Earth.
This is very similar to X-rays.
For example, when we X-ray a human body, the X-rays, instead of being destructive to the body, are used as a source of energy which can penetrate to the interior of the body and then scatter and reflect off bones or internal organs and then can be documented on a film or some other kind of sensor.
We can then see the interior of the human body.
Similarly, we see the interior of the Earth from the information that comes back from seismic waves.

Geology School Keywords
Skip footer navigational links

Coastal and Marine Science Centers:  Pacific   St. Petersburg   Woods Hole  
InfoBank   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer  

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: InfoBank staff
Page Last Modified: Thu Oct 31 04:25:20 PDT 2013  (chd)