Science Ch. 8.1 and 8.2
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Created by:
tatemorrison19 on March 31, 2011
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21 terms
Terms | Definitions |
|---|---|
 magnitude | measure of strength |
| measure magnitude | ritcher scale is used to... |
| 10 | how much of an increase ocurrs on ground when the magnitude increases |
| intensity | measure of how muh the earthquake was felt by ppl and amount of damage done |
| close to epicenter | greatest intensity is located where? |
| earthquake hazard | a measurement of how likely an area is to have an earthquake |
| gap hypothesis | states that seismis gaps are likely to be where a strong earthquake will occur in future due to built up stress |
| seismis gap | area where relitively few earthquakes have occureed |
| foundation | the slab of concrete upon which te building is built |
| frame | the ''skeleton'' of a building |
| retrofitting | process of making older structures more earthquake resistant |
| mass damper | weight located at the TOP of the building |
| mass damper | moves at tp of building in response to computer controlled sensors and counteracts the movements of the building |
| active tendon system | works like a mass damper but it's at the bottom of the building |
| active tendon system | shifts a large weight at bottom of building in response to computer controlled sensors to counteract movement of building |
| base isolators | layers of rubber and steel wrapped around a lead core; acts as a shock absorber |
| base isolators | absorb seismis waves preventing them from traveling through the building |
| cross brace | Steel braces placed between floors |
| cross brace | counteract pressure that pushes and pulls at sides of building during an earthquake |
| flexible pipe | pipes designed with flexible joints that can bend and move |
| flexible pipes | prevent water lines and gas lines from breaking during an earthquake |
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