Richter Magnitudes
|
Earthquake Effects
|
|
Less than 3.5
|
Generally not felt, but recorded.
|
|
3.5-5.4
|
Often felt, but rarely causes damage.
|
|
Under 6.0
|
At most slight damage to well-designed buildings.
Can cause major damage to poorly constructed buildings
over small regions.
|
|
6.1-6.9
|
Can be destructive in areas up to about 100 kilometers
across where people live.
|
|
7.0-7.9
|
Major earthquake. Can cause serious damage over larger areas.
|
|
8 or greater
|
Great earthquake. Can cause serious damage in areas several
hundred kilometers across.
|