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→Richter magnitudes: source reference "GNSScience1" - dead link - added archived link details |
→Richter magnitudes: table - magnitude 9.0–9.9 - frequency - changed from "One per 0 to 40 years" to "One to three per century" with source reference "McCaffrey2008" (edited with ProveIt) |
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|One per year
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|9.
|rowspawn"1"|Extreme
|Near total destruction – severe damage or collapse to all buildings. Heavy damage and shaking extend to distant locations. Permanent changes in ground topography.
|One to three per century<ref name="McCaffrey2008">{{cite journal | title=Global frequency of magnitude 9 earthquakes | first=R. | last=McCaffrey | journal=Geology | date=2008 | volume=36 | issue=3 | pages=263–266 | doi=10.1130/G24402A.1}}</ref>
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