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9, but I would quibble with Credo Reference! Druid Send a noteboard - 22/04/2010 04:25:08 AM
(1. A scale for expressing the magnitude of earthquakes, named after an American seismologist (first name Charles). The scale ranges from 0 to 10.

Richter scale.


Having very good reason to know both earthquake scales (not knowing them cost me money) I would like to point out that the Richter scale is both logarithmic and open-ended. It does not stop at 10.

A 10 would be cataclysmic, but when the San Andreas finally lets go and the land to the west drops under the Pacific, it will likely be more than a 10. The recent Chilean earthquake, at around an 8 was equivalent to the explosion of a billion tonnes of TNT. A 10 would be a trillion tonnes.

The old Mercalli scale used to stop at ten, but some Californians added eleven and twelve. 'Cos they understood.
*MySmiley* Druid *MySmiley*



Object of Desire (retired)

The Peoples Front For Nebhead Appreciation

I blame Jake
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