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Q: earthquakes ( Answered,   0 Comments )
Subject: earthquakes
Category: Science > Social Sciences
Asked by: daisy001-ga
List Price: $2.00
Posted: 27 Apr 2005 13:38 PDT
Expires: 27 May 2005 13:38 PDT
Question ID: 515034
the richter scale is logarithmic, meaning that each increase of 1 on
the richter scale corresponds to an increase of 10 in the amplitude of
the seismic waves created by an earthquake.  An earthquake that
measures 8 on the Richter scale has how many times more ground-shaking
than a quake that measures 6 on the richter scale?
Subject: Re: earthquakes
Answered By: denco-ga on 27 Apr 2005 16:43 PDT
Howdy daisy001-ga,

The Argonne National Laboratory Division of Educational Programs, hosts
"NEWTON," which is an "electronic community for Science, Math, and Computer
Science K-12 Educators."  They have a brief, but nice, explanation of the
Richter scale.

"For example, a magnitude 6 earthquake will produce ten times the ground
motion that a magntidue 5 earthquake will produce, but ten times less
ground motion than a magnitude 7 earthquake. The amount of energy released
by an earthquake varies by a factor of 30 for each unit increase in the
magnitude--a magnitude 6 earthquake produces 30 times the energy of a
magnitude 5 earthquake and 30 times less energy than a magnitude 7
earthquake.  Incidentally, a magnitude 5 earthquake produces about as much
energy as the nuclear bombs dropped on Japan during World War II."

In your example, a magnitude 8 earthquake would produce 100 times (10 times
10) the ground motion of a magnitude 6 earthquake and 900 times (30 times
30) the amount of energy would be released by the magnitude 8 earthquake
than a magnitude 6 earthquake.

If you need any clarification, please feel free to ask.

Search strategy:

Google search on: "Richter scale" earthquake

Looking Forward, denco-ga - Google Answers Researcher
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