3 VIRTUAL HOUSE - Code Clue: Richter scales measure this.?

Question

Can someone please confirm if the answer was 'seismic waves'. I did not see if it accepted the code so I am unsure if I have got the code correct. When I type it in it says "Code already used". Does this mean I have already entered it and received points for this clue?

Answer 1

Richter magnitude scale

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The Richter magnitude scale, or more correctly local magnitude ML scale, assigns a single number to quantify the amount of seismic energy released by an earthquake. It is a base-10 logarithmic scale obtained by calculating the logarithm of the combined horizontal amplitude of the largest displacement from zero on a Wood–Anderson torsion seismometer output. So, for example, an earthquake that measures 5.0 on the Richter scale has a shaking amplitude 10 times larger than one that measures 4.0. The effective limit of measurement for local magnitude is about ML = 6.8.

The energy release of an earthquake, which equates to its destructive power, scales with the 3⁄2 power of the shaking amplitude. Thus, a difference in magnitude of 1.0 is equivalent to a factor of 31.6 ((101.0)(3 / 2)) in the energy released; a difference of magnitude of 2.0 is equivalent to a factor of 1000 ((102.0)(3 / 2) ) in the energy released. [1]

Answer 2

if you will put any thing with space in the box. it will say "code already used".

So always try codes without space

Answer 3

yes, if it was a wrong answer it would say invalid code

Answer 4

yea, i was really confused wth this one aswell...

But I'm pretty sure I finally got it with 'quake'..