[time-nuts] OT: NZ Christchurch member

[jimlux]

On 2/24/11 5:23 PM, Bob Bownes wrote:
> What is the conversion factor for Richter to dBm? :)
>
> Bob
> As a guy with degrees in geology and EE. I really should know this...:)
>
>

Especially since both are log scales..

The problem is that Richter is log magnitude displacement on a 
particular kind of seismometer (which is sort of a low pass filter) and 
dBm is log power.  However, there should be some sort of scale factor 
that converts it.

I think it's energy goes as amplitude^1.5.  there's also a scale factor 
for how far the seismograph is from the epicenter.