[time-nuts] OT: NZ Christchurch member
jimlux
jimlux at earthlink.net
Fri Feb 25 03:56:35 UTC 2011
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.
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