Regarding log Normal distribution & response spectra for earthquake 2

[RK Sriwastav]

Why do we use log normal distributions for calculation of mean and other percentile response spectra ?

How do we know the a data will fit which distribution ?

How can we obtain percentile value for log normal distribution ?

Ravi K

 

[rb1957]

presumably "someone" did some research ?

another day in paradise, or is paradise one day closer ?

 

[IRstuff]

As exemplified by the first hit for "earthquake log normal"

https://link.springer.com/article/10.1007/BF00878907

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

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[ChadV]

The attached file is a good intro to statistics used for seismic. Page 6 (actually page 12 of the PDF) has a nice little aside-box answering the question of why the lognormal distribution is used. I hope this helps!

 

[dik]

IRS:
if you do a google search for the title and 'pdf' you can find the paper.

Dik

 

[dik]

ChadV:

Excellent introduction...

Dik