[Shake-dev] How we got the final PGA/PGV or Intensity

[Bruce Worden]

Hi,

The method used to interpolate ground motions to generate ShakeMaps  
has changed over the past year or so. The new method is described in  
an upcoming issue of BSSA. We expect the articleto appear  in the  
December 2010 issue, which should be out any day now. The title is "A  
Revised Interpolation Scheme for ShakeMap."

In the meantime, the original reference for ShakeMap is Wald et al.,  
"TriNet 'ShakeMaps': Rapid Generation of Peak Ground Motion and  
Intensity Maps for Earthquakes in Southern California", Earthquake  
Spectra, Volume 15, No. 3, August 1999.

There have been some additional references since then, but that paper  
describes the basic methodology of the original system. You may also  
be interested in:

Wald, D.J., Worden, B.C., Quitoriano, Vincent, and Pankow, K.L., 2005,  
ShakeMap manual: technical manual, user’s guide, and software guide:  
U.S. Geological Survey Techniques and Methods, book 12, section A,  
chap. 1, 132 p.

It is available at: http://pubs.usgs.gov/tm/2005/12A01/

It is a bit out of date at this point, but still contains a lot of  
useful information not found in the software guide.

Bruce


On Nov 30, 2010, at 9:35 PM, 成 wrote:

> Hi,
> I want to know the process sequence of grind,like how we get the  
> final PGA/PGV or Intensities from the data I give it in the  
> *_dat.xml files. I just want to know the main steps in the  
> procedure,such as PGA/PGAV(observations)-->??--??--??-->final PGA/ 
> PGV (or Intensity).
> In the ShakeMap Manual,we first create a coarse grid in 30m,then  
> interplote in 1.5km more or less then we obtain the final  
> PGA(intensity) after a few  steps.Now in ShakeMap V3.5,how should we  
> do?
> Does anyone have the documents about the procedure or sth like  
> ShakeMap Manual except the releasenotes in the distribution?
>
> Thanks,
> WSC
>
> ------------------
> send from gilliant at qq.com
>
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