[Shake-admin] shakemap comment from don sorben

[Bruce Worden]

Hi Don,

The approach you suggest will not give displacements.  The correct  
approach would be to integrate the velocity time series (or, in the  
case of acceleration time series, integrate twice).  This process  
will yield a displacement time series.  Time series data for southern  
California earthquakes can be obtained from the Southern California  
Earthquake Data Center: http://www.data.scec.org/

If you are interested in static displacements, the SCIGN Data Portal  
would be a good place to start: http://reason.scign.org/ 
scignDataPortal/  While their focus has been on long-term strain  
rates, I know they have produced maps of co-seismic deformation, as  
well.

Good luck,
Bruce Worden
USGS, Pasadena


On Jun 4, 2007, at 7:33 AM, don sorben wrote:

>
> I would like to be able to determine the actual amount of ground  
> movement during an earthquake. Can I get an estimate using the  
> formula:
>
> S = V^2 / (2a)
>
> Where S = distance moved
>               V = peak velocity
>               a = peak acceleration
>
>
>
> submitted by: don sorben, , 858.278-8897, dsorben at san.rr.com
> refered by http://earthquake.usgs.gov/eqcenter/shakemap/sc/shake/ 
> comment_form.php
>
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