Hi Bob,

A spike is a spike in the eye of the beholder.  There is nothing 
automatic or analytical in the program.  I just look at the data in 
Winquake, and if there are obvious transients that I want to get rid of 
the tool gives me a convenient way to zero them out.  Most of the 
transients I want to eliminate are caused by my wife walking into the 
room directly above my sensor.  The result is a very large walk-up 
transient.  Since she only goes in there to feed the cat, I call these 
events "catastrophies".  There isn't any doubt about their legetimacy.

Larry


Bob Hancock wrote:
> Sounds nice, but what is the logic that you are using to determine it is 
> a "spike" and not a seismic wave?  In addition a "spike" may be 
> simultaneous with a seismic wave, how does the logic make a separation?
> 
> Bob Hancock
> 
> 
> On Jun 3, 2009, at 7:40 AM, Larry Conklin wrote:
> 
>> A couple of weeks ago, someone asked whether there was a convenient 
>> way to edit spurious spikes out of an event data file.  Since I have 
>> the same problem, I decided to write a simple little program for 
>> editing PSNTYPE4 event data files.  The program prompts for the start 
>> and end times of the segment you want to edit and replaces the 
>> offending data samples with zeros.  Not very fancy, but it works.  If 
>> anyone would like a copy of the tool and/or the source code, I would 
>> be happy to send it to you.
>>
>> Larry Conklin
>> Liverpool, NY
>> lconklin@............
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