It is not unusual to get signals several seconds
in difference to the models.

Your tables should be designed
for your exact geographic location.

The models used by Winquake are most likely
a general type table.

The thing I like are those theoretical tables
built by the USGS as they relate to your position and
the earthquake in question.

Sometimes but not always. I get results almost exactly
the same as those theoretical computations.

I compare my signals with Phoenix initially.
Most always I get results consistent with
my location relative to Phoenix and
the Earthquake.

I missed this last 8.8 EQ because if my
times has not been calibrated within the last 24 hours
I simply turn off the program collecting the info
till I can get the clock set to WWV.
I use a free running modulo counter to
calibrate my times due to the fact
my WWV radio signal is horrible and I can
not afford the opportunity costs to have
a GPS calibration and I will not run
a time sharing program to collect information
like Windows.
I consider my times very good
when the clock is properly set.

Very good to me is like +/- 0.1 second.

But to the USGS its probably more like +/- 0.000000001 second.
Light travels in a vacuum (Deep Space) maybe 11.8 inches in this time.

If your times are a bit off after calibrating
and coordinating your time do not worry
about a few seconds of difference.
After all, we are Armatures and not serious scientists.

Gut Luk Comrade, :-)
geoff






----- Original Message ----- 
From: "GPayton" 
To: "PSN Network List" 
Sent: Friday, February 26, 2010 8:04 AM
Subject: Help me LEARN


> After reading many posts on the PSN Net, it is obvious that I know very 
> little as compared to MANY of you out there.   I am often embarrassed to ask 
> a question and turn to the books to try to resolve my question(s).  Even at 
> that, many time I fall short.
> 
> So!  Question:
> 
>    1)    Today's trace of the 3.1 event in Oklahoma  displays in WinQuake 
> that both the Pb & Sb were seconds BEFORE the P & S times.  To me, that 
> seems like I get a bouncing ball BEFORE I actually drop it!  What did I do 
> wrong?  Is this a matter of the "tables" being off?  Or, am I wrong in 
> assuming it is incorrect?
> 
>    2)    Another "pause" that I have when using WinQuake of any event is 
> HOW LONG to plot it.  Obviously, a local event would be short, a regional 
> would be a little longer and a teleseismic may be over an hour.  But, I was 
> wondering IF there was a rule-of-thumb time that you experienced people use?
> 
> Thanks & Best regards,
> Jerry 
>
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