Hi Larry,

I also got this same problems. But I get thousands of small earthquakes
every year and this is same thing with most of them. The misalignment of
the P and S wave is something less then a second. But it is still there. I
am like looking for a fix, but I don't have it yet.

Regards,
Jón Frímann.

>   I recorded a couple of small events the other day, a 2.9 followed
> shortly by a 2.7, at a distance of around 200 miles.  I noticed that
> when I turn on the P and S phase marker lines in Winquake, they don't
> line up with the P and S phase markers (ie. the veritical arrows).  The
> amount of discrepancy depends on which table I select, and isn't all
> that great unless I really zoom in tight.
>
> So, two questions.  Why the difference?  And which should I use to
> estimate the distance to the event, the arrows or the phase lines?  (Not
> that it really makes much difference, since I usually have a lot of
> uncertainty where the phase onsets are anyway.)
>
> Larry Conklin
> Liverpool, NY
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