Hi J=F3n,

To get better resolution in time, change the time=20
window (x scale) to 40 seconds.

Then use the Display/Modify system to enter the=20
known location, origin time, and magnitude from=20
the Iceland network (http://hraun.vedur.is/ja/englishweb/eqlist.html).

Click on the Loc button and the P and S markers=20
will be positioned automatically.  When I did=20
this they were close to the start of the phases,=20
but a one or two seconds late.  This could mean=20
that your clock is a few seconds fast, or that=20
the velocity model does not fit exactly for Iceland.

When I position the P and S markers, the implied=20
distance is 162 km, whereas the computed distance=20
is 166 km.  This is pretty close.

I think you recorded the 3.4 event rather than=20
the 3.0 event, but it can be hard to untangle=20
events that are this close together in space and time.
20=
06-01-1000:25:26,563,964-21,8541,13,490,03=20
5,1 kmSof Helgafell
20=
06-01-1000:25:24,963,955-22,1133,23,090,05=20
7,9 kmNNWof Kr=EDsuv=EDk


I posted my WinQuake windows showing the way I would pick this earthquake=
 here:
http://jclahr.com/science/psn/misc/jon.html

Cheers,
John
At 09:53 AM 1/10/2006, you wrote:
>Hi all
>
>As I did say in my early post today, I did record a earthquake at 00:25
>today. The earthquake mag was 3,0 on the ricther scale according to the
>icelandic met office. My problem is this that i don't think i have found
>the p and s wave properly, since this earthquake wave has two spikes,
>not one. I did think that i had correctly located the p and s waves, but
>based on the wave form I am not totally sure.
>
>Here is the gif file and the psn file of the recording.
>http://www.simnet.is/jonfr500/earthquake/winquake/060110.002424.ch1.psn.gif
>http://www.simnet.is/jonfr500/earthquake/winquake/060110.002424.ch1.psn
>(p and s markers are not set in this psn file)
>
>Here is a picture of the earthquake with the p and s markers as i did
>set them.
>http://alvaran.com/forum/index.php?act=3DAttach&type=3Dpost&id=3D11
>
>If nothing else, I welcome suggestions on this matter.
>
>Regards.
>--
>J=F3n Fr=EDmann J=F3nsson
>http://www.jonfr.com
>
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