PSN-L Email List Message

Subject: Re: New Guinea
From: Thomas Dick dickthomas01@.............
Date: Thu, 22 Mar 2012 12:23:25 -0500


On 3/22/2012 11:29 AM, Randall Pratt wrote:
>
> Thomas,
>
> I am at 113 degrees with the US Transportable Array stations currently 
> surrounding my location.  I also see what appears to match the 
> professional stations but when I put the event in WinQuake no phases 
> agree with what I see.  The trace appears to fall almost midway 
> between the P and S markers placed from the event report.   I note 
> that switching tables does not seem to get correct phases for me 
> either.  When I go to the USGS arrival time calculator I find that the 
> PP phase appears to be the better match.
>
>    DATE-(UTC)-TIME    LAT    LON     DEPTH MAG   Q   COMMENTS
>    2012/03/21 22:15:05   6.24S 145.96E 105.9 6.6US: NEWGUINEA, PAPUA NEW GU
>    
>   delta   azimuth (degrees clockwise from north)
>   (deg)      eq-to-station     station-to-eq
> 113.01           45.1             284.0
>   
>                   travel   arrival time
>      #  code      time(s)  dy hr mn sec
>      1  Pdiff      870.59   0 22 29 35
>      2  pPdiff     898.42   0 22 30  3
>      3  sPdiff     909.91   0 22 30 14
>      4  PKiKP     1104.49   0 22 33 29
>      5  pPKiKP    1133.39   0 22 33 58
>      6  sPKiKP    1144.64   0 22 34  9
>      7  PP        1154.78   0 22 34 19
>      8  SKPdf     1310.03   0 22 36 55
>      9  SKiKP     1310.04   0 22 36 55
>
> Randy
>
I wish I had more education in this area. I looked this morning for a 
local event to blame it on out of St. Louis U but they posted nothing. 
The first wave is more distinct on the horizontal units particularly the 
broadside and the period of the wave is about 2 seconds. The stuff I 
have infers nothing should appear before PP; yet my first peak is at 
22:29:58 which WinQuake suggests is Pdif and indicates a peak at 
22:33:56 is PKP(dif). and PP arrives about 2 seconds early according to 
WinQuake.and is almost non-existant on the E-W Lehman.

  
    
  
  
    On 3/22/2012 11:29 AM, Randall Pratt wrote:
    

Thomas,

 

I am at 113 degrees with the US Transportable Array stations currently surrounding my location.  I also see what appears to match the professional stations but when I put the event in WinQuake no phases agree with what I see.  The trace appears to fall almost midway between the P and S markers placed from the event report.   I note that switching tables does not seem to get correct phases for me either.  When I go to the USGS arrival time calculator I find that the PP phase appears to be the better match.

 

  DATE-(UTC)-TIME    LAT    LON     DEPTH MAG   Q   COMMENTS
  2012/03/21 22:15:05   6.24S 145.96E 105.9 6.6      US: NEW GUINEA, PAPUA NEW GU
  
 delta   azimuth (degrees clockwise from north)
 (deg)      eq-to-station     station-to-eq
113.01           45.1             284.0
 
                 travel   arrival time
    #  code      time(s)  dy hr mn sec
    1  Pdiff      870.59   0 22 29 35
    2  pPdiff     898.42   0 22 30  3
    3  sPdiff     909.91   0 22 30 14
    4  PKiKP     1104.49   0 22 33 29
    5  pPKiKP    1133.39   0 22 33 58
    6  sPKiKP    1144.64   0 22 34  9
    7  PP        1154.78   0 22 34 19
    8  SKPdf     1310.03   0 22 36 55
    9  SKiKP     1310.04   0 22 36 55

 

 

Randy

 

I wish I had more education in this area. I looked this morning for a local event to blame it on out of St. Louis U but they posted nothing. The first wave is more distinct on the horizontal units particularly the broadside and the period of the wave is about 2 seconds. The stuff I have infers nothing should appear before PP; yet my first peak is at 22:29:58 which WinQuake suggests is Pdif and indicates a peak at 22:33:56 is PKP(dif). and PP arrives about 2 seconds early according to WinQuake.and is almost non-existant on the E-W Lehman.

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