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
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.