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Full tensors solutions

Errors-To: researchcmt-bounces@geohazards.usgs.gov

USGS research CMT: maintained and developed by Jascha Polet at Cal Poly Pomona.
This is a research system and solutions are *not* official USGS earthquake magnitudes.
AUTOMATIC solution, not reviewed by a seismologist, new beta version 2/13/12
More details on this rCMT at http://neic.cr.usgs.gov/beta/rcmt/events/120922065826.C000CTX8
usr/passwd : rcmt/rcmt
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General region :  C000CTX8 TONGA                                             
surface waves  (3.0,3.5,7,7.5 mHz)
Stations used :  CTAO KIP MAJO PET PMG SNZO TAU YSS                                                                 
Origin time: 2012  266   6  58  26
Origin time reformatted: 2012-09-22 06:58:26
Original location (lat,lon,depth) : -20.8  -174.2  10             
Moment tensor (x1.e26 dyncm) :
Mrr :      0.033674 Mtt :     -0.011787
Mff :     -0.021887 Mrt :     -0.016162
Mrf :      0.006705 Mtf :     -0.016116
T-axis:  moment=     0.041   plunge=    67.261  azimuth=   208.656    
N-axis:  moment=    -0.007   plunge=    22.341  azimuth=    39.966    
P-axis:  moment=    -0.034   plunge=     4.021  azimuth=   308.311    
best double couple: Mo=    0.037(x1.e26 dyncm)  Mw=5.6  tau=  1.9     
nodal planes (strike/dip/slip):   16.09/ 45.43/ 57.75     238.04/ 52.95/118.44  
Centroid location :  -19.816  -174.885    33.408
Centroid time :     32.598
Variance reduction (%) :  14.1

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        *             ooooo--     o    o*   
       *           oooo---------- o      *  
      **        oooo--------------oo     ** 
      *       ooo-----------------oo      * 
     **     -oo-------------------o       **
     **   -ooo----------+---------o       **
     **  -oo----------------------o       **
      * -oo-----------T----------oo       * 
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                   ***********              

          0-   30-  60-  90-  120- 150- 180- 210- 240- 270- 300- 330-           
z-comp:     0    0    0    0    0    1    2    1    1    1    1    1            
r-comp:     0    0    0    0    0    1    0    0    0    1    0    1            
t-comp:     0    0    0    0    0    0    0    1    0    1    0    0            
Total number of traces used =  13  
number of runs = 14
starttime = Sat Sep 22 01:15:58 MDT 2012
Solution produced by inversion of channels with var red > 2%
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To: cmtcustomers@ldeo.columbia.edu
Subject: quick CMT: 2012/09/22, 06:58:25.6, TONGA ISLANDS, MW=5.5
X-Scanned-By: MIMEDefang 2.49 on 129.236.10.30


Here is the solution for the recent event.

September 22, 2012, TONGA ISLANDS, MW=5.5

Goran Ekstrom

CENTROID-MOMENT-TENSOR  SOLUTION
GCMT EVENT:     C201209220658A  
DATA: IU MN II G  CU IC GE LD DK
L.P.BODY WAVES:100S, 181C, T= 40
SURFACE WAVES: 125S, 223C, T= 50
TIMESTAMP:      Q-20120922224224
CENTROID LOCATION:
ORIGIN TIME:      06:58:30.7 0.1
LAT:21.03S 0.01;LON:173.65W 0.01
DEP: 15.3  0.4;TRIANG HDUR:  1.4
MOMENT TENSOR: SCALE 10**24 D-CM
RR= 1.360 0.023; TT=-0.084 0.017
PP=-1.270 0.019; RT= 0.675 0.054
RP= 1.440 0.064; TP=-0.568 0.014
PRINCIPAL AXES:
1.(T) VAL=  2.071;PLG=66;AZM=298
2.(N)       0.141;     2;    204
3.(P)      -2.206;    24;    113
BEST DBLE.COUPLE:M0= 2.14*10**24
NP1: STRIKE=199;DIP=21;SLIP=  85
NP2: STRIKE= 24;DIP=69;SLIP=  92

            ------#####           
        -----############--       
      ----###############----     
    ----#################------   
   ----#################--------  
  ----##################--------- 
  ---#######   #########--------- 
 ----####### T ########-----------
 ---########   #######------------
 ---##################------------
 ---#################-------   ---
  --################-------- P -- 
  ---##############---------   -- 
   ---############--------------  
    --##########---------------   
      --#######--------------     
        --###--------------       
            -----------           


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To: alert@emsc-csem.org, zirbes@usgs.gov
Subject: USGS WPhase Moment Tensor Solution

12/ 9/22  6:58:26.00

Epicenter: -20.820 -174.184
MW 5.6

USGS/WPHASE CENTROID MOMENT TENSOR
12/ 9/22  6:58:26.00
Centroid:  -20.720 -173.970
Depth  15         No. of sta: 22
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.59       Mtt=-0.32
  Mpp=-1.27       Mrt= 0.93
  Mrp= 1.88       Mtp=-0.60
 Principal axes:
  T  Val=  2.64  Plg=63  Azm=296
  N     = -0.03       0      206
  P     = -2.61      26      116

Best Double Couple:Mo=2.6*10**17
 NP1:Strike=206 Dip=18 Slip=  89
 NP2:        26     72        90

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