Testimonies, photostemp
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/120925030652.C000CVD1
usr/passwd : rcmt/rcmt
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General region : C000CVD1 TONGA
surface waves (3.0,3.5,7,7.5 mHz)
Stations used : CASY CTAO KIP MAJO PET SNZO TAU YSS
Origin time: 2012 269 3 6 52
Origin time reformatted: 2012-09-25 03:06:52
Original location (lat,lon,depth) : -15.5 -173.9 104
Moment tensor (x1.e26 dyncm) :
Mrr : 0.011478 Mtt : -0.071393
Mff : 0.059916 Mrt : 0.004677
Mrf : 0.019694 Mtf : 0.030619
T-axis: moment= 0.073 plunge= 18.120 azimuth= 282.539
N-axis: moment= 0.005 plunge= 71.878 azimuth= 101.862
P-axis: moment= -0.078 plunge= 0.200 azimuth= 192.473
best double couple: Mo= 0.076(x1.e26 dyncm) Mw=5.9 tau= 2.3
nodal planes (strike/dip/slip): 58.96/ 77.44/ 13.17 326.05/ 77.15/167.11
Centroid location : -15.097 -173.810 124.003
Centroid time : 6.218
Variance reduction (%) : 20.4
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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 0 1 1 2
r-comp: 0 0 0 0 0 1 0 0 0 1 0 1
t-comp: 0 0 0 0 0 1 1 1 0 1 0 1
Total number of traces used = 16
number of runs = 1
starttime = Mon Sep 24 22:04:07 MDT 2012
Solution produced by inversion of channels with var red > 2%
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To: eqinfo-mt@gfz-potsdam.de
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Message-ID:
Subject: MT solution GFZ event gfz2012svwz
GFZ Event gfz2012svwz
12/09/25 03:06:52.50
Tonga Islands
Epicenter: -15.49 -173.86
MW 5.6
GFZ CENTROID MOMENT TENSOR SOLUTION
12/09/25 03:06:55.62
Centroid: -15.5 -173.7
Depth 109 No. of sta: 49
Moment Tensor; Scale 10**17 Nm
Mrr= 1.71 Mtt=-2.43
Mpp= 0.73 Mrt= 0.80
Mrp= 1.67 Mtp=-2.43
Principal axes:
T Val= 3.03 Plg=54 Azm=281
N -0.42 33 75
P -2.62 13 173
Best Double Couple:Mo=2.8*10**17
NP1:Strike= 57 Dip=66 Slip= 53
NP2: 299 43 143
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To: cmtcustomers@ldeo.columbia.edu
Subject: quick CMT: 2012/09/25, 03:06:52.0, TONGA ISLANDS, MW=5.7
X-Scanned-By: MIMEDefang 2.49 on 129.236.10.30
Here is the solution for the recent event.
September 25, 2012, TONGA ISLANDS, MW=5.7
Howard Koss
CENTROID-MOMENT-TENSOR SOLUTION
GCMT EVENT: C201209250306A
DATA: II IU CU MN G IC LD GE DK
L.P.BODY WAVES:129S, 227C, T= 40
MANTLE WAVES: 46S, 49C, T=125
SURFACE WAVES: 138S, 284C, T= 50
TIMESTAMP: Q-20120925075009
CENTROID LOCATION:
ORIGIN TIME: 03:06:58.1 0.1
LAT:15.38S 0.01;LON:173.61W 0.01
DEP:120.7 0.7;TRIANG HDUR: 1.7
MOMENT TENSOR: SCALE 10**24 D-CM
RR= 1.650 0.035; TT=-3.840 0.042
PP= 2.190 0.043; RT= 0.953 0.031
RP= 2.390 0.027; TP=-0.417 0.041
PRINCIPAL AXES:
1.(T) VAL= 4.338;PLG=42;AZM=273
2.(N) -0.217; 45; 68
3.(P) -4.121; 13; 171
BEST DBLE.COUPLE:M0= 4.23*10**24
NP1: STRIKE=303;DIP=51;SLIP= 156
NP2: STRIKE= 49;DIP=71;SLIP= 42
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To: alert@emsc-csem.org, zirbes@usgs.gov
Subject: USGS WPhase Moment Tensor Solution
12/ 9/25 3: 6:52.00
Epicenter: -15.472 -173.922
MW 5.6
USGS/WPHASE CENTROID MOMENT TENSOR
12/ 9/25 3: 6:52.00
Centroid: -15.772 -173.715
Depth 110 No. of sta: 27
Moment Tensor; Scale 10**17 Nm
Mrr= 1.22 Mtt=-2.57
Mpp= 1.35 Mrt= 0.15
Mrp= 1.72 Mtp=-0.44
Principal axes:
T Val= 3.02 Plg=43 Azm=266
N = -0.36 45 74
P = -2.65 6 171
Best Double Couple:Mo=2.9*10**17
NP1:Strike=299 Dip=56 Slip= 150
NP2: 47 66 38
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