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Earthquake Hazards Program

Magnitude 8.1 SAMOA ISLANDS REGION

Tuesday, September 29, 2009 at 17:48:10 UTC

Global CMT Project Moment Tensor Solution


September 29, 2009, SAMOA ISLANDS REGION, MW=8.1

Goran Ekstrom

CENTROID-MOMENT-TENSOR  SOLUTION
GCMT EVENT:     M200909291748A  
DATA: II IU CU IC G  GE 
MANTLE WAVES:   96S, 270C, T=200
TIMESTAMP:      Q-20090929212034
CENTROID LOCATION:
ORIGIN TIME:      17:48:27.7 0.2
LAT:15.19S 0.02;LON:171.91W 0.01
DEP: 12.0  FIX;TRIANG HDUR: 27.5
MOMENT TENSOR: SCALE 10**28 D-CM
RR=-1.140 0.007; TT= 0.425 0.006
PP= 0.719 0.006; RT=-0.877 0.079
RP=-1.300 0.082; TP=-0.604 0.005
PRINCIPAL AXES:
1.(T) VAL=  1.416;PLG=23;AZM= 77
2.(N)       0.817;    25;    178
3.(P)      -2.230;    55;    310
BEST DBLE.COUPLE:M0= 1.82*10**28
NP1: STRIKE=129;DIP=31;SLIP=-144
NP2: STRIKE=  7;DIP=72;SLIP= -64

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

Global CMT Project Catalog Search

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver


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