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Earthquake Hazards Program

Magnitude 4.9 TONGA REGION

Thursday, May 08, 2008 at 01:23:46 UTC

Historic USGS Moment Tensor Solutions

Historic Moment Tensor Solutions World Location
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

The most recent (20 or less) USGS Moment Tensor Solutions are shown.
Data from the Source Parameter Database.

                        E P I C E N T E R   |          MOMENT  |    P R I N C I P A L  A X E S       |N O D A L  P L A N E S | 
     DATE    TIME (UTC)   LAT      LONG  SRC|DEPTH     VAL  EX |     T            N            P     |     1           2     | %  SRC
  YR  MO DA HR MN SEC     deg      deg      |  km  Mw     Nm   |VAL  PL AZM  VAL  PL AZM  VAL  PL AZM|STK DP SLIP STK DP SLIP| DC
---------------------------------------------------------------------------------------------------------------------------------------
 2006 05 04 11:25:26.05 -20.579 -174.036 PDE|  7.0 6.0 1.3  18 |1.31 41 273 -0.02 15  16 -1.29 45 122|294 15 -172 197 88  -75| 97 GS              
 2006 05 05 04:19:40.92 -20.261 -173.866 PDE|  5.0 5.5 2.1  17 |2.19 13  91 -0.19  7 182 -2.00 75 302|171 33 -104   7 58  -81| 83 GS              
 2006 05 05 06:16:20.29 -19.833 -174.652 PDE| 26.0 5.9 8.1  17 |8.10 15 311 -0.06 66 184 -8.04 18  46| 88 67   -2 179 88 -157| 99 GS              
 2006 05 17 03:06:16.36 -20.634 -173.952 PDE|  6.0 6.0 1.1  18 |1.12 41 267 -0.06 17  13 -1.06 44 120|289 17 -174 193 88  -73| 89 GS              
 2006 05 17 21:57:49.07 -20.617 -173.972 PDE|  4.0 5.8 7.3  17 |7.31 39 286 -0.02  6 192 -7.29 51  95| 55  8  -46 191 84  -96| 99 GS              
 2006 07 03 13:40: 0.96 -20.485 -176.109 PDE|205.0 5.4 1.8  17 |1.80 25 115  0.01  4  23 -1.80 65 284|214 21  -78  21 70  -94| 99 GS              
 2006 07 07 07:26:12.53 -15.244 -173.610 PDE| 34.0 6.0 1.1  18 |1.07 47 195  0.04  0 104 -1.11 43  14| 96  2   81 284 88   90| 93 GS              
 2006 08 15 23:53:46.77 -21.189 -176.250 PDE|156.0 6.1 2.1  18 |2.05 34 127  0.04 35   9 -2.09 37 248|275 35   -3   8 88 -125| 96 GS              
 2006 09 03 04:26:29.41 -21.801 -175.146 PDE| 34.0 5.6 3.2  17 |3.17 61 197  0.13 28  32 -3.30  6 298|  1 46   49 232 57  124| 92 GS              
 2006 09 28 06:22: 9.73 -16.592 -172.033 PDE| 36.0 6.7 1.3  19 |1.47  2 294 -0.30  6  25 -1.17 84 186| 19 43  -98 210 47  -82| 59 GS              
 2006 11 30 11:33:17.02 -21.297 -174.677 PDE|  7.0 6.0 1.3  18 |1.34 55 301 -0.03  2  33 -1.31 35 124|223 10  100  33 80   88| 96 GS              
 2006 12 02 09:52:13.21 -17.774 -174.314 PDE|133.0 5.8 5.8  17 |4.86 21 360  1.78 55 236 -6.64 27 101|139 55   -4 231 87 -145| 46 GS              
 2006 12 17 12:51: 8.66 -21.258 -174.472 PDE| 10.0 5.7 4.2  17 |4.40 77 298 -0.40  0 207 -4.00 13 117|207 32   89  27 58   90| 82 GS              
 2007 02 05 09:55:51.10 -20.609 -175.650 PDE| 22.0 5.7 5.3  17 |5.34 10 264 -0.15 78 109 -5.18  5 354| 39 79    4 309 86  169| 94 GS              
 2007 04 05 03:25: 7.54 -16.999 -176.941 PDE| 18.0 5.7 4.2  17 |4.18  7 274  0.00 82 116 -4.18  3   5| 50 83    3 319 87  173|100 GS              
 2007 05 27 18:12:34.77 -20.069 -174.519 PDE| 36.0 5.6 3.1  17 |3.19 65 116 -0.17 25 304 -3.02  3 212|279 47   56 144 53  122| 89 GS              
 2007 07 06 17:40:49.64 -16.418 -172.644 PDE|  4.0 5.7 4.6  17 |4.91 34 202 -0.68 23 308 -4.23 47  65|238 24 -162 131 83  -67| 72 GS              
 2007 07 28 08:53:13.50 -15.898 -175.288 PDE|325.0 5.3 1.3  17 |1.15  4 157  0.21 14  66 -1.36 75 262|261 43  -69  54 50 -108| 69 GS              
 2007 08 26 12:37:31.19 -17.457 -174.335 PDE|                  |     40 105                    50 285| 15 85  -90 195  5  -90|    GS              
 2007 08 27 17:11:59.63 -17.311 -172.249 PDE|                  |     25 300                    65 120|210 70  -90  30 20  -90|    GS              

Latest USGS Fast Moment Tensor Solutions

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


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