USGS Energy and Broadband Solution

TONGA REGION
12/11/17 05:12:56 UTC
Epicenter: 18.31S 172.37W

 Energy Magnitude         Me 6.0                                       
Broadband Source Parameters:
 BROADBAND DEPTH:        10.0 km
 BROADBAND FAULT PLANE SOLUTION: 
 NP1:Strike=175 Dip=75 Slip=-150
 NP2:        77     61       -17
 Principal Axes:
  T              Plg= 9  Azm=303
  P                  32       39
 RADIATED ENERGY:                                                     
  No. of sta:  8  Focal mech.  F                                      
  Energy       2.5+0.8*10**13 Nm                                      
 COMMENT:  Depth from synthetics
  of broadband displacement     
  seismograms.                  
  Apparent Stress       0.91 MPa

Explanation of Parameters
Latest USGS Energy Solutions
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For more information, contact George Choy, choy@usgs.gov