USGS Energy and Broadband Solution

TONGA
13/02/15 03:02:23 UTC
Epicenter: 19.72S 174.48W

 Energy Magnitude         Me 5.4                                       
Broadband Source Parameters:
 BROADBAND DEPTH:        74.0 km
 BROADBAND FAULT PLANE SOLUTION: 
 NP1:Strike=200 Dip=75 Slip= -90
 NP2:        20     15       -90
 Principal Axes:
  T              Plg=30  Azm=290
  P                  60      110
 RADIATED ENERGY:                                                     
  No. of sta: 22  Focal mech.  F                                      
  Energy       2.4+0.5*10**12 Nm                                      
 COMMENT:  Depth from synthetics
  of broadband displacement     
  seismograms.                  
  Apparent Stress       0.33 MPa

Explanation of Parameters
Latest USGS Energy Solutions
Source Parameter Search

For more information, contact George Choy, choy@usgs.gov