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Thursday, September 22, 2011

Mag 6.8 Earthquake TONGA




       EMSC HAS RECORDED THE FOLLOWING SEISMIC EVENT
_____________________________________________________________________



EARTHQUAKE on 22/09/2011 at 23:07 (UTC)
TONGA                                  154 km W  Hihifo

MAGNITUDE: Mw 6.8

Data provided by: BGSG GFZ  MAD  PTWC SC3                          

Latitude    =  15.73 S
Longitude   = 175.18 W
Origin Time =  23:07:12.2 (UTC)
Depth       =  60 Km
RMS         =   1.65 sec
Gap         =  71 degrees
95% confidence ellipse: - Semi major = 21.3 Km
                        - Semi minor = 14.6 Km
                        - Azimuth of major axis = 141 degrees

Number of data used = 36

Preliminary location computed on Thu Sep 22 23:27:19 2011 (UTC)
Done by Bruno Hernandez

Comments :

Message number: 1530

All magnitudes estimations :
Mw6.5 (BGSG)  M 6.0 (GFZ)   mb6.1 (MAD)   Mw6.8 (PTWC) 
Mw6.6 (SC3)                                            

P.S.: For additional information, please contact EMSC at:
             - Email: mazet@emsc-csem.org
             - Web  : http://www.emsc-csem.org (maps available)
             - Fax  : 33 1 69 26 70 00


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