Earthquake Southern East Pacific Rise 12-May-14 (E141321838)

See source attribution and disclaimer notice

Preliminary Details – subject to review.

Derived from Event Data Source: USGS See details below
Magnitude 5.8 mb [subject to review and confirmation]
On both EMSC (Reviewed) and GFZ Potsdam (Automatic) as Magnitude 6.4 Mw
This link shows the event and any aftershocks during the following month using the IRIS Earthquake Browser [→]

  • Date-Time: 2014-05-12T18:38:37.540Z UTC
  • Earthquake location: 49.967°S, 114.670°W
  • Seismic Region: 43 – Southeastern & Antarctic Pacific Ocean
  • Seismic Geo Area: 6840 – Southern East Pacific Rise
  • Earthquake depth: 8.2 km
  • Distances:
    1. 2572km (1598mi) S of Hanga Roa, Chile
    2. 2935km (1823mi) WSW of Puerto Natales, Chile
    3. 3006km (1867mi) W of Punta Arenas, Chile
    4. 3142km (1952mi) W of Ushuaia, Argentina
    5. 3068km (1906mi) SSE of Adamstown, Pitcairn
  • Event ID: usb000qjhh

Mag 6+ events in region in the last 20 years ~500 miles radius of the event (Max 1000) from IRIS [→]
(The current event may not appear for an hour or so after the time.)
The above events in the IRIS Earthquake Browser 3D viewer [→]

Seismogram at IU.CASY (IRIS Time Series plot band pass filtered 0.004-0.05)

IU.CASY.10.BHZ_20140512184000-20140512203000_dm_autosc_bpf0.004-0.05_w2000_h700(Click the Image for a larger/clearer version) [→]

GFZ Potsdam Moment Tensor [→]

GFZ Event gfz2014jgtu
14/05/12 18:38:37.54
Southern East Pacific Rise
Epicenter: -49.92 -114.75
MW 6.4

GFZ MOMENT TENSOR SOLUTION
Depth  13        No. of sta: 112
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.05       Mtt= 2.63
  Mpp=-2.68       Mrt= 0.38
  Mrp= 1.20       Mtp= 4.45
Principal axes:
  T  Val=  5.32  Plg=10  Azm=330
  N        0.02      76      193
  P       -5.34       9       61

Best Double Couple:Mo=5.3*10**18
 NP1:Strike=105 Dip=76 Slip=   1
 NP2:        15     89       166

           ##########-           
        ############-----        
     ###############--------     
    ###############----------    
  #################------------  
  #################------------  
 #################-------------- 
--################---------------
-----############----------------
--------#########----------------
-------------###-----------------
----------------###--------------
 --------------################# 
  -------------################  
  ------------#################  
    ----------###############    
     --------###############     
        -----############        
           -##########           

One has to wonder why it is that USGS continue to do this so often. Posted as Magnitude 5.8 mb yet the same as other providers in the moment tensors.

Screen shot of the page linked above

USGS-Moment-Tensors(Click the Image for a larger/clearer version)

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