Phase Data

Explanation of Parameters


     26 MAR 2013  ( 85)

     ot  = 13:37:49.65   +/-   0.38              CENTRAL MID-ATLANTIC RIDGE      
     lat =       8.721   +/-    6.6
     lon =     -40.425   +/-    8.6              MAGNITUDE 4.7 (GS)       
     dep =        10.0  (assigned)    

     1288 km (800 miles) NNE of Braganca, Para, Brazil
     1293 km (803 miles) N of Parnaiba, Piaui, Brazil
     1312 km (815 miles) NNE of Sao Luis, Maranhao, Brazil
     2830 km (1757 miles) NNE of BRASILIA, Distrito Federal, Brazil

     nph =   23 of  23    se = 0.72    FE=406                            A   

     error ellipse = ( 78.3,  0.0, 11.4;168.3,  0.0,  8.6;  0.0,  0.0,  0.0)

 mb = 4.7 ( 22)  ML = 0.0 (  0)  mblg = 0.0 (  0)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 RCBR ePn     13:41:23.99   0.2   15.1 163 b:1.7+1 .95 4.4                   RCBR
 PTGA eP      13:42:40.08  -0.1   21.6 245 b:6.2+1 1.0 5.0                   PTGA
 BDFB eP      13:43:17.08  -0.1   25.3 197 b:5.5+1 1.9 4.9                   BDFB
 LPAZ eP      13:44:59.97  -0.5   37.0 228 b:5.8+0 .80 4.4                   LPAZ
 TOA0 eP      13:45:37.19  -0.7   41.6  80 b:5.7+0 .95 4.3                   TOA0
 ULM  eP      13:48:06.09  -1.4   61.6 323 b:5.8+0 .85 4.8                   ULM 
 SUMG eP      13:48:21.94  -0.3   63.8   1 b:5.0+1 2.0 5.4                   SUMG
 MNTX eP      13:48:23.79  -1.2   64.2 301 b:3.6+0 .95 4.5                   MNTX
 SDCO eP      13:48:31.46   0.7   65.0 308 b:5.2+0 1.0 4.7                   SDCO
 S22A eP      13:48:38.07   0.5   66.1 307 b:5.8+0 1.1 4.7                   S22A
 FFC  eP      13:48:40.00  -0.7   66.7 326 b:1.3+1 1.4 4.9                   FFC 
 TUC  eP      13:48:54.76   0.1   68.8 301 b:1.4+1 1.7 4.9                   TUC 
 WUAZ eP      13:48:59.84   0.9   69.5 305 b:8.1+0 .80 4.9                   WUAZ
 U15A eP      13:49:04.91   0.9   70.3 305 b:5.7+0 1.0 4.6                   U15A
 BGU  eP      13:49:09.60   0.3   71.2 310 b:2.5+1 1.5 5.1                   BGU 
 HLID eP      13:49:16.91   0.2   72.4 313 b:5.2+0 1.2 4.5                   HLID
 RES  eP      13:49:17.58   0.4   72.7 347 b:6.0+0 1.2 4.5                   RES 
 ELK  eP      13:49:19.77   0.4   72.9 310 b:5.5+0 1.4 4.5                   ELK 
 YKB5 eP      13:49:30.11  -1.1   75.0 332                                   YKB5
 KVN  eP      13:49:32.10   0.2   75.0 308 b:1.8+1 1.8 4.8                   KVN 
 MOD  eP      13:49:41.23  -0.3   76.7 311 b:5.3+0 .85 4.7                   MOD 
 INK  eP      13:50:15.52   0.1   83.1 338 b:1.9+1 1.5 5.1                   INK 
 ABKAReP      13:50:51.56   1.2   90.2  40 b:3.5+0 .95 4.6                   ABKA



 Generated 2013 MAR 26 at 17:01 UTC

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