Event Number 31

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 16.0km (9.9 mi)
HYPO2K = 28.9km (17.9mi) Magnitude = 0.2

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2012/05/12 04:23:19  38.127 -121.893  M2.3   19.5  12 km (  8 mi) N   of Pittsburg, CA

EQPROC Summary:

31 2012May12  423 17.50  38.2673 -121.8512  8.00 0.12 54.7 79.1 258  4
TASRZ SHZ PN 01 2012May12  423 31.44 P ?2  79.4   0.04
ADUB1 SHZ PN 01 2012May12  423 36.68 P ?3 113.9   0.42
B054  EHZ PB -- 2012May12  423 27.45 P U1  54.7   0.00
B057  EHZ PB -- 2012May12  423 30.50 P U2  68.4   0.73

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH   RMS   ERH   ERZ  XMAG1 FMAG1 PMAG
 2012-05-12  0423 15.76  38 18.92  121 39.30   8.17  0.21  6.62 18.83        2.07  2.07E
                                                                                          SOURCE
 NSTA NPHS  DMIN MODEL GAP ITR NFM NWR NWS NVR REMRKS-AVH  N.XMG-XMMAD-T   N.FMG-FMMAD-T  L F X
    4    4  69.5  Emb  271  13   2   4   0   4      -                          2  0.05 E  W W  

 XMAG2-N.XMG2-XMMAD-T-S  FMAG2-N.FMG2-FMMAD-T-S  PREF.MAG-N.PMAG-PRMAD-T
                                                     2.07      2  0.05 E
 REGION=                          

 STA NET COM L CR DIST AZM  AN P/S WT   SEC (TOBS -TCAL -DLY  =RES)  WT   SR  INFO  CAL  DUR-W-FMAG-T -AMP-U-PER-W-XMAG-T DE
 B054 PB EHZ -- A 69.5 224  95  PU 1  27.45 11.69 11.81 0.00 -0.12  1.50  W  1.000 0.00 19.0   2.11 E                        
 B057 PB EHZ -- A 86.0 249  94  PU 2  30.50 14.74 14.48 0.00  0.26  1.00  W  0.999 0.00 17.0   2.02 E                        
 TASRZPN SHZ 01 A 93.9 283  93  P  2  31.44 15.68 15.77 0.00 -0.09  1.00  W  1.000 0.00 1.00 4                               
 ADUB1PN SHZ 01 A121.9 194  92  P  3  36.68 20.92 20.32 0.00  0.60* 0.50  W  1.000 0.00 1.00 4