Errors from USGS Location and Magnitude:
EQPROC = 3.4km (2.1 mi)
HYPO2K = 5.1km (3.2 mi)
Magnitude = -0.5
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2013/04/20 01:34:01 37.452 -121.775 M2.1 5.6 10 km ( 6 mi) NNE of Alum Rock, CA
EQPROC Summary:
288 2013Apr20 134 2.17 37.4275 -121.7517 7.23 0.30 28.4 58.9 114 5
ADUB1 SHZ PN 01 2013Apr20 134 7.66 P U0 28.4 -0.02
COS SHZ PN 07 2013Apr20 134 8.70 P D0 34.5 -0.00
B058 EHZ PB -- 2013Apr20 134 15.30 P D1 71.4 0.37
B057 EHZ PB -- 2013Apr20 134 18.05 P ?2 98.0 -0.79
B054 EHZ PB -- 2013Apr20 134 14.25 P D1 62.2 0.87
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH RMS ERH ERZ XMAG1 FMAG1 PMAG
2013-04-20 0134 2.94 37 24.77 121 44.24 3.61 0.38 2.02 30.13 2.65 2.65E
SOURCE
NSTA NPHS DMIN MODEL GAP ITR NFM NWR NWS NVR REMRKS-AVH N.XMG-XMMAD-T N.FMG-FMMAD-T L F X
5 5 28.3 Emb 110 7 4 4 0 5 - 2 0.18 E W W
XMAG2-N.XMG2-XMMAD-T-S FMAG2-N.FMG2-FMMAD-T-S PREF.MAG-N.PMAG-PRMAD-T
2.65 2 0.18 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
ADUB1PN SHZ 01 A 28.3 230 93 PU 7.66 4.72 5.07 0.00 -0.35 1.14 W 1.000 0.00 31.0 2.47 E
COS PN SHZ 07 A 33.8 71 92 PD 8.70 5.76 5.97 0.00 -0.21 1.14 W 0.999 0.00 43.0 2.82 E
B054 PB EHZ -- A 64.3 321 91 PD 1 14.25 11.31 10.92 0.00 0.39 0.86 W 1.000 0.00 3.00 4 0.32XE
B058 PB EHZ -- A 69.5 168 91 PD 1 15.30 12.36 11.77 0.00 0.59* 0.86 W 1.000 0.00 1.00 4
B057 PB EHZ -- A 99.9 314 90 P 2 18.05 15.11 16.74 0.00 -1.63* 0.00 W 0.000 0.00 1.00 4