Errors from USGS Location and Magnitude:
EQPROC = 15.2km (9.4 mi)
HYPO2K = 11.1km (6.9 mi)
Magnitude = 0.2
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2020/12/18 18:52:43 37.629 -122.035 M2.2 6.4 4km NNW of Union City, CA
EQPROC Summary:
2002 2020Dec18 1852 43.29 37.6788 -121.8748 8.00 0.03 35.0 53.6 237 4
MTUMZ SHZ PN 01 2020Dec18 1852 53.90 P U1 58.4 0.03
ADUB1 SHZ PN 01 2020Dec18 1852 52.25 P ?0 48.8 0.00
B057 EHZ PB -- 2020Dec18 1852 55.90 P ?3 72.2 -0.24
B054 EHZ PB -- 2020Dec18 1852 49.89 P ?0 35.0 -0.04
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2020-12-18 1852 44.04 37 40.226 121W55.072 7.89 0.01 4.47 7.53 2.03 2.03E 7.85
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 32.5 Emb 227 7 1 4 0 4 - 2 2.02 E W W
XMAG2-N.XMG2-XMMAD-T-S FMAG2-N.FMG2-FMMAD-T-S PREF.MAG-N.PMAG-PRMAD-T DEPDAT NS ZT TYP
2.03 2 2.02 E 39 4 M CRH
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 32.5 311 100 P 49.89 5.85 5.85 0.00 -0.00 1.33 W 0.999 0.00 19.0 2.03 E
ADUB1PN SHZ 01 A 47.3 187 97 P 52.25 8.21 8.22 0.00 -0.01 1.33 W 1.000 0.00 22.0 2.22 E
MTUMZPN SHZ 01 A 57.4 178 96 PU 1 53.90 9.86 9.86 0.00 -0.00 1.00 W 0.999 0.00 5.00 4 0.80XE
B057 PB EHZ -- A 69.4 305 94 P 3 55.90 11.86 11.80 0.00 0.06 0.33 W 0.999 0.00 5.00 4 0.82XE