Errors from USGS Location and Magnitude:
EQPROC = 5.5km (3.4 mi)
HYPO2K = 2.7km (1.7 mi)
Magnitude = -0.3
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2021/12/18 19:21:33 37.360 -121.715 M1.9 8.5 10km E of Alum Rock, CA
EQPROC Summary:
2207 2021Dec18 1921 32.81 37.3785 -121.6571 8.50 0.07 32.0 59.3 222 4
MTUMZ SHZ PN 01 2021Dec18 1921 39.04 P ?0 32.8 -0.05
ADUB1 SHZ PN 01 2021Dec18 1921 38.96 P D0 32.0 0.00
B057 EHZ PB -- 2021Dec18 1921 51.09 P ?2 107.8 0.35
B058 EHZ PB -- 2021Dec18 1921 44.84 P D2 64.7 0.39
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2021-12-18 1921 33.59 37 22.752 121W41.991 8.39 0.10 2.58 11.54 2.23 2.23E 8.35
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 28.8 Emb 216 5 2 4 0 4 - 2 2.22 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
2.23 2 2.22 E 42 3 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
ADUB1PN SHZ 01 A 28.8 240 103 PD 38.96 5.37 5.28 0.00 0.09 1.33 W 1.000 0.00 24.0 2.23 E
MTUMZPN SHZ 01 A 30.6 216 102 P 39.04 5.45 5.56 0.00 -0.11 1.33 W 1.000 0.00 9.00 1.30 E
B058 PB EHZ -- A 65.2 170 95 PD 2 44.84 11.25 11.12 0.00 0.13 0.67 W 1.000 0.00 1.00 4
B057 PB EHZ -- A104.9 314 93 P 2 51.09 17.50 17.56 0.00 -0.06 0.67 W 1.000 0.00 1.00 4