Errors from USGS Location and Magnitude:
EQPROC = 14.7km (9.1 mi)
HYPO2K = 12.6km (7.8 mi)
Magnitude = 0.5
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2023/04/20 03:35:47 37.948 -121.810 M3.8 16.4 6km S of Antioch, CA
EQPROC Summary:
2446 2023Apr20 335 45.48 38.0517 -121.7055 2.69 0.08 48.5114.3 247 9
LCGPZ SHZ PN 01 2023Apr20 335 59.36 P ?0 77.7 -0.08
ADUB1 SHZ PN 01 2023Apr20 336 1.86 P D0 92.6 0.01
MTUMZ SHZ PN 01 2023Apr20 336 3.05 P ?1 101.3 -0.07
ATZ SHZ PN 01 2023Apr20 336 6.31 P D0 120.5 0.56
B054 EHZ PB -- 2023Apr20 335 54.50 P U0 48.5 0.00
B057 EHZ PB -- 2023Apr20 335 59.15 P U0 76.0 0.00
B058 EHZ PB -- 2023Apr20 336 7.55 Pn?2 139.6 -0.63 WAIF
B058 EHZ PB -- 2023Apr20 336 7.55 Pg?2 139.6 -1.16 WAIF
B073 EHZ PB -- 2023Apr20 336 25.35 PgD2 258.0 -0.65
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2023-04-20 0335 46.58 38 2.146 121W43.353 6.35 0.08 3.03 3.47 3.30 3.30E 6.32
SOURCE
NSTA NPHS DMIN MODEL GAP ITR NFM NWR NWS NVR REMRKS-AVH N.XMG-XMMAD-T N.FMG-FMMAD-T L F X
7 7 46.2 Emb 243 5 5 7 0 7 6 3.18 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
3.30 6 3.18 E 31 5 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 46.2 246 95 PU 54.50 7.92 8.02 0.00 -0.10 1.12 W 0.442 0.00 77.0 3.43 E
B057 PB EHZ -- A 74.0 270 93 PU 59.15 12.57 12.53 0.00 0.04 1.12 W 0.884 0.00 65.0 3.30 E
LCGPZPN SHZ 01 A 75.2 218 93 P 59.36 12.78 12.72 0.00 0.06 1.12 W 0.642 0.00 58.0 3.19 E
ADUB1PN SHZ 01 A 90.4 195 92 PD 61.86 15.28 15.19 0.00 0.09 1.12 W 0.304 0.00 115 1 3.86 E
MTUMZPN SHZ 01 A 99.2 190 92 P 1 63.05 16.47 16.61 0.00 -0.14 0.84 W 0.240 0.00 63.0 1 3.29 E
ATZ PN SHZ 01 A118.4 188 92 PD 66.31 19.73 19.74 0.00 -0.01 1.12 W 0.490 0.00 194 2 4.40 E
B073 PB EHZ -- A257.2 153 48 PD 2 85.35 38.77 38.79 0.00 -0.02 0.56 W 0.994 0.00 1.00 4