Errors from USGS Location and Magnitude:
EQPROC = 7.7km (4.8 mi)
HYPO2K = 8.9km (5.5 mi)
Magnitude = 0.0
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2026/09/21 05:18:00 37.640 -121.681 M2.0 10.2 9 km ESE of Livermore, CA
EQPROC Summary:
3021 2026Sep21 518 1.63 37.6844 -121.7474 8.00 0.04 44.4 67.7 234 5
B054 EHZ PB -- 2026Sep21 518 9.85 P U1 44.4 0.00
MTUMZ SHZ PN 01 2026Sep21 518 12.56 P ?0 60.5 0.00
ADUB1 SHZ PN 01 2026Sep21 518 11.25 P D1 52.7 0.00
B057 EHZ PB -- 2026Sep21 518 15.16 P U2 81.6 -0.69
B058 EHZ PB -- 2026Sep21 518 18.26 P ?2 99.4 -0.19
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2026-09-21 0518 1.25 37 43.014 121W39.987 8.21 0.09 3.12 11.05 1.98 1.98E 8.17
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 49.6 Emb 246 7 3 4 0 5 - 1 0.00 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
1.98 1 0.00 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 49.6 289 97 PU 1 9.85 8.60 8.59 0.00 0.01 1.00 W 1.000 0.00 17.0 1.98 E
ADUB1PN SHZ 01 A 59.0 209 96 PD 1 11.25 10.00 10.12 0.00 -0.12 1.00 W 1.000 0.00 5.00 4 0.81XE
MTUMZPN SHZ 01 A 65.8 199 95 P 12.56 11.31 11.22 0.00 0.09 1.33 W 1.000 0.00 3.00 4 0.32XE
B057 PB EHZ -- A 86.3 294 94 PU 2 15.16 13.91 14.54 0.00 -0.63* 0.00 W 0.000 0.00 3.00 4 0.34XE
B058 PB EHZ -- A102.1 175 93 P 2 18.26 17.01 17.10 0.00 -0.09 0.67 W 1.000 0.00 1.00 4