Errors from USGS Location and Magnitude:
EQPROC = 6.7km (4.2 mi)
HYPO2K = 5.1km (3.2 mi)
Magnitude = -0.2
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2026/09/28 04:49:04 37.462 -121.775 M2.1 5.6 12 km NNE of Alum Rock, CA
EQPROC Summary:
3027 2026Sep28 449 5.22 37.4440 -121.8474 12.84 0.00 24.8 61.6 110 5
ADUB1 SHZ PN 01 2026Sep28 449 10.39 P D0 24.8 -0.00
B054 EHZ PB -- 2026Sep28 449 15.24 P U1 55.7 -0.00
B057 EHZ PB -- 2026Sep28 449 20.34 P ?3 90.7 -0.00
B058 EHZ PB -- 2026Sep28 449 18.11 P U3 75.4 -0.00
RE9A7 EHZ AM 00 2026Sep28 449 24.52 S ?1 48.5 3.87
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2026-09-28 0449 5.38 37 26.656 121W49.964 13.00 0.10 3.38 8.62 2.33 2.33E 12.98
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 25.5 Emb 196 8 3 4 0 4 - 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
2.33 1 0.00 E 15 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
ADUB1PN SHZ 01 A 25.5 211 114 PD 10.39 5.01 5.00 0.00 0.01 1.78 W 1.000 0.00 26.0 2.33 E
B054 PB EHZ -- A 56.4 326 101 PU 1 15.24 9.86 9.81 0.00 0.05 1.33 W 1.000 0.00 1.00 4
B058 PB EHZ -- A 75.0 162 98 PU 3 18.11 12.73 12.79 0.00 -0.06 0.44 W 1.000 0.00 1.00 4
B057 PB EHZ -- A 91.4 316 97 P 3 20.34 14.96 15.44 0.00 -0.48 0.44 W 1.000 0.00 3.00 4 0.39XE