Errors from USGS Location and Magnitude:
EQPROC = 3.6km (2.2 mi)
HYPO2K = 2.3km (1.5 mi)
Magnitude = -0.6
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2026/01/15 14:54:41 37.470 -121.593 M3.1 8.8 24 km ENE of Alum Rock, CA
EQPROC Summary:
2887 2026Jan15 1454 42.10 37.4669 -121.6337 13.00 0.10 33.6 57.8 169 6
RE9A7 EHZ AM 00 2026Jan15 1454 48.68 P D0 33.6 -0.01
ADUB1 SHZ PN 01 2026Jan15 1454 49.58 P D0 39.1 -0.00
GLFBZ SHZ PN 01 2026Jan15 1454 52.16 P ?3 45.7 1.51
ATZ SHZ PN 01 2026Jan15 1454 52.85 P ?3 59.1 0.25
B054 EHZ PB -- 2026Jan15 1454 53.73 P U0 66.4 0.07
B057 EHZ PB -- 2026Jan15 1454 58.73 P U0 103.2 -0.20
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2026-01-15 1454 41.89 37 28.141 121W37.748 22.72 0.17 3.51 9.95 3.68 3.68E 22.71
SOURCE
NSTA NPHS DMIN MODEL GAP ITR NFM NWR NWS NVR REMRKS-AVH N.XMG-XMMAD-T N.FMG-FMMAD-T L F X
6 6 33.2 Emb 170 7 4 5 0 6 5 0.40 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
3.68 5 0.40 E 11 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
RE9A7AM EHZ 00 A 33.2 34 115 PD 48.68 6.79 6.79 0.00 0.00 1.19 W 0.998 0.00 132 2 4.08 E
ADUB1PN SHZ 01 A 39.7 232 109 PD 49.58 7.69 7.69 0.00 -0.00 1.19 W 0.987 0.00 101 3.86 E
GLFBZPN SHZ 01 A 46.3 267 104 P 3 52.16 10.27 8.63 0.00 1.64* 0.00 W 0.000 0.00 47.0 3.13 E
ATZ PN SHZ 01 A 59.5 204 98 P 3 52.85 10.96 10.57 0.00 0.39 0.25 W 0.771 0.00 23.0 4 2.46XE
B054 PB EHZ -- A 66.5 311 96 PU 53.73 11.84 11.60 0.00 0.24 1.19 W 0.586 0.00 45.0 3.11 E
B057 PB EHZ -- A103.2 308 92 PU 58.73 16.84 17.07 0.00 -0.23 1.19 W 0.656 0.00 41.0 1 3.06 E