Errors from USGS Location and Magnitude:
EQPROC = 39.2km (24.3mi)
HYPO2K = 38.5km (23.9mi)
Magnitude = 0.2
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2025/12/28 13:18:58 37.768 -121.933 M2.6 7.3 4 km ESE of San Ramon, CA
EQPROC Summary:
2874 2025Dec28 1319 1.76 37.6343 -122.3441 20.46 0.05 27.1 68.1 184 6
GLFBZ SHZ PN 01 2025Dec28 1319 8.16 P ?2 27.1 0.52
ADUB1 SHZ PN 01 2025Dec28 1319 11.37 P ?1 53.7 0.00
RE9A7 EHZ AM 00 2025Dec28 1319 15.33 P U0 82.3 0.00
ATZ SHZ PN 01 2025Dec28 1319 15.39 P ?0 82.8 0.00
B057 EHZ PB -- 2025Dec28 1319 10.53 P ?3 47.8 0.00
B058 EHZ PB -- 2025Dec28 1319 19.14 Pn?3 114.6 -0.30
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2025-12-28 1319 1.02 37 38.124 122W20.840 34.15 0.01 1.15 2.10 2.40 2.40E 34.15
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 27.4 Emb 186 7 1 5 0 6 4 2.40 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
2.40 4 2.40 E 3 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
GLFBZPN SHZ 01 A 27.4 140 138 P 2 8.16 7.14 7.16 0.00 -0.02 0.71 W 0.759 0.00 15.0 2.11 E
B057 PB EHZ -- A 47.6 337 121 P 3 10.53 9.51 9.50 0.00 0.01 0.36 W 0.980 0.00 25.0 2.68 E
ADUB1PN SHZ 01 A 54.0 142 117 P 1 11.37 10.35 10.33 0.00 0.02 1.07 W 0.368 0.00 53.0 3.42 E
RE9A7AM EHZ 00 A 82.6 83 106 PU 15.33 14.31 14.31 0.00 0.00 1.43 W 0.996 0.00 3.00 4 0.68XE
ATZ PN SHZ 01 A 83.1 151 106 P 15.39 14.37 14.38 0.00 -0.01 1.43 W 0.895 0.00 83.0 1 3.88 E
B058 PB EHZ -- A115.0 143 54 P 3 19.14 18.12 18.73 0.00 -0.61* 0.00 W 0.000 0.00 1.00 4