Errors from USGS Location and Magnitude:
EQPROC = 4.5km (2.8 mi)
HYPO2K = 11.1km (6.9 mi)
Magnitude = 0.4
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2025/12/19 11:37:39 37.750 -121.939 M2.4 9.0 5 km SE of San Ramon, CA
EQPROC Summary:
2862 2025Dec19 1137 40.59 37.7383 -121.9875 2.50 0.15 23.1 62.8 215 5
GLFBZ SHZ PN 01 2025Dec19 1137 47.46 P D1 35.7 -0.00
ATZ SHZ PN 01 2025Dec19 1137 55.79 P D1 84.8 -0.00
B054 EHZ PB -- 2025Dec19 1137 45.33 P U0 23.1 -0.00
B058 EHZ PB -- 2025Dec19 1138 0.06 P ?2 110.3 0.47
B057 EHZ PB -- 2025Dec19 1137 51.05 P U0 60.3 -0.58
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2025-12-19 1137 41.60 37 43.735 122W 3.186 2.49 0.09 2.02 10.35 1.98 1.98E 2.48
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 19.5 Emb 198 7 4 5 0 5 - 3 0.98 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 3 0.98 E 11 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 19.5 319 91 PU 45.33 3.73 3.64 0.00 0.09 1.25 W 0.991 0.00 27.0 2.29 E
GLFBZPN SHZ 01 A 32.7 196 90 PD 1 47.46 5.86 5.80 0.00 0.06 0.94 W 0.955 0.00 13.0 1.66 E
B057 PB EHZ -- A 55.9 307 90 PU 51.05 9.45 9.56 0.00 -0.11 1.25 W 0.993 0.00 21.0 2.19 E
ATZ PN SHZ 01 A 84.4 170 90 PD 1 55.79 14.19 14.20 0.00 -0.01 0.94 W 0.552 0.00 7.00 4 1.16XE
B058 PB EHZ -- A111.3 157 90 P 2 60.06 18.46 18.57 0.00 -0.11 0.62 W 0.506 0.00 1.00 4