Errors from USGS Location and Magnitude:
EQPROC = 10.7km (6.6 mi)
HYPO2K = 8.2km (5.1 mi)
Magnitude = 0.1
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2025/12/21 20:40:49 36.786 -121.410 M3.5 7.2 5 km SW of Ridgemark, CA
EQPROC Summary:
2870 2025Dec21 2040 49.71 36.7198 -121.4964 3.00 0.00 11.6 63.6 175 4
ATZ SHZ PN 01 2025Dec21 2040 58.19 P ?0 45.7 0.00
ADUB1 SHZ PN 01 2025Dec21 2041 2.83 P ?3 72.5 0.09
B058 EHZ PB -- 2025Dec21 2040 52.41 P U0 11.6 0.00
B073 EHZ PB -- 2025Dec21 2041 10.46 P ?2 124.7 0.00
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2025-12-21 2040 49.84 36 43.331 121W27.913 2.40 0.11 7.25 11.19 3.44 3.44E 2.39
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 13.4 Emb 174 5 1 4 0 4 - 3 1.71 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
3.44 3 1.71 E 8 3 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
B058 PB EHZ -- A 13.4 310 91 PU 52.41 2.57 2.66 0.00 -0.09 1.45 W 1.000 0.00 71.0 3.18 E
ATZ PN SHZ 01 A 48.0 307 90 P 58.19 8.35 8.27 0.00 0.08 1.45 W 1.000 0.00 37.0 4 2.72XE
ADUB1PN SHZ 01 A 74.2 322 90 P 3 62.83 12.99 12.52 0.00 0.47 0.36 W 0.999 0.00 98.0 3.69 E
B073 PB EHZ -- A123.9 133 90 P 2 70.46 20.62 20.62 0.00 0.00 0.73 W 1.000 0.00 59.0 3.26 E