Errors from USGS Location and Magnitude:
EQPROC = 15.4km (9.6 mi)
HYPO2K = 7.9km (4.9 mi)
Magnitude = -0.5
USGS Report:
Date Time Lat Lon Mag Depth Location
-----------------------------------------------------------------------------------
2025/04/04 04:23:42 36.788 -121.359 M3.1 3.9 3 km S of Ridgemark, CA
EQPROC Summary:
2771 2025Apr 4 423 43.57 36.7035 -121.4964 7.80 0.02 13.0100.2 178 6
ATZ SHZ PN 01 2025Apr 4 423 52.19 P D0 46.8 0.00
GLFBZ SHZ PN 01 2025Apr 4 424 0.58 P D2 100.6 0.00
B058 EHZ PB -- 2025Apr 4 423 46.57 P U0 13.0 0.00
B054 EHZ PB -- 2025Apr 4 424 5.17 P ?3 142.7 -0.85
B057 EHZ PB -- 2025Apr 4 424 9.21 Pn?3 174.8 -0.89
B073 EHZ PB -- 2025Apr 4 424 3.92 PgD3 123.5 0.00
HYPO2K Report:
YEAR MO DA --ORIGIN-- --LAT N- --LON W-- DEPTH-M RMS ERH ERZ XMAG1 FMAG1 PMAG GEOID-DEP
2025-04-04 0423 43.56 36 44.071 121W25.534 3.31 0.01 2.16 6.67 3.59 3.59E 3.30
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 15.6 Emb 174 10 4 4 0 6 - 3 1.79 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
3.59 3 1.79 E 7 2 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 15.6 298 95 PU 46.57 3.01 3.02 0.00 -0.01 1.45 W 0.999 0.00 55.0 2.95 E
ATZ PN SHZ 01 A 50.1 303 91 PD 52.19 8.63 8.63 0.00 0.00 1.45 W 0.999 0.00 174 4.22 E
GLFBZPN SHZ 01 A101.8 321 90 PD 2 60.58 17.02 17.03 0.00 -0.01 0.73 W 1.000 0.00 11.0 4 1.61XE
B073 PB EHZ -- A122.4 135 90 PD 3 63.92 20.36 20.37 0.00 -0.01 0.36 W 1.000 0.00 35.0 2.75 E
B054 PB EHZ -- A142.5 332 90 P 3 65.17 21.61 23.64 0.00 -2.03* 0.00 W 0.000 0.00 37.0 4 2.83XE
B057 PB EHZ -- A175.4 326 66 P 3 69.21 25.65 28.91 0.00 -3.26* 0.00 W 0.000 0.00 1.00 4