Event Number 2871

M3.5 km S of Tres Pinos, CA - 2025/12/22 23:32:28 36.646 -121.298 M3.5 5.6 16 km S of Tres Pinos, CA at 2025/12/22 23:32:28 UTC / 2025/12/22 15:32:28 PDT

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 3.8km (2.4 mi)
HYPO2K = 1.1km (0.7 mi) Magnitude = 0.2

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2025/12/22 23:32:28  36.646 -121.298  M3.5   5.6 16 km S of Tres Pinos, CA

EQPROC Summary:

2871 2025Dec22 2332 27.90  36.6237 -121.3304  1.21 0.40 29.5114.8 177  5
ADUB1 SHZ PN 01 2025Dec22 2332 45.20 P D0  89.9   1.01
B054  EHZ PB -- 2025Dec22 2332 53.98 P D1 157.4   0.79
B073  EHZ PB -- 2025Dec22 2332 47.00 P D2 106.8   0.36
B058  EHZ PB -- 2025Dec22 2332 33.96 P U0  29.5  -0.00
B057  EHZ PB -- 2025Dec22 2332 57.87 P ?3 190.3   0.49

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH-M RMS   ERH   ERZ  XMAG1 FMAG1 PMAG GEOID-DEP
 2025-12-22  2332 28.91  36 38.401 121W18.306  1.19  0.81 12.61 66.55        3.28  3.28E    1.18
                                                                                          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  30.3  Emb  171   6   4   4   0   5      -                          5  0.55 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
                                                     3.28      5  0.55 E     10  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 30.3 306  35  PU    33.96  5.05  5.51 0.00 -0.46  1.53  W  0.877 0.00 71.0   3.28 E                        
 ADUB1PN SHZ 01 A 90.3 319  35  PD    45.20 16.29 15.26 0.00  1.03* 1.53  W  0.428 0.00  111   3.83 E                        
 B073 PB EHZ -- A107.4 135  35  PD 2  47.00 18.09 18.03 0.00  0.06  0.77  W  0.999 0.00 59.0   3.24 E                        
 B054 PB EHZ -- A157.0 330  35  PD 1  53.98 25.07 26.09 0.00 -1.02* 1.15  W  0.693 0.00 55.0   3.23 E                        
 B057 PB EHZ -- A190.2 325  26  P  3  57.87 28.96 31.21 0.00 -2.25* 0.02  W  1.000 0.00 43.0 2 3.03 E                        

Event Files: December 2025