Event Number 2821

M2.5 km E of Woodside, CA - 2025/10/23 23:27:41 37.431 -122.240 M2.5 4.3 1 km E of Woodside, CA at 2025/10/23 23:27:41 UTC / 2025/10/23 16:27:41 PDT

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 3.5km (2.2 mi)
HYPO2K = 1.1km (0.7 mi) Magnitude = -0.1

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2025/10/23 23:27:41  37.431 -122.240  M2.5   4.3 1 km E of Woodside, CA

EQPROC Summary:

2821 2025Oct23 2327 40.66  37.4100 -122.2691  1.50 0.03 10.0 47.2 201  5
LCGPZ SHZ PN 01 2025Oct23 2327 43.18 P ?0  10.0  -0.00
GLFBZ SHZ PN 01 2025Oct23 2327 43.46 P ?1  11.1  -0.00
B054  EHZ PB -- 2025Oct23 2327 50.21 P U1  50.4  -0.00
B057  EHZ PB -- 2025Oct23 2327 53.81 P ?2  73.4  -0.30
B058  EHZ PB -- 2025Oct23 2327 56.66 P ?2  91.1  -0.39

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH-M RMS   ERH   ERZ  XMAG1 FMAG1 PMAG GEOID-DEP
 2025-10-23  2327 41.47  37 25.278 122W14.967  1.48  0.18  5.13 16.77        2.59  2.59E    1.47
                                                                                          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   8.4  Emb  199   5   1   5   0   5      -                          4 -0.07 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
                                                     2.59      4 -0.07 E     11  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
 LCGPZPN SHZ 01 A  8.4   5  35  P     43.18  1.71  1.88 0.00 -0.17  1.71  W  0.616 0.00 30.0   2.32 E                        
 GLFBZPN SHZ 01 A  9.1  73  35  P  1  43.46  1.99  1.99 0.00  0.00  1.28  W  0.999 0.00 57.0 1 2.94 E                        
 B054 PB EHZ -- A 48.9   5  35  PU 1  50.21  8.74  8.46 0.00  0.28  1.28  W  0.406 0.00 25.0   2.35 E                        
 B057 PB EHZ -- A 72.8 338  35  P  2  53.81 12.34 12.35 0.00 -0.01  0.58  W  0.992 0.00 23.0   2.29 E                        
 B058 PB EHZ -- A 91.1 139  35  P  2  56.66 15.19 15.32 0.00 -0.13  0.14  W  0.985 0.00 1.00 4                               

Event Files: October 2025