Event Number 2391

M2.0 m SE of Portola Valley, CA - 2023/01/20 06:25:57 37.374 -122.219 M2.0 7.0 2km SE of Portola Valley, CA at 2023/01/20 06:25:57 UTC / 2023/01/19 22:25:57 PDT

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 4.1km (2.6 mi)
HYPO2K = 8.7km (5.4 mi) Magnitude = -0.4

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2023/01/20 06:25:57  37.374 -122.219  M2.0   7.0 2km SE of Portola Valley, CA

EQPROC Summary:

2391 2023Jan20  625 57.82  37.3755 -122.2653 15.00 0.07 28.9 62.1 203  4
ADUB1 SHZ PN 01 2023Jan20  626  2.95 P D3  28.9  -0.79
B054  EHZ PB -- 2023Jan20  626  7.43 P D1  54.2   0.00
B057  EHZ PB -- 2023Jan20  626 10.78 P U2  77.1   0.00
B058  EHZ PB -- 2023Jan20  626 12.37 P U2  88.0   0.00

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH-M RMS   ERH   ERZ  XMAG1 FMAG1 PMAG GEOID-DEP
 2023-01-20  0625 57.41  37 20.565 122W18.730  8.60  0.04  1.75  7.37        2.36  2.36E    8.58
                                                                                          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  31.3  Emb  212   5   4   4   0   4      -                          1  0.00 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
                                                     2.36      1  0.00 E     15  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
 ADUB1PN SHZ 01 A 31.3 109 102  PD 3  62.95  5.54  5.67 0.00 -0.13  0.50  W  1.000 0.00 27.0   2.36 E                        
 B054 PB EHZ -- A 58.3   9  96  PD 1  67.43 10.02 10.01 0.00  0.01  1.50  W  0.999 0.00 3.00 4 0.31XE                        
 B057 PB EHZ -- A 79.2 344  94  PU 2  70.78 13.37 13.39 0.00 -0.02  1.00  W  1.000 0.00 1.00 4                               
 B058 PB EHZ -- A 88.7 132  94  PU 2  72.37 14.96 14.93 0.00  0.03  1.00  W  0.999 0.00 1.00 4                               

Event Files: January 2023