Event Number 2446

M3.8 m S of Antioch, CA - 2023/04/20 03:35:47 37.948 -121.810 M3.8 16.4 6km S of Antioch, CA at 2023/04/20 03:35:47 UTC / 2023/04/19 20:35:47 PDT

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 14.7km (9.1 mi)
HYPO2K = 12.6km (7.8 mi) Magnitude = 0.5

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2023/04/20 03:35:47  37.948 -121.810  M3.8  16.4 6km S of Antioch, CA

EQPROC Summary:

2446 2023Apr20  335 45.48  38.0517 -121.7055  2.69 0.08 48.5114.3 247  9
LCGPZ SHZ PN 01 2023Apr20  335 59.36 P ?0  77.7  -0.08
ADUB1 SHZ PN 01 2023Apr20  336  1.86 P D0  92.6   0.01
MTUMZ SHZ PN 01 2023Apr20  336  3.05 P ?1 101.3  -0.07
ATZ   SHZ PN 01 2023Apr20  336  6.31 P D0 120.5   0.56
B054  EHZ PB -- 2023Apr20  335 54.50 P U0  48.5   0.00
B057  EHZ PB -- 2023Apr20  335 59.15 P U0  76.0   0.00
B058  EHZ PB -- 2023Apr20  336  7.55 Pn?2 139.6  -0.63 WAIF
B058  EHZ PB -- 2023Apr20  336  7.55 Pg?2 139.6  -1.16 WAIF
B073  EHZ PB -- 2023Apr20  336 25.35 PgD2 258.0  -0.65

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH-M RMS   ERH   ERZ  XMAG1 FMAG1 PMAG GEOID-DEP
 2023-04-20  0335 46.58  38  2.146 121W43.353  6.35  0.08  3.03  3.47        3.30  3.30E    6.32
                                                                                          SOURCE
 NSTA NPHS  DMIN MODEL GAP ITR NFM NWR NWS NVR REMRKS-AVH  N.XMG-XMMAD-T   N.FMG-FMMAD-T  L F X
    7    7  46.2  Emb  243   5   5   7   0   7                                 6  3.18 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
                                                     3.30      6  3.18 E     31  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
 B054 PB EHZ -- A 46.2 246  95  PU    54.50  7.92  8.02 0.00 -0.10  1.12  W  0.442 0.00 77.0   3.43 E                        
 B057 PB EHZ -- A 74.0 270  93  PU    59.15 12.57 12.53 0.00  0.04  1.12  W  0.884 0.00 65.0   3.30 E                        
 LCGPZPN SHZ 01 A 75.2 218  93  P     59.36 12.78 12.72 0.00  0.06  1.12  W  0.642 0.00 58.0   3.19 E                        
 ADUB1PN SHZ 01 A 90.4 195  92  PD    61.86 15.28 15.19 0.00  0.09  1.12  W  0.304 0.00  115 1 3.86 E                        
 MTUMZPN SHZ 01 A 99.2 190  92  P  1  63.05 16.47 16.61 0.00 -0.14  0.84  W  0.240 0.00 63.0 1 3.29 E                        
 ATZ  PN SHZ 01 A118.4 188  92  PD    66.31 19.73 19.74 0.00 -0.01  1.12  W  0.490 0.00  194 2 4.40 E                        
 B073 PB EHZ -- A257.2 153  48  PD 2  85.35 38.77 38.79 0.00 -0.02  0.56  W  0.994 0.00 1.00 4                               

Event Files: April 2023