Event Number 2438

M2.5 km ESE of Alum Rock, CA - 2023/04/09 10:21:21 37.338 -121.698 M2.5 7.5 12km ESE of Alum Rock, CA at 2023/04/09 10:21:21 UTC / 2023/04/09 03:21:21 PDT

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 1.3km (0.8 mi)
HYPO2K = 0.5km (0.3 mi) Magnitude = -0.2

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2023/04/09 10:21:21  37.338 -121.698  M2.5   7.5 12km ESE of Alum Rock, CA

EQPROC Summary:

2438 2023Apr 9 1021 21.40  37.3268 -121.6946 11.50 0.07 26.3 56.5 207  6
MTUMZ SHZ PN 01 2023Apr 9 1021 26.58 P U0  26.3  -0.15
ADUB1 SHZ PN 01 2023Apr 9 1021 26.79 P U0  26.7  -0.00
ATZ   SHZ PN 01 2023Apr 9 1021 29.51 P U0  42.7   0.09
B058  EHZ PB -- 2023Apr 9 1021 32.11 P D1  59.4   0.03
B057  EHZ PB -- 2023Apr 9 1021 39.02 P ?3 109.4  -0.17
B054  EHZ PB -- 2023Apr 9 1021 34.18 P D0  74.2  -0.05

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH-M RMS   ERH   ERZ  XMAG1 FMAG1 PMAG GEOID-DEP
 2023-04-09  1021 21.78  37 20.111 121W42.030  8.71  0.10  1.95  9.06        2.73  2.73E    8.68
                                                                                          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  26.6  Emb  205   6   5   5   0   6      -                          5  0.52 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
                                                     2.73      5  0.52 E     34  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
 ADUB1PN SHZ 01 A 26.6 249 105  PU    26.79  5.01  4.95 0.00  0.06  1.05  W  0.565 0.00 41.0   2.73 E                        
 MTUMZPN SHZ 01 A 26.7 221 105  PU    26.58  4.80  4.96 0.00 -0.16  1.05  W  0.596 0.00 23.0   2.18 E                        
 ATZ  PN SHZ 01 A 43.4 205  99  PU    29.51  7.73  7.61 0.00  0.12  1.05  W  0.978 0.00 64.0   3.25 E                        
 B058 PB EHZ -- A 60.4 169  96  PD 1  32.11 10.33 10.35 0.00 -0.02  0.79  W  0.878 0.00 27.0   2.43 E                        
 B054 PB EHZ -- A 73.1 324  95  PD    34.18 12.40 12.40 0.00  0.00  1.05  W  0.980 0.00 27.0   2.45 E                        
 B057 PB EHZ -- A108.3 316  93  P  3  39.02 17.24 18.11 0.00 -0.87* 0.00  W  0.000 0.00 11.0 4 1.62XE                        

Event Files: April 2023