Event Number 1578

M3.3 m NE of Alamo, CA at 2018/04/30 11:55:02 UTC / 2018/04/30 11:55:02 PDT

Error Map and Stations Used to Locate Event

Errors from USGS Location and Magnitude:

EQPROC = 23.6km (14.7mi)
HYPO2K = 23.6km (14.7mi) Magnitude = -0.2

USGS Report:

Date       Time       Lat    Lon      Mag    Depth                Location   
-----------------------------------------------------------------------------------
2018/04/30 11:55:02  37.874 -121.990  M3.3   6.8 4km NE of Alamo, CA

EQPROC Summary:

1578 2018Apr30 1155  4.82  37.7734 -122.2259  1.90 0.04 41.2 78.7 199  5
ADUB1 SHZ PN 01 2018Apr30 1155 16.33 P D0  62.4   0.00
MTUMZ SHZ PN 01 2018Apr30 1155 19.48 P ?3  74.8   1.05
ATZ   SHZ PN 01 2018Apr30 1155 21.43 P ?0  93.0   0.02
B057  EHZ PB -- 2018Apr30 1155 12.74 P U0  41.2   0.01
B058  EHZ PB -- 2018Apr30 1155 24.89 Pn?3 122.3  -0.60

HYPO2K Report:

 YEAR MO DA  --ORIGIN--  --LAT N-  --LON W--  DEPTH-M RMS   ERH   ERZ  XMAG1 FMAG1 PMAG GEOID-DEP
 2018-04-30  1155  5.69  37 46.70  122W13.77   1.88  0.24 15.83 21.51        3.46  3.46E    1.85
                                                                                          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  40.5  Emb  197   5   2   5   0   5      -                          4  0.32 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
                                                     3.46      4  0.32 E     30  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
 B057 PB EHZ -- A 40.5 314  65  PU    12.74  7.05  7.05 0.00  0.00  1.43  W  0.999 0.00 57.0   3.13 E                        
 ADUB1PN SHZ 01 A 62.9 159  65  PD    16.33 10.64 10.70 0.00 -0.06  1.43  W  0.997 0.00  107 1 3.76 E                        
 MTUMZPN SHZ 01 A 75.3 156  65  P  3  19.48 13.79 12.72 0.00  1.07* 0.36  W  0.178 0.00 5.00 4 0.82XE                        
 ATZ  PN SHZ 01 A 93.5 161  65  P     21.43 15.74 15.68 0.00  0.06  1.43  W  0.994 0.00  147   4.10 E                        
 B058 PB EHZ -- A122.9 151  65  P  3  24.89 19.20 20.46 0.00 -1.26* 0.36  W  0.829 0.00 53.0 1 3.15 E                        

Event Files: April 2018