IMPORTANT NOTE: A new comprehensive update of the Northern CA real-time double-difference catalog is available at https://nocaldd.ldeo.columbia.edu. The update includes a new base catalog (1984-2021) with hypocenter depths relative to the Geoid, consistent with USGS routine monitoring, and other improvements to the DD-RT system. We will retire this website soon.
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Faults of special interest:
Hayward Fault |
Calaveras Fault |
Parkfield
Earthquakes of special interest:
2023-08-10 M4.3 Parkfield
2022-10-25 M5.0 Calaveras
2021-07-08 M6.0 SmithValley
2020-08-19 M4.0 Willits
2015-08-17 M4.0 Fremont
2014-08-24 M6.0 South Napa
2012-10-21 M5.3 King City
2012-08-06 M4.4 Parkfield
2011-10-20 M4.0 Berkeley
Archived DDRT solutions:
2012:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2013:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2014:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2015:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2016:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2017:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2018:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2019:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2020:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2021:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2022:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2023:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2024:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
2025:
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec
Downloads:
Download the real-time double-difference catalog, Jan 2012 - present, here .
Download the double-difference base catalog, 1984-2011, here.
Search either catalog here.
Most recent events:
Events in queue: 0
Q: Quality of DDRT solution; DX: Shift between DD and network location (km); V: version (CISN.DD)
If Q='-': No DDRT solution computed.
tech: link to technical information; 3D: link to 3D viewer; gE: link to google Earth viewer
Faults/regions of special interest:
HAY = Hayward Fault; CAL = Calaveras Fault; PKF = Parkfield; LVC = Long Valley;
GGF = Geysers Geothermal Field; MTJ = Mendocino TJ
EVENT ID | DATE | TIME (UTC) | LAT | LON | DEPTH | ML | Q | DX | V | |||||
75202946 | 2025/07/01 | 05:55:40.310 | 37.70919 | -121.97760 | 9.255 | 3.00 | 1 | 2.69 | 3H.1 | tech | 3D | gE | usgs | |
75202936 | 2025/07/01 | 05:32:24.390 | 39.59870 | -121.44280 | 18.620 | 1.80 | - | - | 0A.0 | tech | 3D | gE | usgs | |
75202931 | 2025/07/01 | 05:29:19.290 | 38.73229 | -122.93708 | 2.230 | 1.00 | 2 | 0.67 | 0A.1 | tech | 3D | gE | usgs | |
75202926 | 2025/07/01 | 04:59:39.420 | 37.25220 | -121.63623 | 5.269 | 1.70 | 1 | 0.65 | 0A.1 | tech | 3D | gE | usgs | CAL |
75202921 | 2025/07/01 | 04:09:2.850 | 38.81829 | -122.84795 | 3.114 | 0.30 | 2 | 0.91 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202916 | 2025/07/01 | 03:16:32.370 | 38.83524 | -122.79767 | 2.429 | 0.20 | 1 | 0.73 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202911 | 2025/07/01 | 02:55:19.840 | 36.01452 | -120.09414 | 4.765 | 2.40 | 2 | 0.25 | 0A.1 | tech | 3D | gE | usgs | |
75202906 | 2025/07/01 | 02:26:50.950 | 38.81990 | -122.76156 | 2.743 | 0.80 | 1 | 0.95 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202901 | 2025/07/01 | 02:11:47.540 | 38.84136 | -122.82228 | 2.859 | 1.20 | 2 | 0.86 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202891 | 2025/07/01 | 02:09:10.840 | 37.04150 | -121.13050 | 1.950 | 1.40 | - | - | 0A.0 | tech | 3D | gE | usgs | |
75202886 | 2025/07/01 | 01:37:54.580 | 37.03812 | -121.12819 | 0.808 | 3.50 | 1 | 1.04 | 4F.1 | tech | 3D | gE | usgs | |
75202881 | 2025/07/01 | 01:16:3.700 | 38.82028 | -122.84539 | 3.239 | 0.90 | 2 | 0.96 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202876 | 2025/07/01 | 01:05:10.090 | 38.83521 | -122.82026 | 2.576 | 1.90 | 1 | 0.92 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202856 | 2025/07/01 | 00:32:11.380 | 38.83122 | -122.79666 | 4.117 | 0.80 | 2 | 1.31 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202836 | 2025/07/01 | 00:08:12.980 | 38.72300 | -123.03130 | 12.440 | 1.20 | - | - | 0A.0 | tech | 3D | gE | usgs | |
75202831 | 2025/07/01 | 00:04:19.740 | 40.21130 | -124.15500 | 1.920 | 0.90 | - | - | 0A.0 | tech | 3D | gE | usgs | MTJ |
75202826 | 2025/06/30 | 23:59:16.330 | 38.41430 | -122.60780 | 4.280 | 0.00 | - | - | 0A.0 | tech | 3D | gE | usgs | |
75202821 | 2025/06/30 | 23:50:9.350 | 38.82442 | -122.85709 | 2.728 | 0.30 | 2 | 0.50 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202801 | 2025/06/30 | 22:35:35.740 | 38.78887 | -122.89264 | 9.565 | 0.80 | 2 | 0.34 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202786 | 2025/06/30 | 22:24:59.890 | 38.76287 | -122.69596 | 3.059 | 0.70 | 1 | 1.49 | 0A.1 | tech | 3D | gE | usgs | GGF |
75201881 | 2025/06/28 | 20:15:51.890 | 37.15849 | -122.40680 | 10.764 | 1.30 | 2 | 0.17 | 2F.1 | tech | 3D | gE | usgs | |
75202946 | 2025/07/01 | 05:55:40.310 | 37.70919 | -121.97760 | 9.255 | 3.00 | 1 | 2.69 | 3H.1 | tech | 3D | gE | usgs | |
75202886 | 2025/07/01 | 01:37:54.580 | 37.03812 | -121.12819 | 0.808 | 3.50 | 1 | 1.04 | 4F.1 | tech | 3D | gE | usgs | |
75201856 | 2025/06/28 | 18:09:0.690 | 36.99340 | -121.65663 | 3.739 | 1.20 | 1 | 0.67 | 3F.1 | tech | 3D | gE | usgs | |
75201856 | 2025/06/28 | 18:09:0.690 | 36.99340 | -121.65663 | 3.739 | 1.20 | 1 | 0.67 | 2F.1 | tech | 3D | gE | usgs | |
75202936 | 2025/07/01 | 05:32:24.390 | 39.59870 | -121.44280 | 18.620 | 1.80 | - | - | 0A.0 | tech | 3D | gE | usgs | |
75202931 | 2025/07/01 | 05:29:19.290 | 38.73229 | -122.93708 | 2.230 | 1.00 | 2 | 0.67 | 0A.1 | tech | 3D | gE | usgs | |
75202926 | 2025/07/01 | 04:59:39.420 | 37.25220 | -121.63623 | 5.269 | 1.70 | 1 | 0.65 | 0A.1 | tech | 3D | gE | usgs | CAL |
75202921 | 2025/07/01 | 04:09:2.850 | 38.81829 | -122.84795 | 3.114 | 0.30 | 2 | 0.91 | 0A.1 | tech | 3D | gE | usgs | GGF |
75202916 | 2025/07/01 | 03:16:32.370 | 38.83524 | -122.79767 | 2.429 | 0.20 | 1 | 0.73 | 0A.1 | tech | 3D | gE | usgs | GGF |
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