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 | |||||
75208142 | 2025/07/11 | 04:52:53.710 | 37.66980 | -121.42530 | 9.110 | 1.30 | - | - | 3F.0 | tech | 3D | gE | usgs | |
75208047 | 2025/07/10 | 20:57:36.850 | 37.06335 | -121.50234 | 7.052 | 0.90 | 1 | 1.93 | 3F.1 | tech | 3D | gE | usgs | |
75208002 | 2025/07/10 | 17:18:4.510 | 37.68559 | -118.93515 | 1.516 | 0.40 | 2 | 2.88 | 3F.1 | tech | 3D | gE | usgs | LVC |
75207902 | 2025/07/10 | 10:16:49.660 | 37.19776 | -119.76738 | 17.746 | 1.80 | 2 | 0.40 | 3F.1 | tech | 3D | gE | usgs | |
75207882 | 2025/07/10 | 08:47:50.600 | 37.52068 | -119.41285 | 11.979 | 1.10 | 2 | 0.51 | 3F.1 | tech | 3D | gE | usgs | |
75207787 | 2025/07/10 | 04:18:58.460 | 37.52543 | -118.98114 | 3.720 | 0.50 | 2 | 0.46 | 3F.1 | tech | 3D | gE | usgs | LVC |
75207767 | 2025/07/10 | 03:12:40.590 | 38.10592 | -118.84764 | 6.950 | 1.30 | 2 | 0.64 | 3F.1 | tech | 3D | gE | usgs | LVC |
75207757 | 2025/07/10 | 02:47:50.760 | 37.08950 | -119.71520 | 30.210 | 2.20 | - | - | 4F.0 | tech | 3D | gE | usgs | |
75207747 | 2025/07/10 | 01:50:10.910 | 36.48180 | -121.02750 | 7.600 | 1.10 | - | - | 2F.0 | tech | 3D | gE | usgs | |
75207707 | 2025/07/09 | 23:57:54.770 | 37.32716 | -122.13113 | 5.542 | 1.00 | 2 | 0.79 | 2F.1 | tech | 3D | gE | usgs | |
75207657 | 2025/07/09 | 21:41:42.760 | 35.97120 | -120.52950 | 5.840 | 0.60 | - | - | 2F.0 | tech | 3D | gE | usgs | |
75207597 | 2025/07/09 | 19:06:36.630 | 40.32020 | -124.79900 | 15.440 | 2.10 | - | - | 3F.0 | tech | 3D | gE | usgs | MTJ |
75207542 | 2025/07/09 | 15:38:38.450 | 40.28320 | -124.50850 | 19.670 | 2.90 | - | - | 4F.0 | tech | 3D | gE | usgs | MTJ |
75207522 | 2025/07/09 | 14:39:27.470 | 37.27616 | -121.65405 | 5.761 | 1.00 | 1 | 0.70 | 6F.1 | tech | 3D | gE | usgs | CAL |
75207502 | 2025/07/09 | 13:26:45.280 | 41.37530 | -122.11680 | 5.810 | 1.30 | - | - | 3F.0 | tech | 3D | gE | usgs | |
75207497 | 2025/07/09 | 13:20:25.120 | 36.67637 | -121.31380 | 4.889 | 0.90 | 1 | 3.29 | 2F.1 | tech | 3D | gE | usgs | |
75207457 | 2025/07/09 | 11:59:10.550 | 36.61513 | -121.07538 | 11.486 | 1.10 | 2 | 2.14 | 4F.1 | tech | 3D | gE | usgs | |
75207442 | 2025/07/09 | 10:21:27.650 | 37.04998 | -121.50351 | 9.106 | 0.70 | 1 | 3.07 | 3F.1 | tech | 3D | gE | usgs | |
75207382 | 2025/07/09 | 06:02:53.780 | 36.83810 | -121.56281 | 6.006 | 0.60 | 1 | 0.56 | 3F.1 | tech | 3D | gE | usgs | |
75207357 | 2025/07/09 | 05:14:51.020 | 37.38096 | -118.74220 | 4.325 | 0.90 | 2 | 0.41 | 5F.1 | tech | 3D | gE | usgs | LVC |
75208142 | 2025/07/11 | 04:52:53.710 | 37.66980 | -121.42530 | 9.110 | 1.30 | - | - | 3F.0 | tech | 3D | gE | usgs | |
75207597 | 2025/07/09 | 19:06:36.630 | 40.32020 | -124.79900 | 15.440 | 2.10 | - | - | 3F.0 | tech | 3D | gE | usgs | MTJ |
75207502 | 2025/07/09 | 13:26:45.280 | 41.37530 | -122.11680 | 5.810 | 1.30 | - | - | 3F.0 | tech | 3D | gE | usgs | |
75207442 | 2025/07/09 | 10:21:27.650 | 37.04998 | -121.50351 | 9.106 | 0.70 | 1 | 3.07 | 3F.1 | tech | 3D | gE | usgs | |
75207247 | 2025/07/08 | 21:41:45.020 | 37.32878 | -122.12887 | 5.515 | 0.90 | 1 | 0.77 | 2F.1 | tech | 3D | gE | usgs | |
75207232 | 2025/07/08 | 21:18:3.850 | 37.32683 | -122.13332 | 5.473 | 1.30 | 1 | 0.97 | 2F.1 | tech | 3D | gE | usgs | |
75207202 | 2025/07/08 | 20:54:17.620 | 37.10419 | -121.55828 | 6.326 | 0.70 | 2 | 2.24 | 3F.1 | tech | 3D | gE | usgs | CAL |
75207152 | 2025/07/08 | 18:19:9.530 | 38.99020 | -123.31270 | 5.880 | 1.10 | - | - | 2F.0 | tech | 3D | gE | usgs | |
75208047 | 2025/07/10 | 20:57:36.850 | 37.06335 | -121.50234 | 7.052 | 0.90 | 1 | 1.93 | 3F.1 | tech | 3D | gE | usgs | |
75208002 | 2025/07/10 | 17:18:4.510 | 37.68559 | -118.93515 | 1.516 | 0.40 | 2 | 2.88 | 3F.1 | tech | 3D | gE | usgs | LVC |
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