Magnitude 6.5 quake near San Simeon, CA
Last updated: 2018-03-26 17:50:56 UTC
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- Initial source parameters
- 3 components [closest Anza station]
- Vertical components [all Anza stations]
- Waveforms recorded at Mt. Soledad
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Translations
The Anza group at the University of California San Diego operates a broadband seismograph network consisting of 17 three component broadband seismograph stations centered near Anza, California (see map).
On Monday, December 22nd, 2003 at 11:15 AM (PST) we recorded a quake (preliminary mb 6.50) located near the city of San Simeon. There have been reports of building damage in the nearby town of Paso Robles, and some reports of road damage. A spokesman for Pacific Gas & Electric, the utility that serves the area, said about 10,000 customers were without power after the earthquake triggered rockslides that brought down power lines near San Luis Obispo.
Update 12/23/03 09:11 - Latest reports include 2 deaths related to falling debris in the town of Paso Robles after the main shock, plus numerous minor injuries such as broken bones, cuts and grazes. Building damage included the destruction of the second storey of the landmark clock tower in Paso Robles, with a total of 82 downtown buildings reporting damage in Paso Robles. Approximately 75,000 homes and businesses in San Luis Obispo and Santa Barbara counties were without power after the main shock, but service had been restored to all but 1,600 by Tuesday morning said Pacific Gas & Electric spokesman Bill Roake.
If you felt the quake, the USGS would like to know. Please add to the USGS "Did you feel it?" page.
View the most recent map of local events near San Diego or a slightly wider regional view of events recoded by ANZA, or a map of events recoded by ANZA from around the globe.
Source parameters for the recent event and associated aftershocks are shown below. The epicentral distance (distance separating the epicenter and the closest station in the recording network) for Anza is 347 km (3.12 degrees).
This map shows the mainshock (red star) and any associated aftershocks (orange stars). Anza network stations are blue triangles.
This map shows just the area surrounding Paso Robles, including the nearby cities of San Luis Obispo, Santa Maria and Lompoc. The mainshock is a red star and the aftershocks are orange stars. Fault-lines are in red, and major highways are in gray.
| Latitude | Longitude | Origin time (UTC) | Origin time (PDT) | Depth (km) | Magnitude | Author |
| 35.7100 | -121.1000 | (356) 2003-12-22 19:15:56 | (356) 2003-12-22 11:15:56 | 7.6 | 6.5mb | QED |
| 35.6440 | -121.0510 | (356) 2003-12-22 19:26:07 | (356) 2003-12-22 11:26:07 | 4.0 | 3.9ml | QED_weekly |
| 35.6470 | -121.0260 | (356) 2003-12-22 19:30:09 | (356) 2003-12-22 11:30:09 | 8.0 | 4.4ml | QED_weekly |
| 35.6450 | -121.0530 | (356) 2003-12-22 19:53:29 | (356) 2003-12-22 11:53:29 | 4.5 | 4.6ml | QED_weekly |
| 35.4103 | -120.8202 | (356) 2003-12-22 19:59:33 | (356) 2003-12-22 11:59:33 | 0.0 | 4.2ml | UCSD:vladik |
| 35.5440 | -120.9380 | (356) 2003-12-22 20:01:32 | (356) 2003-12-22 12:01:32 | 0.0 | 4.0ml | QED_weekly |
| 35.6910 | -121.1120 | (356) 2003-12-22 20:06:14 | (356) 2003-12-22 12:06:14 | 6.5 | 4.1ml | QED_weekly |
| 35.4680 | -121.3400 | (356) 2003-12-22 20:41:43 | (356) 2003-12-22 12:41:43 | 4.2 | 4.4ml | QED_weekly |
| 35.7130 | -121.0690 | (356) 2003-12-22 21:31:36 | (356) 2003-12-22 13:31:36 | 3.7 | 4.3ml | QED_weekly |
| 35.2088 | -120.8567 | (356) 2003-12-22 23:35:59 | (356) 2003-12-22 15:35:59 | 0.0 | 3.6ml | UCSD:vladik |
| 35.5290 | -120.8900 | (356) 2003-12-22 23:52:36 | (356) 2003-12-22 15:52:36 | 2.9 | 4.1ml | QED_weekly |
| 35.5299 | -120.6398 | (357) 2003-12-23 00:27:23 | (356) 2003-12-22 16:27:23 | 0.0 | 3.5ml | UCSD:vladik |
| 35.6890 | -121.1130 | (357) 2003-12-23 02:06:55 | (356) 2003-12-22 18:06:55 | 6.0 | 4.2ml | QED_weekly |
| 35.7090 | -121.0720 | (357) 2003-12-23 02:56:49 | (356) 2003-12-22 18:56:49 | 8.0 | 4.1ml | QED_weekly |
| 35.6990 | -121.1160 | (357) 2003-12-23 03:46:00 | (356) 2003-12-22 19:46:00 | 5.6 | 4.5mb | QED_weekly |
| 35.6670 | -121.1100 | (357) 2003-12-23 05:30:19 | (356) 2003-12-22 21:30:19 | 5.6 | 4.5mb | QED_weekly |
| 35.5250 | -120.9300 | (357) 2003-12-23 09:41:49 | (357) 2003-12-23 01:41:49 | 8.0 | 4.0ml | QED_weekly |
| 35.6960 | -121.1100 | (357) 2003-12-23 11:40:36 | (357) 2003-12-23 03:40:36 | 5.7 | 4.2ml | QED_weekly |
| 35.3639 | -120.8955 | (357) 2003-12-23 14:42:06 | (357) 2003-12-23 06:42:06 | 0.0 | 3.4ml | UCSD:vladik |
| 35.6540 | -121.0450 | (357) 2003-12-23 18:17:11 | (357) 2003-12-23 10:17:11 | 6.9 | 4.6ms | QED_weekly |
| 36.4265 | -120.3925 | (358) 2003-12-24 04:15:16 | (357) 2003-12-23 20:15:16 | 110.9 | 3.4ml | UCSD:vladik |
| 35.5237 | -120.9532 | (358) 2003-12-24 05:22:29 | (357) 2003-12-23 21:22:29 | 0.0 | 3.4ml | UCSD:vladik |
| 35.3402 | -120.9511 | (358) 2003-12-24 09:36:10 | (358) 2003-12-24 01:36:10 | 27.5 | 3.4ml | UCSD:vladik |
| 35.5974 | -120.8742 | (358) 2003-12-24 14:32:50 | (358) 2003-12-24 06:32:50 | 0.0 | 3.4ml | UCSD:vladik |
| 35.6570 | -121.1040 | (359) 2003-12-25 05:20:13 | (358) 2003-12-24 21:20:13 | 5.0 | 4.2ml | UCSD:vladik |
| 35.6520 | -121.0940 | (359) 2003-12-25 05:21:59 | (358) 2003-12-24 21:21:59 | 3.8 | 4.3ml | UCSD:vladik |
| 35.6570 | -121.0910 | (359) 2003-12-25 06:34:49 | (358) 2003-12-24 22:34:49 | 1.0 | QED_weekly | |
| 35.6602 | -120.5318 | (359) 2003-12-25 08:22:38 | (359) 2003-12-25 00:22:38 | 0.0 | 3.2ml | QED_weekly |
| 35.3468 | -121.1706 | (359) 2003-12-25 09:45:55 | (359) 2003-12-25 01:45:55 | 0.0 | 3.8ml | UCSD:vladik |
| 35.5788 | -121.2481 | (359) 2003-12-25 10:14:23 | (359) 2003-12-25 02:14:23 | 25.8 | 3.4ml | UCSD:vladik |
| 35.5530 | -120.8390 | (359) 2003-12-25 11:50:01.000 | 1.0 | 4.5mb | QED_weekly | |
| 35.5510 | -120.8544 | (359) 2003-12-25 14:14:45 | (359) 2003-12-25 06:14:45 | 19.2 | 3.3ml | UCSD:vladik |
| 35.2675 | -121.0804 | (359) 2003-12-25 18:23:33 | (359) 2003-12-25 10:23:33 | 0.0 | 3.5ml | UCSD:vladik |
| 35.4731 | -120.9208 | (360) 2003-12-26 15:38:47 | (360) 2003-12-26 07:38:47 | 0.0 | 3.7ml | UCSD:vladik |
| 35.4304 | -120.9282 | (361) 2003-12-27 21:29:40 | (361) 2003-12-27 13:29:40 | 0.0 | 3.8ml | UCSD:vladik |
| 35.6140 | -120.8970 | (362) 2003-12-28 01:47:46 | (361) 2003-12-27 17:47:46 | 5.6 | 3.8ml | QED_weekly |
| 35.6980 | -121.1370 | (363) 2003-12-29 09:05:05 | (363) 2003-12-29 01:05:05 | 7.0 | 3.8ml | QED_weekly |
| 35.7200 | -121.0970 | (363) 2003-12-29 18:05:51 | (363) 2003-12-29 10:05:51 | 5.4 | 3.8ml | QED_weekly |
| 35.7210 | -121.0920 | (364) 2003-12-30 06:19:44 | (363) 2003-12-29 22:19:44 | 5.3 | 3.6ml | QED_weekly |
| 35.5320 | -120.8020 | (364) 2003-12-30 18:44:05 | (364) 2003-12-30 10:44:05 | 1.1 | 3.3ml | QED_weekly |
| 35.6730 | -121.1300 | (364) 2003-12-30 21:17:40 | (364) 2003-12-30 13:17:40 | 4.0 | 3.6ml | QED_weekly |
| 35.7190 | -121.0730 | (365) 2003-12-31 04:12:10 | (364) 2003-12-30 20:12:10 | 5.6 | 3.7ml | QED_weekly |
| 35.7200 | -121.0580 | (001) 2004-01-01 11:13:29 | (001) 2004-01-01 03:13:29 | 3.4 | 3.8ml | QED_weekly |
| 35.7080 | -120.9720 | (001) 2004-01-01 14:03:08 | (001) 2004-01-01 06:03:08 | 0.0 | 3.6ml | QED_weekly |
| 35.6650 | -121.1060 | (001) 2004-01-01 23:21:30 | (001) 2004-01-01 15:21:30 | 4.0 | 3.8ml | QED_weekly |
| 35.6460 | -121.0830 | (002) 2004-01-02 06:40:21 | (001) 2004-01-01 22:40:21 | 3.8 | 3.7ml | QED_weekly |
| 35.7040 | -121.0610 | (002) 2004-01-02 06:44:31 | (001) 2004-01-01 22:44:31 | 4.6 | 3.5ml | QED_weekly |
| 35.7050 | -121.1530 | (002) 2004-01-02 10:44:51 | (002) 2004-01-02 02:44:51 | 3.0 | QED_weekly | |
| 35.7100 | -121.1500 | (002) 2004-01-02 10:47:390 | (002) 2004-01-02 02:47:39 | 3.0 | 4.2mb | QED |
| 35.7050 | -121.1480 | (002) 2004-01-02 10:53:39 | (002) 2004-01-02 02:53:39 | 3.0 | 3.6ml | QED_weekly |
| 35.6530 | -121.0960 | (003) 2004-01-03 22:28:52 | (003) 2004-01-03 14:28:52 | 0.0 | 3.4ml | QED_weekly |
| 35.7060 | -121.0580 | (003) 2004-01-03 09:09:49 | (003) 2004-01-03 01:09:49 | 5.5 | 3.5ml | QED_weekly |
| 35.6510 | -121.0950 | (004) 2004-01-04 05:43:51 | (003) 2004-01-03 21:43:51 | 2.4 | 3.7ml | QED_weekly |
| 35.6870 | -121.1050 | (004) 2004-01-04 23:17:15 | (004) 2004-01-04 15:17:15 | 5.7 | 3.5ml | QED_weekly |
| 35.7170 | -121.0490 | (005) 2004-01-05 10:24:50 | (005) 2004-01-05 02:24:50 | 4.4 | 3.5ml | QED_weekly |
| 35.6440 | -121.0780 | (006) 2004-01-06 06:39:29 | (005) 2004-01-05 22:39:29 | 0.1 | 3.8ml | QED_weekly |
| 35.7230 | -121.0910 | (006) 2004-01-06 18:28:38 | (006) 2004-01-06 10:28:38 | 5.6 | 3.9ml | QED_weekly |
| 35.6580 | -121.0520 | (007) 2004-01-07 10:54:09 | (007) 2004-01-07 02:54:09 | 3.1 | 3.5ml | QED_weekly |
| 35.6730 | -121.1150 | (009) 2004-01-09 00:07:34 | (008) 2004-01-08 16:07:34 | 5.0 | 3.5ml | QED_weekly |
| 35.5100 | -120.9310 | (010) 2004-01-10 04:09:31 | (009) 2004-01-09 20:09:31 | 4.0 | 3.5ml | QED_weekly |
| 35.6980 | -121.0430 | (010) 2004-01-10 09:10:45 | (010) 2004-01-10 01:10:45 | 5.5 | 3.2ml | QED_weekly |
| 35.5790 | -120.7970 | (014) 2004-01-14 01:09:16 | (013) 2004-01-13 17:09:16 | 5.0 | 3.7ml | QED_weekly |
| 35.5940 | -120.9000 | (017) 2004-01-17 09:41:26 | (017) 2004-01-17 01:41:26 | 0.0 | 3.4ml | QED_weekly |
| 35.7420 | -121.1130 | (018) 2004-01-18 17:57:07 | (018) 2004-01-18 09:57:07 | 6.9 | 3.2ml | QED_weekly |
| 35.6340 | -120.9180 | (019) 2004-01-19 11:13:54 | (019) 2004-01-19 03:13:54 | 9.6 | 3.1ml | QED_weekly |
| 35.6450 | -120.9380 | (019) 2004-01-19 22:36:45 | (019) 2004-01-19 14:36:45 | 7.7 | 3.5ml | QED_weekly |
| 35.5570 | -120.8320 | (021) 2004-01-21 06:25:58 | (020) 2004-01-20 22:25:58 | 0.0 | 3.5ml | QED_weekly |
| 34.7160 | -121.0780 | (021) 2004-01-21 22:11:19 | (021) 2004-01-21 14:11:19 | 4.6 | 3.0ml | QED_weekly |
| 35.7280 | -121.0680 | (023) 2004-01-23 00:34:18 | (022) 2004-01-22 16:34:18 | 1.3 | 3.4ml | QED_weekly |
The location and magnitude determined for this event are preliminary and are subject to change upon further review of seismic data.
You may also view a plot showing
Downloadable movies
Of local interest:
We operate a broadband station on Mt. Soledad.
At 11:16 (PST) station SOL recorded the P wave from this event.
Here is a view of that event as picked by our analyst. A pink "P" indicates a P wave arrival,
a pink "S" indicates an S wave arrival.
View a larger image showing the waveforms recorded at Mt. Soledad.
Visit the USGS website with additional links to seismic data for this event.
News Links
To search the internet for more information about this event, click on the button below:
Learn more about the Anza group (including who works here, other networks, nuclear tests in China/India/Pakistan).
Learn more about the ANZA network (includes more station information, research, etc).
![3 components [closest Anza station]](3comp_vert.gif){kind=link}
![Vertical components [all Anza stations]](Anza_verts.gif){kind=link}
