Earthquake Early Warning
Contents
- 1 SCEC Earthquake Early Warning Activities
- 2 CISN ShakeAlert System
- 3 CISN EEW Testing System Development
- 4 Example Observations from ShakeMap RSS for Event (M5.0 )
- 5 Authorized Data Source
- 6 Test Event List 2010
- 7 Earthquake Wave Travel Time Curves
- 8 Ground Motion Intensity Scale
- 9 CTC Abstract for SCEC Annual Meeting 2010
- 10 EEW Graphics
- 11 Additional ShakeAlert Information
SCEC Earthquake Early Warning Activities
SCEC4 science plans emphasize the development and use of time-dependent seismic hazard analysis. SCEC is working to extend time-dependent seismic hazard analysis through application of EEW technologies.
CISN ShakeAlert System
SCEC is working with the California Integrated Seismic Network (CISN) in the development and evaluation of a prototype CISN EEW system.
CISN EEW Testing System Development
SCEC is working to developed automated CISN EEW performance evaluation system. This system, currently called the CISN Testing Center (CTC), is based on the testing framework developed on the SCEC CSEP project.
Example Observations from ShakeMap RSS for Event (M5.0 )
Authorized Data Source
The ShakeMap authorized data source may provide the observational data used to validate short term ground motion forecasts.
Test Event List 2010
* catalog=ANSS * start_time=2010/06/01,00:00:00 * end_time=2010/11/01,00:00:00 * minimum_latitude=32.00 * maximum_latitude=42.00 * minimum_longitude=-122.00 * maximum_longitude=-114.00 * minimum_magnitude=4.0 * maximum_magnitude=10 * event_type=E
Date Time Lat Lon Depth Mag Magt Nst Gap Clo RMS SRC Event ID ---------------------------------------------------------------------------------------------- 2010/06/02 16:07:48.08 32.0560 -115.1967 10.00 4.30 ML 12 0.22 CI 14732212 2010/06/03 18:10:04.03 32.6952 -115.9142 5.11 4.10 ML 43 0.23 CI 14733516 2010/06/10 22:07:12.97 32.0305 -115.1072 10.00 4.14 ML 7 0.28 CI 10699845 2010/06/11 20:51:11.69 32.3900 -115.1818 15.00 4.26 ML 17 0.29 CI 10700429 2010/06/12 15:29:25.45 37.4527 -117.5194 5.87 4.54 ML 25 96 53 0.14 NN 312414 2010/06/13 03:08:57.09 33.3833 -116.4158 12.48 4.90 ML 125 0.26 CI 10701405 2010/06/13 03:09:20.36 33.3920 -116.3947 5.57 4.23 ML 44 0.32 CI 10701413 2010/06/14 07:02:26.97 32.1803 -115.3155 10.00 4.69 ML 11 0.20 CI 10703133 2010/06/15 04:26:58.48 32.7002 -115.9213 5.41 5.72 Mw 52 0.28 CI 14745580 2010/06/15 04:36:07.63 32.6792 -115.9242 12.48 4.11 ML 49 0.37 CI 14745636 2010/06/15 04:59:45.53 32.6995 -115.9500 10.69 4.61 ML 71 0.33 CI 14745932 2010/06/15 05:34:16.83 32.7088 -115.9563 5.52 4.35 ML 68 0.28 CI 14746172 2010/06/15 08:14:47.02 32.6880 -115.9108 3.77 4.15 ML 67 0.30 CI 14747396 2010/06/17 09:05:38.19 32.0748 -115.0040 10.00 4.13 ML 9 0.40 CI 10160722 2010/06/25 06:37:52.80 32.6188 -115.7947 6.44 4.17 ML 50 0.31 CI 10724149 2010/07/06 16:38:05.23 32.2180 -115.3462 1.51 4.27 ML 16 0.23 CI 14776012 2010/07/07 23:53:33.53 33.4205 -116.4887 13.97 5.43 Mw 144 0.27 CI 10736069 2010/07/20 21:48:29.98 40.0764 -119.6219 11.75 4.22 ML 33 245 23 0.10 NN 314044 2010/07/30 11:13:46.81 38.6220 -118.2116 11.14 4.24 ML 19 189 27 0.11 NN 314505 2010/08/06 17:39:31.67 33.9790 -116.4432 7.66 4.05 ML 122 0.18 CI 10771621 2010/08/24 21:43:39.96 32.3633 -115.4110 10.00 4.22 ML 21 0.30 CI 10785477 2010/08/29 15:53:43.42 32.1803 -115.2930 10.00 4.28 ML 15 0.22 CI 10788765 2010/09/14 10:52:18.00 32.0485 -115.1982 10.00 4.96 Mw 14 0.21 CI 10798005 2010/09/15 06:09:53.38 32.1647 -115.2467 13.79 4.79 ML 12 0.20 CI 10798845 2010/09/20 00:30:02.40 32.0262 -115.1083 10.00 4.75 Mw 9 0.22 CI 14844244 2010/09/30 08:37:35.93 37.1385 -117.3803 8.47 4.42 ML 24 144 21 0.23 NN 317359 2010/10/05 21:22:46.52 37.1526 -117.3758 9.21 4.14 ML 13 164 19 0.12 NN 318065
Earthquake Wave Travel Time Curves
Ground Motion Intensity Scale
CTC Abstract for SCEC Annual Meeting 2010
Testing Regional-scale Ground Motion Estimates for the CISN ShakeAlert Project Philip Maechling, Maria Liukis, Thomas H. Jordan
Our SCEC research team has developed initial capabilities of the CISN Testing Center (CTC) as a part of the USGS-funded CISN ShakeAlert Project. The CTC is designed to compare regional-scale ground motion estimates, such as peak ground motion estimates, against observed ground motion data, for significant California Earthquakes. The CTC is designed to identify which ShakeAlert ground motion estimation methods produce the best fit to observed ground motions.
Scientific goals of the CTC include (a) development of consensus among SCEC researchers on meaningful measures of comparison between ground motion estimates and observations, (b) collection and analysis of ShakeAlert performance information, and (c) integration of standard Probabilistic Seismic Hazard Analysis (PSHA) terms and practices into EEW. The technical goal of the CTC is to develop an automated system that can comparing ground motion estimates against ground motion observations. The CTC system used the CSEP testing framework to automate the evaluation of CISN ShakeAlert rapid earthquake parameters including ground motion forecasts for each event.
As part of this year’s CTC development, we updated the CSEP Testing Framework to use the USGS ShakeMap RSS Feed as an authorized source of event-based ground motion observations. As ShakeAlert systems produces rapid ground motion estimates for significant California events, the CTC will evaluate those ShakeAlert ground motion estimates against CISN ground motion observation using goodness-of-fit algorithms defined by CISN scientific groups.
Our ShakeAlert ground motion forecast testing shares scientific and technical goals with several other SCEC activities including validation of attenuation relationships, synthetic ShakeMaps, velocity model and wave propagation model goodness of fit measures, and short term ground motion forecast testing. The CTC system is designed to support CISN ShakeAlert testing and to also be applicable for evaluation of other ground motion estimation methods.
