ShakeAlert Performance Testing System Overview CISN Testing Center (top right) retrieves a daily earthquake catalog from ANSS Data Center (bottom right)

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Presentation transcript:

ShakeAlert Performance Testing System Overview CISN Testing Center (top right) retrieves a daily earthquake catalog from ANSS Data Center (bottom right) and ShakeAlert performance logs from U.C. Berkeley (left). It then matches new ANSS events to Algorithm Alerts and Decision Module Alerts and plots (1) Event Performance summaries, and (2) Cumulative Performance Summaries at USC

Types of ShakeAlert Performance Summaries Currently Available Summaries posted online at:

Brawley Sequence ShakeAlerts Performance Summaries 26 August :33:00 UTC – 26 August :58:00 UTC

11 Cumulative Summaries for Elarms2 Era March 4 – Aug 27, 2012

12

13

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17 ANSS Events: Events in the ANSS catalog at the time the summary was generated that meet the listed criteria (e.g. after May 3, 2012, >= Mag 3.5, and NC or CI Network codes) Hits: Number of ANSS events with one or more ShakeAlerts within 60 seconds after origin time. Misses: Number of ANSS events with no ShakeAlerts within 60 seconds after origin time.

ShakeAlert performance summaries for M4+ Events in Aug 2012

Aug 6, Parkfield M4.5

Aug 8, 2012 – First Yorba Linda M4.5

Aug 8, 2012 – Second Yorba Linda M4.5

Useful Information to Help Interpretation of CTC Performance Summary Results CTC performance summaries are focused on ShakeAlert speed of operation and earthquake event parameter forecasts. No site specific ground motion performance summaries have been developed. CTC ShakeAlert performance summaries compare ANSS event parameters to ShakeAlert alert event parameter forecasts. No searching for “false alerts” is currently done. Because ANSS Catalog is considered the correct observation, the CTC waits 48 hours after events to let the earthquake parameters in the ANSS catalog for an event stop changing before generating CTC performance summaries. Cumulative summaries depend on the catalog filter criteria (date range, magnitude, and region) used to select ANSS catalog events. Currently, ANSS events are selected for Mag >= 3.5, Network ID NC or CI. And, we currently run for two time frames Sept 2011 through present and March 3, 2012 through present (considered the Elarms2 era). One pager event summaries are produced for new all ANSS events with Network ID NC or CI and Mag >= 3.0

URL to Latest Cumulative Summaries: Filenames: summary.eewTest_LocationError-Test_ShakeAlert.png summary.eewTest_LocationError-Test_ShakeAlert.xml summary.eewTest_MagnitudeDistribution-Test_ShakeAlert.png summary.eewTest_MagnitudeDistribution-Test_ShakeAlert.xml summary.eewTest_MagnitudeError-Test_ShakeAlert.pngsummary.eewTest_MagnitudeError-Test_ShakeAlert.png summary.eewTest_MagnitudeError- Test_ShakeAlert.xmlsummary.eewTest_MagnitudeError- Test_ShakeAlert.xml summary.eewTest_ObservedEventsMap-Test_ShakeAlert.png summary.eewTest_Speed-Test_ShakeAlert.png summary.eewTest_Speed-Test_ShakeAlert.xml 26

URL to Example Daily Summaries: Filenames: scec.eew.ShakeAlertTest.eewTest_LocationError-Test_ShakeAlert_2_8_2012.xml scec.eew.ShakeAlertTest.eewTest_LocationError-Test_ShakeAlert_2_8_2012.xml meta scec.eew.ShakeAlertTest.eewTest_MagnitudeDistribution-Test_ShakeAlert_2_8_2012.xml scec.eew.ShakeAlertTest.eewTest_MagnitudeDistribution- Test_ShakeAlert_2_8_2012.xml meta scec.eew.ShakeAlertTest.eewTest_MagnitudeError-Test_ShakeAlert_2_8_2012.xml scec.eew.ShakeAlertTest.eewTest_MagnitudeError-Test_ShakeAlert_2_8_2012.xml meta scec.eew.ShakeAlertTest.eewTest_ShakeAlertEvent-Test_CI png scec.eew.ShakeAlertTest.eewTest_ShakeAlertEvent-Test_CI png meta scec.eew.ShakeAlertTest.eewTest_ShakeAlertMagnitude-Test_Event png scec.eew.ShakeAlertTest.eewTest_ShakeAlertMagnitude-Test_Event png meta scec.eew.ShakeAlertTest.eewTest_Speed-Test_ShakeAlert_2_8_2012.xml scec.eew.ShakeAlertTest.eewTest_Speed-Test_ShakeAlert_2_8_2012.xml meta 27