ShakeOut 2013 Response Planning

SCEC's research computing group used the ShakeOut 2013 event to practice creating useful earthquake and seismic hazard information for the SCEC community immediately after a large California event. We identified a series of digital data products that we can calculate using the software and system tools at SCEC, and posted the results on a SCEC wiki a soon as the results were available. We used one of the Northridge Near You event definitions, a scenario earthquake description for a San Bernardino M6.85, as the earthquake information available to us after a big event.

ShakeOut Home Page

• ShakeOut 2013 Home Page

Northridge Near You Events

• Northridge Near You UseIT Presentation
• NRNY Event Parameters

Data Product Requirements

Each Data Product must include:

• Hardcopy of data product in Intern Lab at SCEC
• Digital version of product (posted on wiki)
• Metadata file describing data product (posted on wiki)

Computational Data Product Targets

1. MMI CyberShake map for event [ Fig. 2]
2. Attenuation-relationship MMI ShakeMap (NRNY San Bernardino Event)
3. Attenuation-relationship PGV ShakeMap (NRNY San Bernardino Event)
4. Attenuation-relationship PGA ShakeMap (NRNY San Bernardino Event)
5. SCEC-VDO 3D Aftershock visualization
6. ShakeAlert Event Summary Test Result for Mainshock
7. Short Term Earthquake Probability (STEP) Map for next 24 hours
8. Shakecast RSS (Receive and Send)
9. BBP Source Description in SRF Format
10. BBP MMI ShakeMap (NRNY San Bernardino Event)
11. BBP PGV ShakeMap (NRNY San Bernardino Event)
12. BBP PGA ShakeMap (NRNY San Bernardino Event)

Results Available Within 8 Hours

1. CyberShake Map of Peak Spectral Acceleration at 3.0 Seconds for Same Event in CyberShake Catalog with CyberShake 13.4 CVM-S amplitudes at 200+ sites in Region.
2. Attenuation-relationship MMI ShakeMap (NRNY San Bernardino Event)
3. Attenuation-relationship PGV ShakeMap (NRNY San Bernardino Event)
4. Attenuation-relationship PGA ShakeMap (NRNY San Bernardino Event)
5. SCEC-VDO 3D Aftershock visualization
6. ShakeAlert Event Summary Test Result for Mainshock
7. Short Term Earthquake Probability (STEP) Map for next 24 hours
8. Shakecast RSS (Receive and Send)
9. BBP Source Description in SRC Format and Plot
10. BBP Source Description in SRF Format
11. BBP MMI ShakeMap (NRNY San Bernardino Event)
12. BBP PGV ShakeMap (NRNY San Bernardino Event)
13. BBP PGA ShakeMap (NRNY San Bernardino Event)

Results

Fig 1: Intensity Map and Source Parameters as given in UseIT Study.

Fig 2: Intensity Map based on Source Parameters and NGA Attenuation Relationship.

Fig 3: Distribution of Peak Spectral Acceleration at 3.0Seconds based on CyberShake 13.4 grounds motions.

Fig 4: Short-Term Earthquake Probability (STEP) Map for the 24hours after 11am PDT Oct 17th based using ANSS Catalog.

Fig 5: Slip Distribution and Rupture Progression produced by Rupture Generator for M6.85 event described in UseIT Intern Scenario, using input parameters that might be available within 15 minutes of a large event.

Fig 6: MMI map for event using Broadband Platform Peak Velocity and Acceleration converted to Instrumental Intensity using ShakeMap formula, based on a grid of approximately 468 stations with a 0.1 degree (approximately 11.1 km of latitude and 9.2 km of longitude) spacing between sites.

Fig 7: PGA map for event using NGA2008 attenuation relationship, based on a grid of approximately 11466 stations with a 0.02 degree (approximately 2.2 km of latitude and 1.9 km of longitude) spacing between sites.

Fig 8: PGA map for event using Broadband Platform Peak Acceleration, based on a grid of approximately 468 stations with a 0.1 degree (approximately 11.1 km of latitude and 9.2 km of longitude) spacing between sites.