Error: Field cannot left blank.
Error: Invalid entry. Do not use equal signs [=] or colons [:].
Error: Field cannot left blank.
Error: Invalid entry. Do not use equal signs [=] or colons [:].
- 2023 Updated Seismic Assessment
- Diablo Canyon Power Plant's Seismic Hazards
- Central Coastal California Seismic Imaging Project (CCCSIP) Findings
Exploring Studies from the Senior Seismic Hazard Analysis Committee
The Senior Seismic Hazard Analysis Committee conducts a variety of seismic studies on the area surrounding the Diablo Canyon Power Plant. Discover some of the findings.
Characterizing Seismic Sources
To learn about seismic source characterization by the Senior Seismic Hazard Analysis Committee, you can explore the committee's:
- Project Plans: Download Project Plan for Development of the Diablo Canyon Seismic Source Model Using SSHAC Level 3 Methodology (PDF, 1.58 MB)
- Documents and data: Senior Seismic Hazard Analysis Committee documents and data
- Workshops: Senior Seismic Hazard Analysis Committee workshops for this project
- Main Reports: Read Seismic Source Characterization for the Diablo Canyon Power Plant, San Luis Obispo County, California (ZIP, 188 MB)
- Appendices: View DCPP_SSC_Report_Appendices_Rev_A (ZIP, 36.4 MB)
Characterizing Ground Motion for the Southwestern U.S. (SWUS)
PG&E and the Arizona Public Service sponsor the Southwestern U.S. Ground Motion Characterization project. Details from this program include:
- Project plan: Download SOUTHWESTERN UNITED STATES GROUND MOTION CHARACTERIZATION SSHAC LEVEL 3 – Project Plan (PDF, 1.79 MB)
- Workshops: Senior Seismic Hazard Analysis Committee workshops for this project
- Practical Implementation Guidelines, including NUREG-2117 and NUREG-6372:
- The Main Report: Read SOUTHWESTERN UNITED STATES GROUND MOTION CHARACTERIZATION SSHAC LEVEL 3 – Technical Report (ZIP, 40.2 MB)
- Appendices: Download SWUS_GMC_TR_Appendices (ZIP, 164 MB)
Understanding the 3-D Velocity Model and Site Response for the DCPP
View the reports and data for the updated study from May 2015. The sources include:
- Main Report:UPDATE OF THE THREE-DIMENSIONAL VELOCITY MODEL FOR THE DIABLO CANYON POWER PLANT (DCPP) FOUNDATION AREA (ZIP, 20.3 MB)
- Appendices: Updated_3D_Vs_DCPP_Appendices_Rev0 (ZIP, 388 MB)
- Peer Review Report: Update of the three-dimensional velocity model for the Diablo Canyon Power Plant (DCPP) foundation Area, by Fugro Consultants Inc, May 2015 (PDF, 139 KB)
View the reports and data for the updated study from November 2015. The sources include:
- Main Report: Updated_3D_Vs_DCPP_Report_Rev1 (ZIP, 80.9 MB)
- Appendices: Updated_3D_Vs_DCPP_Appendices_Rev1 (ZIP, 164 MB)
- Analytical Site Response Report: DEVELOPMENT OF AMPLIFICATION FACTORS FOR THE DIABLO CANYON NUCLEAR POWER PLANT: SITE WIDE PROFILES (PDF, 2.62 MB)
Seismic Hazard Re-evaluation Report
Read the report known as Diablo Canyon Power Plant Screening, Prioritization and Implementation Details (SPID), or the Seismic Hazard Re-evaluation report. The entire report is available for download.
Discover the report created by the CCCSIP
- Read the executive summary of the CCCSIP. Download Executive Summary (PDF, 105KB)
- Read the technical summary. Download Technical Summary ( PDF, 1.10 MB)
Download the Chapter 1 files
Download the Chapter 2 files
- Download REPORT TITLE: DCPP 3D/2D Seismic Reflection Investigation of Structures Associated with the Northern Shoreline Seismicity Sublineament of the Point Buchon Region (PDF, 657 KB)
- Download Chapter 2: Figures (PDF, 29.5 MB)
- Download Chapter 2: Plates (PDF, 59.4 MB)
- Download Appendix A (PDF, 15.2 MB)
Download the Chapter 3 files
- Download REPORT TITLE: Offshore Low-Energy Seismic Reflection Studies in Estero Bay, San Luis Obispo Bay, and Point Sal Areas (PDF, 2.04 MB)
- Download Chapter 3: Figures (PDF, 40.2 MB)
- Download Chapter 3: Plates (PDF, 4.61 MB)
- Download Appendix A Supplemental Figures (PDF, 13.2 MB)
Download the Chapter 4 files
- Download PEPORT TITLE: Interpretation of Seismic-Reflection Data, Point Buchon to San Simeon Point (PDF, 663 KB)
- Download Chapter 4: Figures (PDF, 51.6 MB)
- Download Chapter 4: Plates (PDF, 135 MB)
Download the Chapter 5 files
- Download REPORT TITLE: Point Buchon Ocean Bottom Seismometer Project (PDF, 341 KB)
- Download Chapter 5: Figures (PDF, 12.4 MB)
- Download Chapter 5: Appendix A Sensitivity Study for Optimum OBS Station Locations (PDF, 40.9 MB)
Download the Chapter 6 files
Download the Chapter 7 files
- Download REPORT TITLE: ONSIP 2011 Data Report (PDF, 13.1 MB)
- Download Chapter 7: Figures (PDF, 79.4 MB)
- Download Chapter 7: Plates (PDF, 1.35 MB)
Download the Chapter 8 files
- Download PROJECT REPORT TITLE: PGEQ-PR-21 2012 3D Onshore Seismic Survey (PDF, 866 KB)
- Download Fugro Consultants, Inc. Project No. 04.79225400 2012 3D Onshore Seismic Survey Report (PDF, 101 MB)
Download the Chapter 9 files
- Download REPORT TITLE: Geologic Mapping and Data Compilation for the Interpretation of Onshore Seismic-Reflection Data (PDF, 962 KB)
- Download Chapter 9: Figures (PDF, 22.8 MB)
- Download Chapter 9: Plates (PDF, 35.2 MB)
- Download APPENDIX A: DAILY FIELD REPORTS (ELECTRONIC APPENDIX) (PDF, 6.51 MB)
- Download Chapter 9: Appendix E Plates (PDF, 31.2 MB)
Download the Chapter 10 files
- Download PROJECT REPORT PGEQ-PR-16 CCCSIP DCPP P- and S-Wave Foundation Velocity Report (PDF, 728 KB)
- Download Fugro Consultants, Inc. Project No. 04.79225400 2012 3D Onshore Seismic Survey Report (PDF, 7.82 MB)
Download the Chapter 11 files
- Download REPORT TITLE: Site Conditions Evaluation (PDF, 799 KB)
- Download Chapter 11: Figures (PDF, 7.72 MB)
Download the Chapter 12 files
Download the Chapter 13 files
- Download REPORT TITLE: Hazard Sensitivity and Impact Evaluation (PDF, 906 KB)
- Download Chapter 13: Figures (PDF, 2.78 MB)
Download the Chapter 14 files
Download the reference files
- Download Stratigraphic Framework for Assessment of Fault Activity Offshore of the Central California Coast Between Point San Simeon and Point Sal (PDF, 18.5 MB)
Find additional seismic report data
Access other seismic reports created by the SSHAC. Visit SSHAC* Studies for DCPP Seismic Hazard Update.
Visit the following external websites to view the data used to create the report:
- The NAMSS website has the marine data. The data is in the Pacific Gas and Electric Company section. The Offshore Pt. Buchon 2D data set can be directly downloaded from the website. These are large files and may take time to download. The size of the files is roughly 4GB. Because of the files’ size, the 3D data sets are available upon request from the agency. Please follow the instructions on the NAMSS page to request the data sets. Visit USGS National Archive of Marine Seismic Surveys (NAMSS).
- You can also obtain the land data. The report number is 14-027. Visit View Assembled/Active Source Datasets Inventory. You can access the report directly. Visit Index of /data/reports/2014/14-027. The page contains a “readme” file. This file describes the various data sets and the Onshore 2D-3D Data Processing Report. Because of the files’ size, the 3D data sets are available upon request from the agency. Use the Assembled Data Request form. Visit Assembled Data Request.
©2025 Pacific Gas and Electric Company
©2025 Pacific Gas and Electric Company