Reports


Materials on this site and on the data maps may be used with proper attribution (CA EQ Clearinghouse/Name of Individual or Organizational Contributor) for non-commercial uses. Questions, contact EERI at eeri@eeri.org.

EERI Special Earthquake Report

This 28-page summary report describes the multidisciplinary findings of members of EERI and their colleagues who conducted reconnaissance through the California Earthquake Clearinghouse. The main chapters of the report include Clearinghouse Operations, Geosciences, Geotechnical Engineering, Lifelines, Performance of Structures, Emergency Response and Economic Impact.

Download:
EERI Special Earthquake Report on the M 6.0 South Napa Earthquake of August 24, 2014
4 MB pdf, web version
EERI Special Earthquake Report on the M 6.0 South Napa Earthquake of August 24, 2014
16 MB pdf, print resolution version

EERI-PEER Reconnaissance Briefing on the August 24, 2014 South Napa Earthquake (Monday, September 15, 2014)

On Monday, September 15, 2014 the Earthquake Engineering Research Institute (EERI) and the Pacific Earthquake Engineering Research Center (PEER) cohosted a reconnaissance briefing of preliminary observations from the August 24, 2014 South Napa Earthquake. The recording of the briefing is shown below along with the presentation slides from each of the speakers that can be downloaded as PDF files from the list below.

California Earthquake Clearinghouse

California Earthquake Clearinghouse After Action Report South Napa Earthquake (April 17, 2015)

Geotechnical Extreme Events Reconnaissance (GEER)

Geotechnical Engineering Reconnaissance of the August 24, 2014 M6 South Napa Earthquake, GEER Association Report No. GEER-037, in collaboration with the California Geological Survey, Pacific Earthquake Engineering Research Center, and U.S. Geological Survey, with support from NSF.

ASCE Technical Council on Lifeline Earthquake Engineering (TCLEE)

ASCE TCLEE Preliminary Reconnaissance Report of the August 2014 South Napa Earthquake. This report describes the performance of lifelines systems due to the Napa, California M 6.0 earthquake of August 24, 2014.

Pacific Earthquake Engineering Research Center (PEER)

PEER Preliminary Notes and Observations on the August 24, 2014, South Napa Earthquake. This report combines the result of extensive preliminary field reconnaissance and initial analysis of ground motion records obtained in the days following the August 24, 2014 South Napa earthquake. Contributions have been made by a large number of faculty, staff, and students affiliated with PEER and other research and educational groups.

2014 Structural Engineers Association of California (SEAOC) Convention: Special Session on Napa Earthquake (Friday, September 12)

On Friday, September 12, 2014 the Structural Engineers Association of California (SEAOC) hosted a special session dedicated to the South Napa Earthquake during their annual convention which took place in Indian Wells, CA, from 09/09/2014 to 09/13/2014.  Some of the presentation slides from the speakers in this Special Session can be downloaded as PDF files from the list below.

 

USGS Earthquake Science Center Seminar: Lessons from the South Napa Eqk

Visit the USGS seminar page to view a recording of the “Lessons from the South Napa Earthquake Seminar” held by the USGS on September 4, 2014. Presentations included the following topics and speakers. Links have been provided below for any slides received by the Clearinghouse.

  • Introduction – Jack Boatwright, USGS
  • Earthquake sequence, aftershock probabilities & EEW – Brad Aagaard, USGS
  • Aftershock sequence modeling – Andrea Llenos, USGS
  • Earthquake relocations – Jeanne Hardebeck, USGS
  • UAVSAR– Andrea Donnellan, NASA JPL
  • Surface rupture & ground failure – Dan Ponti, USGS
  • Geodetic signature and fault rupture models – Fred Pollitz, USGS
  • Ground motions – Annemarie Baltay, USGS
  • Aftershock instrument deployment – Brad Aagard, USGS
  • Damage – Erol Kalkan, USGS
  • Clearinghouse – Heidi Tremayne, EERI

Ground Motion Record Analysis and Comparison Reports

Strongest Ground Motions from M6 South Napa Earthquake by Dr. Praveen K. Malhotra, StrongMotions Inc.

Ground Motions from M6 South Napa Earthquake by Dr. Praveen K. Malhotra, StrongMotions Inc.

Ground Motion Record of NCSN2N016 from Aug.24, 2014 M6.0 South Napa,California Earthquake (Preliminary results, ver.1.0) by Erol Kalkan, USGS

South Napa Spectra by Holmes Culley Engineers

Instrumented Building and Ground Motion Recordings

Center for Engineering Strong Motion Data (CESMD) for South Napa 

CESMD Information for Strong-Motion Station San Francisco – 62-story Resid. Bldg (Station 58389)

CESMD Earthquakes Recorded By CESMD Station 58389

Structural Engineering Reports

SEAOC EPEP After-Action Retrospective: 2014 South Napa Earthquake by S. Adan, J. Hunt (October 2016)

Performance of Buildings and Nonstructural Components in the 2014 South Napa Earthquake prepared by Applied Technology Council, FEMA (February 2015)

Engineering Summary Report of the M6 South Napa Earthquake August 24, 2014 by MRP Engineering, LLC (September 2014)

Hospital Performance in the August 24, 2014 in the South Napa Earthquake Short Report by Ali Sumer, OSHPD EOC

OSHPD Shortened Preliminary Presentation on the South Napa Earthquake by OSHPD EOC

EERI Intern Napa Earthquake Observations by A.Julius, S.Labbouz, D.Martinelli, E.McAdams, and E.Vega

SEAOC PDPOC EPEP Preliminary Presentation on South Napa Earthquake by Jeffrey Hunt, Exponent

SEAOC PDPOC EPEP report on South Napa Earthquake Damage near Seimsmic Stations in Vallejo and Napa College by Jeffrey Kovach, Bevier Structural Engineering

SEAOC PDPOC EPEP Pictures of South Napa Earthquake Damage near Seismic Stations in Vallejo and Napa College by Jeffrey Kovach, Bevier Structural Engineering

Napa Downtown URM Reconnaisance Report by Adam Azofeifa, Jonas Houston

Historic Gordon Building Case Study: Pre- and Post-Quake 3D Laser Scanning by Shari Kamimori, 3D Virtual Design Technology, Inc. (October 16, 2014)

The 2014 South Napa Earthquake and its Relevance for New Zealand by Bruce Galloway1 and Jason M. Ingham (Bulletin of the New Zealand Society for Earthquake Engineering, Vol. 48, No. 1, March 2015)

Observations from Media

School Performance Observations from Media (updated Monday, September 8, 2014)

General Observations from Media (updated Wednesday, August 27, 2014)

Lifelines Observations from Media (updated Wednesday, August 27, 2014)

Clearinghouse Briefing #3 Report (Tuesday, August 26, 2014)

The Clearinghouse Briefing #3 Report, presented on August 26, 2014, contains update from teams in the field on Tuesday.
Clearinghouse Briefing #3 Summary Slideshow

Below is a list of preliminary report-outs from discipline-based teams that were presented at the Clearinghouse briefing:

Buildings: Commercial, Unreinforced Masonry
Team Members: Jonas Houston and Adam Azofeifa (Holmes Culley), and Brian Olson (Tipping Mar)
with Badri Prasad (TTG), Andre Barbosa and Ben Mason (OSU), Alex Julius and Erik McAdams (EERI)

Buildings: Commerical, Unreinforced Masonry (Team 2)
Team Members: Andre Barbosa and Ben Mason (OSU); Alex Julius and Erik McAdams (EERI)

Geosciences
Team Member: Wayne Haydon, California Geological Survey

Geosciences II
Team Members: Jennifer Thornburg and Jeremy Lancaster, California Geological Survey

Clearinghouse Briefing #2 Report (Monday, August 25, 2014)

The Clearinghouse Briefing #2 Report, presented on August 25, 2014, contains update from all teams in the field on August 25th and includes suggestions for additional investigations. Download the report here: Clearinghouse Briefing #2 Summary Slideshow.

Below is a list of preliminary report-outs from discipline-based teams that were presented at the Clearinghouse briefing:

Geosciences
Team members: Cooper Brossy, David Trench, and Mike Buga, Fugro Consultants

Geotechnical
Team Members: Keith Kelson and John Weslily

Buildings: Residential, Single Family
Team members: Veronica Crothers and Karl Telleen, Maffei Structural Engineering; Betsy Mathieson; and Simpson Strongtie Team

Buildings: Residential, Mobile Homes
Team Members: ABAG Team with Danielle Mieler, Mike Mieler, Michael Germeraad, and Dana Brechwald

Business Interruption in Downtown Napa
Team Members: RMS Team with Pooya Sarabandi and Petros Keshishian

Transportation: Bridges
Team Members: Kleinfelder Team with Zia Zafir and Bill McCormick

Nonstructural Damage
Team Member: Glen Granholm, ETC Building & Design, Inc.

Miscellaneous Reports

Sunday August 24th Structural Reconnaissance Overview in American Canyon, Napa, and Vallejo

Team Members: Bill Tremayne, Holmes Culley; and Marko Schotanus, Rutherford + Chekene

Napa Post Offices (photos only)
Team Member: Glen Granholm, ETC Building & Design, Inc.

News Articles

Consultant puts losses from Napa quake at $1 billion
Napa Valley Register: Using computer models, a catastrophic risk management firm estimates the south Napa earthquake caused an estimated $1 billion in damages …