August 24, 2014 South Napa Earthquake

OT Collection ID: OT.122014.26910.1
OT Collection Name: August 24, 2014 South Napa Earthquake
Short Name: NAPA_2014
Collection Platform: Airborne Lidar
Metadata Download:
  • ISO 19115 (Data)
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  • Download and Access Products:

    Point Cloud Data   Bulk Download     opentopoID: OTLAS.122014.26910.1

    Raster Data   Bulk Download     opentopoID: OTSDEM.122014.26910.1
    Collection Overview:

    The August 24, 2014, South Napa earthquake (M6.0) produced significant damage resulting from shaking, fault rupture, fault afterslip, and ground deformation. Lidar data were collected to aid specialized work on the South Napa earthquake including: (1) fault afterslip, especially in the Browns Valley residential neighborhood; (2) shaking and correlation to damage such as red- and yellow-tagged structures, especially in the downtown Napa area; (3) seismic hazards of the West Napa Fault System, especially in residential areas; and (4) geospatial analysis and imagery support (such as post-processing of lidar and other imagery that has already been acquired).

    Airborne lidar data and imagery were collected on September 9, 2014 as part of multi-agency/institutional response to the August 24, 2014 South Napa Earthquake. Details of the scientific response to this earthquake including the lidar acquisition can be found in Hudnut et al., 2014: USGS Special Open-File Report 2014-1249. Data were collected and initially processed by Towill and are available both as raw files and products as initially delivered by the vendor, as well as the USGS re-processed version of re-classified point clouds and 0.25 meter DEM's from the USGS HDDS Explorer. Point clouds available from USGS and OpenTopography were reclassified (metadata) by the US Geological Survey; this re-processing was funded by FEMA. Orthoimagery were collected by Towill on September 9, 2014, and by Google on August 24, 2014.

    Dataset Acknowledgement: Data collection was funded by the California Department of Water Resources, the US Geological Survey, the California Geological Survey, and PEER-GEER. More information about the data collection and application can be found in U.S. Geological Survey Open-File Report 2014-1249. Orthoimagery from Google is available via a creative commons license (CC by 4.0).

    Hudnut, K.W., Brocher, T.M., Prentice, C.S., Boatwright, J., Brooks, B.A., Aagaard, B.T., Blair, J.L., Fletcher, J.B., Erdem, J.E., Wicks, C.W., Murray, J.R., Pollitz, F.F., Langbein, J., Svarc, J., Schwartz, D.P., Ponti, D.J., Hecker, S., DeLong, S., Rosa, C., Jones, B., Lamb, R., Rosinski, A., McCrink, T.P., Dawson, T.E., Seitz, G., Rubin, R.S., Glennie, C., Hauser, D., Ericksen, T., Mardock, D., Hoirup, D.F., and Bray, J.D., 2014, Key recovery factors for the August 24, 2014, South Napa earthquake: U.S. Geological Survey Open-File Report 2014-1249, 51 p.,

    All lidar and orthophotography data collected, processed and delivered by Towill, Inc. under California Department of Water Resources (DWR) contract 4600008691 Task Order 6 dated August 29, 2014 for the South Napa, CA Earthquake research project is in the public domain. DWR and the other cost-share partners listed above shall not accept any liability for its accuracy, quality or suitability for use by any entity.

    Dataset Citation: N/A - Citation Guidance

    Dataset Keywords: South Napa earthquake, Napa, West Napa fault

    Survey Date: 09/09/2014

    Publication Date: 03/05/2015
    Total lidar returns: 1,904,250,588 pts

    Area: 78 km2

    Point Density: 24.41 pts/m2

        Class 1 - Unclassified5,657,915
        Class 2 - Ground1,227,268,916
        Class 4 - Medium Vegetation219,835,961
        Class 5 - High Vegetation377,810,087
        Class 6 - Building73,676,083
        Class 7 - Low Point (noise)1,626

    Raster Resolution: 0.5 meter

    Orthophoto Resolution: 0.2 meter

    Coordinates System:
        Horizontal: North American Datum 1983 UTM Zone 10N (NAD83) Meters [EPSG: 26910]
        Vertical: NAVD88 [EPSG: 5703]

    Survey Report:

    LAS Validation Data Report: NAPA_2014.html
    Dataset Extent in KMZ format: Download

    Dataset Spatial Bounds: North: 38.3509321917753°     South: 38.1076886699654°     East: -122.246134781087°     West: -122.365140468277°