Fault Activity Map of California
Identification Information
Section Index
Citation:
Citation Information:
Originator: Charles W. Jennings and William A. Bryant
Publication Date: 2010
Title: Fault Activity Map of California
Edition: Version 2.0 (California Geological Survey 150th Anniversary Edition)
Series Information:
Series Name: Geologic Data Map, 1:750,000 Scale
Issue Identification: GDM Map No. 6
Publication Information:
Publication Place: Sacramento, California
Publisher: Department of Conservation, California Geological Survey
Other Citation Details: Digital Preparation by: Milind Patel, Ellen Sander, Jim Thompson, Barbara Wanish, Milton Fonseca, and Carlos Gutierrez.
Description:
Abstract:
This digital database contains the faults shown on the Fault Activity Map of California by Charles W. Jennings and William A. Bryant published in 2010. The map shows locations of known faults that can be portrayed at 1:750,000 scale and indicates the latest age when displacements took place, according to available data. The displacements may have been associated with earthquakes or may have been the result of gradual creep along the fault surface. The faults are separated into five categories: historic, Holocene, late Quaternary, Quaternary, and pre-Quaternary.
The 2010 Fault Activity Map of California presents a much more detailed depiction of faults in California than previous versions. In order to preserve as much of the original detail as possible, most faults active in the Quaternary (2.6 Ma) were digitized from their original sources (geologic maps ranging from 1:12,000 to 1:250,000 scale). However, due to limitations associated with printing the map at the 1:750,000 scale, some of the fault traces have been simplified or omitted. For a complete, unsimplified database of Quaternary faults, refer to the Digital Database of Quaternary and Younger Faults from the Fault Activity Map of California, Version 2.0 (Bryant, 2005; http://www.conservation.ca.gov/cgs/information/publications/Pages/quaternaryfaults_ver2.aspx).
Purpose:
To provide information for those concerned with land use on or near geologic faults in California.
Supplemental Information:
A significant difference from the 1994 version of the Fault Activity Map of California is the method of fault compilation. Almost all of the Quaternary faults shown in the 2010 version of the Fault Activity Map have been digitally compiled from original-scale source maps (1:12,000 to 1:250,000) used for the 1975 and 1994 maps, as well as more recent mapping when available. This compilation method insures that locations of these faults are more accurate than those depicted on previous editions of the Fault Activity Map. The Pre-Quaternary faults remain the same as in the 1994 version.
The geographic information system (GIS) files in this data package were created using ESRI ArcGIS. The *.gdb file is an ESRI File Geodatabase, version 10.1. The *.shp files are ESRI Shapefiles which were exported from the file geodatabase using ArcMap's "export" functionality. The *.dbf, *.prj, *.sbn and *.shx files support the *.shp files and contain necessary and important data that are referenced by the *.shp file. The *.mxd file is an ESRI Map Document file, which controls the display of data from the ESRI geodatabase, in this case using the same colors and symbols as the printed map. The Map Document file can be opened only with ESRI ArcGIS 10.1 or later. The ESRI Shapefiles can be opened with a wide variety of commercial and open-source GIS software, including Geomedia, GRASS GIS, MapInfo and Quantum GIS. The Shapefiles and Geodatabase contain the same geologic data.
Time Period of Content:
Time Period Information:
Currentness Reference: 2010
Status:
Progress: Complete
Maintenance and Update Frequency: Irregular
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -125
East Bounding Coordinate: -114.125
North Bounding Coordinate: 42
South Bounding Coordinate: 32.5
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: 750k
Theme Keyword: fault activity
Theme Keyword: faults
Theme Keyword: map
Theme Keyword: geology
Place:
Place Keyword Thesaurus: none
Place Keyword: California
Place Keyword: USA
Access Constraints: To ensure currentness, this dataset must be obtained from the Department of Conservation, California Geological Survey.
Use Constraints:
Upon receipt of this data set, all users are subject to copyright restrictions as follows: copyright 2010 Department of Conservation, California Geological Survey. All rights reserved. No part of this dataset may be reproduced, transmitted, or distributed in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of the California Geological Survey except as follows. Permission is granted to reproduce under the following conditions: 1) for personal use, 2) for publication in a report in unmodified form; cite on figure or in text as "Reproduced with permission from [title], [authors], [date], California Geological Survey", and 3) for publication in a report in modified form; cite on figure or in text as "Modified from [title], [authors], [date], California Geological Survey". (See above for appropriate title, authors, and date.)
Data Set Credit: Department of Conservation, California Geological Survey
Data Quality Information
Section Index
Attribute Accuracy:
Attribute Accuracy Report: Data were checked against the original source materials by the author(s).
Quantitative Attribute Accuracy Assessment:
Attribute Accuracy Explanation: Although every effort was made to maintain and ensure the accuracy of this dataset, several potential sources of error remain.
Logical Consistency Report: Map elements were visually checked by the author(s) for errors.
Completeness Report: Some simplification was necessary to make a legible map at the 1:750,000 scale. Faults not representable at this scale were omitted.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
Users of this dataset should be aware of the inherent potential for error in the processes of plotting, drafting, and digitization. For example, a plotting error of one line width equal to 0.5 mm at 1:750,000 scale could cause a location error of approximately 375 meters on the ground. Users should also be aware of the difference between precision and accuracy. While digital data can be reproduced precisely at any scale, the accuracy of the data remains constant.
Lineage:
Process Step:
Process Description:
Process Date: 2009 to 2010
Spatial Data Organization Information
Section Index
Direct Spatial Reference Method: Point and Vector
Spatial Reference Information
Section Index
Horizontal Coordinate System Definition:
Planar:
Map Projection:
Map Projection Name: EPSG:3310 - NAD83 California (Teale) Albers
Albers Equal Area:
Standard Parallel: 34.0
Standard Parallel: 40.5
Longitude of Central Meridian: -120.0
Latitude of Projection Origin: 0
False Easting: 0
False Northing: -4000000.0
Planar Coordinate Information:
Planar Coordinate Encoding Method: Coordinate Pair
Planar Distance Units: meters
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 1980
Semi-major Axis: 6378137.0
Denominator of Flattening Ratio: 298.257222101
Entity and Attribute Information
Section Index
Overview Description:
Entity and Attribute Overview:
This electronic database contains ArcGIS Feature Classes representing the following layers:
(Note: these Feature Classes (except *_Anno) have also been exported as ESRI Shapefiles)
Fault References Annotation Layer: FAM_Fault_References_Anno
Labels reference data source.
Fault Annotation Layer: FAM_Fault_Anno
Surface Rupture Annotation Layer: FAM_Surface_Rupture_Anno
Labels for Surface Rupture Points.
Surface Rupture Points Layer: FAM_Surface_Rupture_Point
Points indicate locations of surface rupture.
Slip Point Layer: FAM_Triggered_Slip_Point
Points indicate locations of triggered slip.
Structural Discontinuity Layer: FAM_Structural Discontinuity
Line features represent lines of structural discontinuity.
Pre-Quaternary Faults Layer: FAM_PreQt_Faults
Line features represent faults that are thought to have only been active in Pre-Quaternary time.
Quaternary Faults Layer: FAM_Qt_Faults
Line features represent faults active within the Quaternary.
Brawley Seismic Zone Layer: FAM_Brawley_Seismic_Zone
Polygon feature representing the approximate extent of the Brawley Seismic Zone.
Fault Creep Layer: FAM_Fault_Creep
Polygon features representing zones of fault creep.
Fault Buffers Layer: FAM_Buffers
Buffer polygons derived from features in the Quaternary Faults layer. Polygon color indicates age of most recent known activity.
Entity and Attribute Detail Citation:
Feature Class: FAM_Fault_References_Anno
TextString field contains a code pointing to a bibliographic entry
Feature Class: FAM_Fault_Anno
TextString field records fault name
Feature Class: FAM_Surface_Rupture_Anno
TextString field records date of surface rupture
Feature Class: FAM_Surface_Rupture_Point
EQ_Name field records name of earthquake
EQ_Date field records date of earthquake that caused surface rupture
FLT field records name of fault along which earthquake occurred
QFLT_ID field records fault ID for the National Quaternary Fault and Fold database
RUPT_EP field records rupture endpoints
LABEL field records year of surface rupture
LOC_Cert field records confidence in positional accuracy.
ANGLE field records orientation of symbol
Feature Class: FAM_Triggered_Slip_Point
EQ field records the name of the earthquake which triggered the slip
FAULT field records the name of the fault along which the earthquake occurred
DATE_ field records date of earthquake
LABEL field records year of earthquake
ENDPOINT field records value identifying relative position of point; possible values:
N: North;point represents northern endpoint of fault
S: South; point represents southern endpoint of fault
na: Unspecified endpoint
ANGLE field records orientation of symbol
Feature Class: FAM_Structural_Discontinuity
LTYPE field identifies feature as a line of structural discontinuity
Feature Class: FAM_PreQt_Faults
LTYPE field records line type; possible field values:
fault, approx. located: approximately located fault
fault, certain: well located fault
fault, concealed: concealed fault
thrust fault, approx. located: approximately located thrust fault
thrust fault, approx. located, queried: approximately located fault; queried to indicate uncertainty
thrust fault, certain: well located thrust fault
FLT_AGE field records age of fault; possible values:
PreQt: faults with pre-Quaternary displacement (older than 1.6 million years)
Override field records overrides to cartographic representation rules for each feature.
RuleID field records a reference to the cartographic representation rule for each feature; possible field values:
[2] fault, certain
[3] fault, approx. located
[4] fault, concealed
[5] thrust fault, certain
[6] thrust fault, approx. located
[7] thrust fault, concealed
[8] fault, certain (ball and bar): well located fault with ball and bar symbol displayed to indicate downthrown side (relative or apparent)
[9] fault, approx. located (ball and bar): approximately located fault with ball and bar symbol displayed to indicate downthrown side (relative or apparent)
[10] fault, concealed (ball and bar): concealed fault with ball and bar symbol displayed to indicate downthrown side (relative or apparent)
JEN_ID field records the ID number assigned by Jennings (1994), originally used as an id number to catalog changes from the 1975 version of the fault activity map, not intended as a comprehensive fault database numbering system.
Feature Class: FAM_Qt_Faults
LTYPE field records line type; possible LTYPE field values:
dextral fault, approx. located: approximately located dextral fault
dextral fault, certain: well located dextral fault
dextral fault, certain, barball: well located dextral fault; ball and bar symbol displayed to indicate downthrown side (relative or apparent)
dextral fault, concealed: concealed dextral fault
fault, approx. located: approximately located fault
fault, approx. located, barball: approximately located fault; ball and bar symbol displayed to indicate downthrown side (relative or apparent)
fault, approx. located (dip): approximately located fault; fault dip symbol displayed to indicate direction of dip
fault, certain: well located fault
fault, certain, barball: well located fault; ball and bar symbol displayed to indicate downthrown side (relative or apparent)
fault, certain (dip): well located fault; fault dip symbol displayed to indicate direction of dip
fault, concealed: concealed fault
fault, concealed, barball: concealed fault; ball and bar symbol displayed to indicate downthrown side (relative or apparent)
reverse fault, approx. located: approximately located reverse fault
reverse fault, certain: well located reverse fault
reverse fault, concealed: concealed reverse fault
sinistral fault, approx. located: approximately located sinstral fault
sinistral fault, concealed: concealed sinstral fault
sinstral fault, certain: well located sinstral fault
thrust fault, approx. located: approximately located thrust fault
thrust fault, approx. located, queried: approximately located thrust fault; queried to indicate uncertainty
thrust fault, certain: well located thrust fault
thrust fault, concealed: concealed thrust fault
FLT_AGE field records age of fault; possible values:
HIS - faults with historic displacement (last 200 years)
HOL - faults with Holocene displacement (last 11,000 years)
LTQT - faults with late Quaternary displacement (last 750,000 years)
QT - faults with undivided Quaternary displacement (last 1.6 million years)
FLT_NAME field records fault name
QFLT_ID field records fault ID for the National Quaternary Fault and Fold database
ZN_NAME field records name of fault zone
JEN_ID field records the ID number assigned by Jennings (1994), originally used as an id number to catalog changes from the 1975 version of the fault activity map, not intended as a comprehensive fault database numbering system.
SECT_NO field records alphanumeric numbering system used in National Quaternary Fault and Fold database to identify specific fault sections, which may be delineated by different fault ages, slip rates, fault geometry.
SECT_NAME field records the section name assigned in National Quaternary Fault and Fold database; corresponds to SECT_NO
FLT_SOURCE field records source of data
RuleID field records a reference to the cartographic representation rule for each feature; possible field values:
[5] fault, approx. located
[6] fault, approx. located, queried
[7] fault, certain
[8] fault, concealed
[9] fault, concealed, queried
[10] fault, inferred, queried
[31] thrust fault, certain
[32] thrust fault, approx. located
[33] thrust fault, concealed
[35] dextral fault, certain
[36] dextral fault, approx. located
[37] dextral fault, concealed
[38] sinistral fault, certain
[39] sinistral fault, approx. located
[40] sinistral fault, concealed
[41] thrust fault, certain (2)
[42] thrust fault, approx. located (2)
[43] thrust fault, concealed (2)
[47] fault, certain (ball and bar): bar symbol displayed to indicate downthrown side (relative or apparent)
[48] fault, approx. located (ball and bar): ball and bar symbol displayed to indicate downthrown side (relative or apparent)
[49] fault, concealed (ball and bar): ball and bar symbol displayed to indicate downthrown side (relative or apparent)
[50] dextral fault, certain (ball and bar): bar symbol displayed to indicate downthrown side (relative or apparent)
[51] fault, concealed, queried (ball and bar): bar symbol displayed to indicate downthrown side (relative or apparent)
[52] fault, concealed, queried (ball and bar, 2): bar symbol displayed to indicate downthrown side (relative or apparent)
[53] fault, certain (dip): fault dip symbol displayed to indicate direction of dip
[54] fault, approx. located (dip): fault dip symbol displayed to indicate direction of dip
[55] fault, concealed (dip): fault dip symbol displayed to indicate direction of dip
[56] reverse fault, approx. located
[57] reverse fault, certain
[58] reverse fault, concealed
Override field records overrides to cartographic representation rules for each feature.
Feature Class: FAM_BrawleySZ
ZN_NAME field records name of seismic zone
Feature Class: FAM_Fault_Creep
FLT_NAME field records name of fault
Feature Class: FAM_Buffers
AGE field records age of fault that buffer corresponds to; possible values:
HIS - faults with historic displacement (last 200 years)
HOL - faults with Holocene displacement (last 11,000 years)
LTQT - faults with late Quaternary displacement (last 750,000 years)
QT - faults with undivided Quaternary displacement (last 1.6 million years)
Distribution Information
Section Index
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Department of Conservation, California Geological Survey
Contact Address:
Address: P.O. Box 2980
City: Sacramento
State or Province: CA
Postal Code: 95812-2980
Distribution Liability:
The data in this package are provided by the Department of Conservation, California Geological Survey, as is. Any express or implied warranties,
including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall the
Department of Conservation, California Geological Survey, or its associated contributors be liable for any direct, indirect, incidental, special, exemplary,
or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business
interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) that arise in
any way out of the use of these data, even if advised of the possibility of such damage.
Although the data in this package have been produced and processed by professional scientists and organizations, the Department of Conservation, California
Geological Survey, makes no warranty, express or implied, regarding the data or its use. The Department of Conservation, California Geological Survey, shall
not be held liable for improper or incorrect use of the data described and/or contained herein.
Standard Order Process:
Digital Form:
Digital Transfer Information:
Format Name: ESRI File Geodatabase and ESRI Shape Files
Format Version Number: 10.2
Digital Transfer Option:
Available Time Period:
Metadata Reference Information
Section Index
Metadata Date: 11/01/2012
Metadata Review Date:
Metadata Future Review Date: N/A
Metadata Contact:
Contact Information:
Contact Person Primary:
Contact Person: Chris Wills
Contact Organization: Department of Conservation, California Geological Survey
Contact Position: Supervising Engineering Geologist
Contact Address:
Address Type: mailing and physical address
Address: 801 K St. MS 12-32
City: Sacramento
State or Province: California
Postal Code: 95814-3531
Country: USA
Contact Voice Telephone: (916) 323-8553
Contact Facsimile Telephone:
Contact Electronic Mail Address: Chris.Wills@conservation.ca.gov