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Near Source Zones

This dataset presents areas where an additional factor should be used to reduce risk to property and life in the event of an earthquake. The near-source maps are based on research in which most buildings that collapse or have severe damage after an earthquake are located within five kilometers (three miles) of fault rupture. Based on this research, seismologists and engineers recommend additional reinforcement of buildings located within a few kilometers of historical ground ruptures. This dataset will be used to determine where additional reinforcement to buildings should take place in the County of Los Angeles.

This dataset can be downloaded here.

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Data Field Descriptions

GIS Source Information
Database Name: eGIS_Hazards
Feature Class Name: EGIS.CA_NEAR_SOURCE_ZONES
Feature Dataset Name (if applicable):
Reference Date:
Accuracy: Parcel
Update Frequency: As Needed
Access Constraints:None

Contact Information
Carrie Wiley
Geographic Information Systems Manager I
Los Angeles County
Department of Public Works
900 S Fremont Ave

Alhambra CA, 91803
cwiley@dpw.lacounty.gov
(626) 458-7355

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