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Modified Mercalli Intensity Maps for the 1906 San Francisco Earthquake Plotted in ShakeMap Format
Entry ID: USGS_OFR_2005_1135

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Abstract: This website presents Modified Mercalli Intensity maps for the great San
Francisco earthquake of April 18, 1906. These new maps combine two important
developments. First, we have re-evaluated and relocated the damage and shaking
reports compiled by Lawson (1908). These reports yield intensity estimates for
more than 600 sites and constitute the largest set of intensities ever compiled
for a single earthquake. Second, we use the recent ShakeMap methodology to map
these intensities. The resulting MMI intensity maps are remarkably detailed and
eloquently depict the enormous power and damage potential of this great

[Summary provided by the USGS.]
Related URL
Description: ShakeMaps from the Earthquake Hazards Program, U.S Geological Survey.
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Geographic Coverage
Spatial coordinates   
  N: 40.0   S: 34.0   E: -120.0   W: -124.0

Data Set Citation
Dataset Originator/Creator: John Boatwright and Howard Bundock
Dataset Title: Modified Mercalli Intensity Maps for the 1906 San Francisco Earthquake Plotted in ShakeMap Format
Dataset Release Date: 2005-04-05
Dataset Publisher: U.S. Geological Survey
Version: 1.0
Data Presentation Form: online files
Online Resource:
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Temporal Coverage
Start Date: 1906-04-18
Stop Date: 1906-04-18
ISO Topic Category
SEISMOGRAPHS Ancillary Description
Data Set Progress
Originating Center
Data Center
Open File Services Section, Publications Warehouse, Eastern Region, Publications, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 303-202-4200
Phone: 303-202-4210
Fax: 303-202-4188
Email: infoservices at
Contact Address:
USGS Information Services
Open-File Services Section
Box 25286
Federal Center
City: Denver
Province or State: CO
Postal Code: 80225-0286
Country: USA
Distribution Media: Online
Fees: No fees
Phone: (650) 329-5404
Email: mdiggles at
Contact Address:
U.S. Geological Survey
345 Middlefield Road
Mail Stop 531
City: Menlo Park
Province or State: CA
Postal Code: 94025
Country: USA
Boatwright, J. and D.K. Keefer, (2005). The distribution of violent shaking in the 1906 San Francisco earthquake (abs.), Seism. Res. Lett., 74, in press.
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Creation and Review Dates
DIF Creation Date: 2005-04-19
Last DIF Revision Date: 2017-08-24