The 1906 San Francisco Earthquake — Lawson Report & Seismic Hazard Intelligence

KBT-LAWSON-1906SFEQ-1.0

Core thesis The 1906 San Francisco earthquake provided the first systematic scientific opportunity to document a major fault rupture — and the observations of H.F. Reid in the Lawson Report led directly to the elastic rebound theory that remains the foundational model of earthquake generation.

Primary frameworks

• Elastic Rebound Theory — Reid's model: strain accumulation, sudden slip, and elastic rebound as the earthquake cycle
• Surface Rupture Mapping — systematic documentation of fault trace offset and displacement
• Site Effect Documentation — early empirical evidence for amplification on soft sediments
• Seismic Intensity Distribution — isoseismal map construction from field observations and questionnaires
• Fault Segmentation — San Andreas Fault as a segmented structure with variable slip in 1906
• Urban Earthquake Impact Assessment — fire vs. shaking as damage mechanisms and their relative contribution
• Post-Earthquake Science Model — the 1906 report as the template for post-earthquake scientific investigation

What this tile gives an agent:

• Apply elastic rebound theory to explain the earthquake cycle and recurrence
• Interpret surface rupture mapping data for fault hazard characterization
• Reason about site amplification effects on building damage distribution
• Apply 1906 lessons to modern urban earthquake preparedness and scenario planning
• Use the Lawson Report as the historical foundation for understanding the San Andreas Fault system