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Earthquake and fire disaster

San Francisco earthquake and fire

A major San Andreas earthquake and ensuing fires destroyed much of San Francisco.

When
18 April 1906 and following days
Where
San Francisco Bay Area, California, United States
San Francisco in ruins after the earthquake and fires of April 1906.
San Francisco in ruins after the earthquake and fires of April 1906.

A major San Andreas earthquake and ensuing fires destroyed much of San Francisco.

01

Background

A growing city on an active fault system

San Francisco's buildings and services were exposed to major fault movement. Water supplies and transport were vulnerable to the same shaking that damaged homes, making emergency response dependent on networks that could fail together.[3]

02

What happened

  1. 18 April 1906

    Earthquake and spreading fires

    The early-morning shock ruptured a long section of the San Andreas Fault. Fires burned through damaged districts while broken water mains hindered firefighting. Destruction continued after the strongest shaking had ended.[3]

03

Impact & evidence

Human consequences

More than 3,000 deaths

USGS gives a death toll exceeding 3,000 and roughly 225,000 people left homeless. These estimates are much higher than early official counts. Fire accounted for much of the destruction following the earthquake.[2]

1906

The rupture extended far beyond the city

Strong shaking affected a broad stretch of northern California, not only San Francisco. Surface fault displacement and systematic observations of damaged structures gave investigators evidence for a regional geological event. The famous urban fires were one part of a disaster whose physical footprint reached far along the San Andreas Fault.[3]

04

Aftermath & legacy

Science and rebuilding

Investigators documented ground movement and structural damage, contributing to understanding of earthquake mechanics. Reconstruction restored the city but did not remove seismic risk. The disaster remains a reference for the relationship between buildings, lifelines, fire and emergency planning.[3]

Sources & image credits (3)
  1. Wikipedia — 1906 San Francisco earthquake ↗
  2. USGS: casualties and damage after the 1906 earthquake ↗
  3. USGS: facing the great disaster ↗

Chadwick, H. D · Public domain Image source ↗

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