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Stockton Street from Union Square, looking toward Market Street
The San Francisco earthquake of 1906 was a major earthquake that struck San Franciscomarker, CAmarker and the coast of Northern California at 5:15 A.M. on Wednesday, April 18, 1906. The most widely accepted estimate for the magnitude of the earthquake is a moment magnitude (Mw) of 7.8; however, other values have been proposed, from 7.7 to as high as 8.25. The main shock epicenter occurred offshore about 2 miles (3 km) from the city, near Mussel Rockmarker. It ruptured along the San Andreas Faultmarker both northward and southward for a total of 296 miles (477 km). Shaking was felt from Oregonmarker to Los Angelesmarker, and inland as far as central Nevadamarker. The earthquake and resulting fire is remembered as one of the worst natural disasters in the history of the United Statesmarker. The death toll from the earthquake and resulting fire, estimated to be above 3,000, is the greatest loss of life from a natural disaster in California's history. The economic impact has been compared with the more recent Hurricane Katrina.


Houses damaged by the earthquake
At the time, 376 deaths were reported; the figure was fabricated by government officials who felt that reporting the true death toll would hurt real estate prices and efforts to rebuild the city; additionally, hundreds of casualties in Chinatownmarker went ignored and unrecorded. Today, this figure has been revised to an estimate of at least 3,000. Most of the deaths occurred in San Francisco itself, but 189 were reported elsewhere in the Bay Areamarker; nearby cities, such as Santa Rosamarker, San Josemarker and Stanfordmarker, also suffered severe damage. In Monterey County, the earthquake permanently shifted the course of the Salinas River near its mouth. Where previously, the river emptied into Monterey Bay between Moss Landingmarker and Watsonvillemarker, it was diverted 6 miles south to a new outlet just north of Marinamarker.

Between 225,000 and 300,000 people were left homeless out of a population of about 410,000; half of the people who evacuated (evacuees) fled across the bay to Oaklandmarker and Berkeleymarker. Newspapers at the time described Golden Gate Parkmarker, the Presidiomarker, the Panhandlemarker and the beaches between Ingleside and North Beach as being covered with makeshift tents. More than two years later in 1908, many of these refugee camps were still in full operation.

The earthquake and fire would leave a long-standing and significant impression on the development of California. At the time of the disaster, San Francisco had been the ninth-largest city in the United States and the largest on the West Coast, with a population of about 410,000. Over a period of 60 years, the city had become the financial, trade and cultural center of the West; operated the busiest port on the West Coast; and was the "gateway to the Pacificmarker", through which growing US economic and military power was projected into the Pacific and Asia. Over 80% of the city was destroyed by the earthquake and fire. Though San Francisco would rebuild quickly, the disaster would divert trade, industry and population growth south to Los Angeles, which during the 20th century would become the largest and most important urban area in the West. In addition, many of the city's leading poets and writers retreated to Carmel-by-the-Seamarker where, as "The Bohemians", they established the arts colony reputation that continues today.

The 1908 Lawson Report, a study of the 1906 quake led and edited by Professor Andrew Lawson of the University of California, showed that the very same San Andreas Faultmarker which had caused the disaster in San Francisco ran close to Los Angeles as well. The earthquake was the first natural disaster of its magnitude to be documented by photography and motion picture footage. Furthermore, it occurred at a time when the science of seismology was blossoming. The overall cost of the damage from the earthquake was estimated at the time to be around $400 million ($6.5 billion in 2009 dollars).

Damage to other towns
Although the impact of the earthquake on San Francisco is perhaps most famous, the earthquake also inflicted considerable damage on several other cities. These include San Josemarker, which suffered considerable damage, and Santa Rosamarker, the entire downtown of which was essentially destroyed.


The 1906 San Francisco earthquake was caused by a rupture on the San Andreas Faultmarker, a continental transform fault that forms part of the boundary between the Pacific Plate and the North American Plate. This fault runs the length of California from the Salton Seamarker in the south to Cape Mendocinomarker to the north, a distance of about 800 miles (1,300 km). The earthquake ruptured the northern third of the fault for a distance of 296 miles (477 km). The maximum observed surface displacement was about 20 feet (6 m); however, geodetic measurements show displacements of up to 28 feet (8.5 m).

A strong foreshock preceded the mainshock by about 20 to 25 seconds. The strong shaking of the main shock lasted about 42 seconds. The shaking intensity as described on the Modified Mercalli intensity scale reached VIII in San Francisco and up to IX in areas to the north like Santa Rosamarker where destruction was devastating.

There were decades of minor earthquakes – more than at any other time in the historical record for northern California – before the 1906 quake. Widely previously interpreted as precursory activity to the 1906 earthquake, they have been found to have a strong seasonal pattern and have been postulated to be due to large seasonal sediment loads in coastal bays that overlie faults as a result of the erosion caused by "hydraulic mining" in the later years of the California Gold Rush.

Subsequent fires

Burning of San Francisco, Mission District

As damaging as the earthquake and its aftershocks were, the fires that burned out of control afterward were much more destructive. It has been estimated that up to 90% of the total destruction was the result of the subsequent fires. Over 30 fires, caused by ruptured gas mains, destroyed approximately 25,000 buildings on 490 city blocks. Worst of all, many were started when firefighters, untrained in the use of dynamite, attempted to demolish buildings to create firebreaks, which resulted in the destruction of more than 50% of the buildings that would have otherwise survived. The city's Fire Chief, Dennis T. Sullivan, who would have been responsible, had died in the initial quake. The dynamited buildings themselves often caught fire. In all, the fires burned for four days and nights.

Due to a widespread practice by insurers to indemnify San Francisco properties from fire, but not earthquake damage, most of the destruction in the city was blamed on the fires. Some property owners deliberately set fire to damaged properties, in order to claim them on their insurance; this ultimately served no purpose, as wealthier citizens of the city shouldered the costs of repairing an estimated 80% of the city. Capt. Leonard D. Wildman of the U.S. Army Signal Corps reported that he "was stopped by a fireman who told me that people in that neighborhood were firing their houses...they were told that they would not get their insurance on buildings damaged by the earthquake unless they were damaged by fire."

As water mains were also broken, the city fire department had few resources with which to fight the fires. Several fires in the downtown area merged to become one giant inferno. Brigadier General Frederick Funston, commander of the Presidio of San Franciscomarker and a resident of San Francisco, tried to bring the fire under control by detonating blocks of buildings around the fire to create firebreaks with all sorts of means, ranging from black powder and dynamite to even artillery barrages. Often the explosions set the ruins on fire or helped spread it.

One landmark building lost in the fire was the Palace Hotel, subsequently rebuilt, which had many famous visitors, including royalty and celebrated performers. It was constructed in 1875 primarily financed by Bank of California co-founder William Ralston, the "man who built San Francisco". In April 1906, the world's greatest tenor, Enrico Caruso, and members of the Metropolitan Opera Company came to San Francisco to give a series of performances at the Tivoli Opera House. The night after Caruso's performance in Carmen, the tenor was awakened in the early morning in his Palace Hotel suite by a strong jolt. Clutching an autographed photo of President Theodore Roosevelt, Caruso made an effort to get out of the city, first by boat and then by train, and vowed never to return to San Francisco. He kept his word. The Metropolitan Opera Company lost all of its travelling sets and costumes in the earthquake and ensuing fires.

Some of the greatest losses from fire were in scientific laboratories. Alice Eastwood, the Curator of Botany at the California Academy of Sciencesmarker in San Francisco, is credited with saving nearly 1,500 specimens, including the entire type specimen collection for a newly discovered and extremely rare species, before the remainder of the largest botanical collection in the western United States was consumed by fire. The entire laboratory and all the records of Benjamin R. Jacobs, a biochemist who was researching the nutrition of everyday foods, was lost. Another treasure lost in the fires was the original California flag used in the 1846 Bear Flag Revoltmarker at Sonoma, which at the time was being stored in a state building in San Francisco.

The army's role in the aftermath

Famous painting Thank God For the Soldiers.
Period piece depicting US Army soldiers bringing in critical supplies for the survivors.
Soldiers looting during the fire

The city's interim fire chief (the original one was killed when the earthquake first struck) sent an urgent request to the Presidiomarker, an Army post on the edge of the stricken city, for dynamite. Funston had already decided the situation required the use of troops. Collaring a policeman, he sent word to Mayor Schmitz of his decision to assist, and then ordered Army troops from as far away as Angel Islandmarker to mobilize and come into the City. Explosives were ferried across the Bay from the California Powder Works in what is now Herculesmarker.

During the first few days, soldiers provided valuable services patrolling streets to discourage looting and guarding buildings such as the US Mintmarker, post office, and county jail. They aided the fire department in dynamiting to demolish buildings in the path of the fires. The Army also became responsible for feeding, sheltering, and clothing the tens of thousands of displaced residents of the city. Under the command of Funston's superior, Major General Adolphus Greely, Commanding Officer, Pacific Division, over 4,000 troops saw service during the emergency. On July 1, 1906, civil authorities assumed responsibility for relief efforts, and the Army withdrew from the city.

On April 18, in response to riots among evacuees and looting, Mayor Schmitz issued and ordered posted a proclamation that "The Federal Troops, the members of the Regular Police Force and all Special Police Officers have been authorized by me to kill any and all persons found engaged in Looting or in the Commission of Any Other Crime." It is estimated that as many as 500 people were shot dead in the city, many of whom, it has been suggested, were not looting at all, but were attempting to save their own possessions from the advancing fire. In addition, accusations of soldiers themselves engaging in looting also surfaced.

Relocation and housing of displaced

The Army built 5,610 redwood and fir "relief houses" to accommodate 20,000 displaced people. The houses were designed by John McLaren, and were grouped in eleven camps, packed close to each other and rented to people for two dollars per month until rebuilding was completed. They were painted olive drab, partly to blend in with the site, and partly because the military had large quantities of olive drab paint on hand. The camps had a peak population of 16,448 people, but by 1907 most people had moved out. The camps were then re-used as garages, storage spaces or shops. The cottages cost on average $100–741 to put up. The $2 monthly rents went towards the full purchase price of $50. Most of the shacks have been destroyed, but a small number survived. One of the modest homes was recently purchased for more than $600,000.

One of the eleven temporary housing camps in 1906

Aftermath and reconstruction

Property losses from the disaster have been estimated to be more than $400 million. An insurance industry source tallies insured losses at $235 million (equivalent to $ in dollars ).

Political and business leaders strongly downplayed the effects of the earthquake, fearing loss of outside investment in the city which was badly needed to rebuild. In his first public statement, California governor George C. Pardee emphasized the need to rebuild quickly: "this is not the first time that San Francisco has been destroyed by fire, I have not the slightest doubt that the City by the Golden Gate will be speedily rebuilt, and will, almost before we know it, resume her former great activity." The earthquake itself is not even mentioned in the statement. Fatality and monetary damage estimates were manipulated.In the rush to rebuild the city, building standards were first made much more stringent, but soon after about a year, in fact lowered instead of strengthened "by upwards of 50%" according to historian Robert Hansen. The History Channel International series Mega Disasters attributes the rollback of the strict codes to complaints by contractors under duress from city fathers for the slow rate of reconstruction. In the report, the building codes were taken back off the books in only 13 months, while the official death toll was placed at a mere 379—which estimates raised plenty of eyebrows even at the time, as it was undoubtably theretofore the most photographed disaster known to mankind, and the damage suggests far more would have been trapped as is backed by anecdotal stories of many being trapped in fallen buildings then consumed by flames. For over forty years now, research by a San Francisco librarian has amassed a death toll well in excess of three thousand, and she has opined the effort will go on for years more. Part of the rush to rebuild was the desire to be ready for the Panama-Pacific International Exposition set to be hosted in 1915, and indeed by that year there was almost no visible damage to be seen in the city. The total disregard to earthquake safety plagues the city today, as a majority of buildings standing in the city today were built in the first half of the 20th century to the lax codes. Building standards did not reach even 1906 levels until the 1950s. A detailed analysis of the city today estimates that an earthquake less powerful than the 1906 quake would completely destroy many sections of the city and result in thousands of deaths.

Almost immediately after the quake (and even during the disaster), planning and reconstruction plans were hatched to quickly rebuild the city. Rebuilding funds were immediately tied up by the fact that virtually all the major banks had been sites of the conflagration, requiring a lengthy wait of seven-to-ten days before their fire-proof vaults could cool sufficiently to be safely opened without risk of spontaneous combustion. Tiny Bank of Italy, however, had no vault and evacuated its funds to the country and was the only bank able to provide liquidity in the immediate aftermath. Its president also immediately chartered and financed the sending of two ships to return with shiploads of lumber from Washington and Oregon mills which provided the initial reconstruction materials and surge; today that bank has been renamed as Bank of America.

The grander of citywide reconstruction schemes however, required investment from Eastern monetary sources, hence the spin and de-emphasis of the earthquake, the promulgation of the tough new building codes, and subsequent reputation sensitive actions such as the official low death toll. One of the more famous and ambitious plans came from famed urban planner Daniel Burnham. His bold plan called for, among other proposals, Haussmann-style avenues, boulevards, arterial thoroughfares that radiated across the city, a massive civic center complex with classical structures, and what would have been the largest urban park in the world, stretching from Twin Peaks to Lake Mercedmarker with a large atheneum at its peak. But this plan was dismissed at the time as impractical and unrealistic.

For example, real estate investors and other land owners were against the idea due to the large amount of land the city would have to purchase to realize such proposals. City fathers likewise attempted at the time to eliminate the Chinese population and export Chinatownmarker (and other poor populations) to the edge of the county where the Chinese could still contribute to the local taxbase. The Chinese occupants had other ideas and prevailed instead. Chinatown was rebuilt in the newer, modern, Western form that exists today. In fact, the destruction of City Hallmarker and the Hall of Records enabled thousands of Chinese immigrants to claim residency and citizenship, creating a backdoor to the Chinese Exclusion Act, and bring in their relatives from China.
Bird's-eye view, surrounding Ferry Building, looking west on Market Street.
Photographed from tower.
While the original street grid was restored, many of Burnham's proposals inadvertently saw the light of day, such as a neoclassical civic center complex, wider streets, a preference of arterial thoroughfares, a subway under Market Street, a more people-friendly Fisherman's Wharf, and a monument to the city on Telegraph Hillmarker, Coit Towermarker.

The earthquake was also responsible for the development of the Pacific Heights neighborhood. The immense power of the earthquake had destroyed almost all of the mansions on Nob Hillmarker except for the Flood Mansion. Others which hadn't been destroyed were dynamited by the Army forces aiding the firefighting efforts in attempts to create firebreaks. As one indirect result, the wealthy looked westward where the land was cheap and relatively undeveloped, and where there were better views and a consistently warmer climate. Constructing new mansions without reclaiming and clearing old rubble simply sped attaining new homes in the tent city during the reconstruction. In the years after the first world war, the "money" on Nob Hill migrated to Pacific Heights, where it has remained to this day.

Reconstruction was swift, and largely completed by 1915, in time for the Panama-Pacific Exposition which celebrated the reconstruction of the city and its "rise from the ashes".

Since 1915, the city has officially commemorated the disaster each year by gathering the remaining survivors at Lotta's Fountainmarker, a fountain in the city's financial districtmarker that served as a meeting point during the disaster for people to look for loved ones and exchange information.

International assistance and insurance payments

During the first few days after news of the disaster reached the rest of the world, relief efforts reached over $5,000,000. Londonmarker, England, had raised hundreds of thousands of dollars. Individual citizens and businesses donated large sums of money for the relief effort: Standard Oil gave $100,000; Andrew Carnegie gave $100,000; the Dominion of Canadamarker made a special appropriation of $100,000 and even the Bank of Canadamarker in Torontomarker gave $25,000. The US government quickly voted for one million dollars in relief supplies which were immediately rushed to the area, including supplies for food kitchens and many thousands of tents that city dwellers would occupy the next several years. These relief efforts, however, were not nearly enough to get families on their feet again, and consequently the burden was placed on wealthier members of the city, who were reluctant to assist in the rebuilding of homes they were not responsible for. All residents were eligible for daily meals served from a number of communal soup kitchens and citizens as far away as Idaho and Utah were known to send daily loaves of bread to San Francisco as relief supplies as co-ordinated by the railroads.

Insurance companies, faced with staggering claims of $250 million, paid out between $235 million and $265 million on policyholders' claims, often for fire damage only, since shake damage from earthquakes was excluded from coverage under most policies. At least 137 insurance companies were directly involved and another 17 as reinsurers. Twenty companies went bankrupt, and most excluded shake damage claims. However, Lloyds of Londonmarker reports having paid all claims in full, more than 50 million dollars and the insurance companies in Hartford, Connecticutmarker report also paying every claim in full; the Hartford Fire Insurance Company paying over 11 million dollars and Aetna Insurance Company almost $3 million.

The earthquake was the worst single incident for the insurance industry before the September 11, 2001 attacks, and the largest US relief effort ever to this day, including even Hurricane Katrina. After the 1906 earthquake, a global discussion arose concerning a legally flawless exclusion of the earthquake hazard from fire insurance contracts. It was pressed ahead mainly by re-insurers. Their aim was the globally uniform solution of the problem of earthquake hazard in fire insurance contracts. Until 1910, a few countries, especially in Europe, followed the call for an exclusion of the earthquake hazard from all fire insurance contracts. In the US, however, the question was discussed differently. But the traumatized public reacted with fierce opposition. On August 1, 1909, the California Senate enacted the California Standard Form of Fire Insurance Policy, which did not contain any earthquake clause. Thus the state decided that insurers would have to pay again if another earthquake was followed by fires. Other earthquake-endangered countries followed the California example.The insurance payments heavily affected the international financial system. Gold transfers from European insurance companies to policyholders in San Francisco led to a rise in interest rates, subsequently to a lack of available loans and finally to the Knickerbocker Trust Company crisis of October 1907 which led to the Panic of 1907.

Centennial commemorations

The 1906 Centennial Alliance was set up as a clearing-house for various centennial events commemorating the earthquake. Award presentations, religious services, a National Geographic TV movie, a projection of fire onto the Coit Tower, memorials, and lectures were part of the commemorations. The USGS Earthquake Hazards Program issued a series of Internet documents, and the tourism industry promoted the 100th anniversary as well.

Eleven survivors of the 1906 earthquake attended the centennial commemorations, including Irma Mae Weule who was the oldest survivor of the quake at the time of her death in 2008 at the age of 109. Vivian Illing (December 25, 1900 – January 22, 2009) was believed to be the second-oldest survivor at the time of her death, leaving Herbert Hamrol (January 10, 1903 – February 4, 2009) as the last known remaining survivor at the time of his death.

However, shortly after Hamrol's death, two more remaining survivors were discovered. Bill Del Monte, 103, and Jeannete Scola Trapani, 106, stated that they stopped attending events commemorating the earthquake when it became too much trouble for them. The discovery has opened up the possibility that there may still be more living survivors left that have not become public knowledge. Another survivor, Rose Cliver, 106, attended her first-ever earthquake reunion celebration, the 103rd anniversary of the earthquake, along with Del Monte on April 18, 2009.


For a number of years, the epicenter of the quake was assumed to be near the town of Olemamarker, in the Point Reyesmarker area of Marin Countymarker, because of evidence of the degree of local earth displacement. In the 1960s, a seismologist at UC Berkeleymarker proposed that the epicenter was more likely offshore of San Francisco, to the northwest of the Golden Gatemarker. However, the most recent analysis by the United States Geological Survey (USGS) shows that the most likely epicenter was very near Mussel Rockmarker on the coast of Daly Citymarker, an adjacent suburb just south of San Francisco. An offshore epicenter is supported by the occurrence of a local tsunami recorded by a tidal gauge at the San Francisco Presidiomarker; the wave had an amplitude of approximately 3 in (8 cm) and an approximate period of 40–45 minutes.

The most important characteristic of the shaking intensity noted in Lawson's (1908) report was the clear correlation of intensity with underlying geologic conditions. Areas situated in sediment-filled valleys sustained stronger shaking than nearby bedrock sites, and the strongest shaking occurred in areas of Bay where landfill failed in the earthquake (earthquake liquefaction). Modern seismic-zonation practice accounts for the differences in seismic hazard posed by varying geologic conditions.

The USGS estimates that the earthquake measured a powerful 7.8 on the moment magnitude scale. The earthquake caused ruptures visible on the surface for a length of 470 kilometers (290 miles). Modified Mercalli Intensities of VII to IX paralleled the length of the rupture, extending as far as 80 kilometers inland from the fault trace

In popular culture

The earthquake was the basis of the 1936 MGM film San Francisco, which starred Clark Gable, Jeanette Macdonald, and Spencer Tracy, who received a Academy Award for Best Actor in a Leading Role nomination for this film.

An epic Warner Bros. film entitled 1906 and directed by Brad Bird is currently in production. Based on the earthquake, it is adaption of the best-selling James Dalessandro novel of the same name.

The National Film Registry added a documentary of the footage of the earthquake, entitled "San Francisco Earthquake and Fire, April 18, 1906", to its list of American films for preservation. The film was selected along with 24 other films in 2005, and is currently one of 500 films recognized by the Registry.

See also


  1. USGS - The Great 1906 San Francisco Earthquake
  2. 1906 Earthquake: What was the magnitude?USGS Earthquake Hazards Program - Northern California, Accessed September 19, 2006
  3. 1906 Earthquake: How long was the 1906 Crack?USGS Earthquake Hazards Program - Northern California, Accessed September 3, 2006
  4. Timeline of the San Francisco Earthquake April 18 - 23, 1906, The Virtual Museum of the City of San Francisco
  5. John A. Kilpatrick and Sofia Dermisi, Aftermath of Katrina: Recommendations for Real Estate Research, Journal of Real Estate Literature, Spring, 2007
  6. William Bronson, The Earth Shook, The Sky Burned (San Francisco:Chroncile Books, 1996)
  7. Casualties and Damage after the 1906 earthquake USGS Earthquake Hazards Program - Northern California, Accessed September 3, 2006
  8. displays at the US Army Corps of Engineers Museum in Sausalito, CA
  9. Library of Congress P&P Online Catalog - Panoramic Photographs (
  10. A dreadful catastrophe visits Santa Rosa. Press Democrat, Santa Rosa, Calif
  11. Sta. Rosa [i.e. Santa Rosa] Courthouse
  12. The 1906 San Francisco Earthquake and Fire
  13. 1906 San Francisco Quake: How large was the offset?USGS Earthquake Hazards Program - Northern California, Accessed September 3, 2006
  14. Seasonal Seismicity of Northern California Before the Great 1906 Earthquake, (Journal) Pure and Applied Geophysics, ISSN 0033-4553 (Print) 1420-9136 (Online), volume 159, Numbers 1–3 / January, 2002, Pages 7–62.
  15. Stephen Sobriner, What really happened in San Francisco in the earthquake of 1906. charles died, 2006
  16. San Francisco Museum
  17. NPS Signal Corps History
  18. NY Times Obituary for Heinrich Conrad, April 27, 1909
  19. Alice Eastwood, The Coniferae of the Santa Lucia Mountains
  20. Double Cone Quarterly, Fall Equinox, volume VII, Number 3 (2004)
  21. The Journal of Industrial and Engineering Chemistry
  22. The Bear Flag, The Virtual Museum of the City of San Francisco
  23. Reality Times: 1906 San Francisco Earthquake Housing Is Valuable Piece Of History by Blanche Evans
  24. Casualties and damage after the 1906 Earthquake. United States Geological Survey. Accessed December 6, 2006
  25. San Francisco History The New San Francisco Magazine May 1906
  26. The Great Earthquake and Firestorms of 1906 Philip L. Fradkin
  27. Christoph Strupp, Dealing with Disaster: The San Francisco Earthquake of 1906,
  28. Great Earthquake and Fire of 1906: Its Effects on Chinatown Chinese Historical Society of America, Accessed December 2, 2006
  29. The Great 1906 San Francisco Earthquake and Fire Niderost, Eric, American History, April 2006, Accessed December 2, 2006
  30. The New York Herald (European Edition) of April 21, 1906, p. 2.
  31. R. K. Mackenzie, The San Francisco earthquake & conflagration. Typoscript, Bancroft Library, Berkeley, 1907.
  32. " Aetna At-A-Glance: Aetna History", Aetna company information
  33. For a list of these companies see Tilmann Röder, Rechtsbildung im wirtschaftlichen Weltverkehr. Das Erdbeben von San Francisco und die internationale Standardisierung von Vertragsbedingungen (1871-1914), p.341–351.
  34. The role of Lloyd's in the reconstruction Lloyd's of London, Accessed December 6, 2006
  35. See T. Röder, The Roots of the "New Law Merchant": How the international standardization of contracts and clauses changed business law,
  36. Kerry A. Odell and Marc D. Weidenmier, Real Shock, Monetary Aftershock: The 1906 San Francisco Earthquake and the Panic of 1907, The Journal of Economic History, 2005, vol. 64, issue 04, p. 1002–1027.
  37. 1906 Centennial Alliance
  38. National Geographic TV movie
  39. projection of fire onto the Coit Tower
  40. series of Internet documents
  41. 100th anniversary
  42. San Francisco Chronicle, 2009-02-07, Calling any '06 San Francisco quake survivors
  43. Officials unmoved by quake notoriety Daly City
  44. Tsunami Record from the Great 1906 San Francisco Earthquake, United States Geological Survey, 2008
  45. California Geological Survey - Seismic Hazards Zonation Program - Seismic Hazards Mapping regulations
  46. MMI ShakeMap of California for the 1906 San Francisco earthquake inferred from Lawson (1908) by Boatwright and Bundock (2005)


  • Double Cone Quarterly, Fall Equinox, volume VII, Number 3 (2004).
  • Wald, D.J., Kanamori, Hiroo, Helmberger, D.V., and Heaton, T.H., Source study of the 1906 San Francisco Earthquake, Bulletin of the Seismological Society of America, vol.83, no. 4, p. 981–1019, August 1993.
  • Winchester, Simon, A Crack in the Edge of the World: America and the Great California Earthquake of 1906. HarperCollins Publishers, New York, 2005. ISBN 0060571993

Contemporary disaster accounts

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