1906 earthquake how long

Schmitz called for the enforcement of a dusk-to-dawn curfew and authorized soldiers to shoot-to-kill anyone found looting. Meanwhile, in the face of significant aftershocks, firefighters and U. By April 23, most fires were extinguished, and authorities commenced the task of rebuilding the devastated metropolis. It was estimated that some 3, people died as a result of the Great San Francisco Earthquake and the devastating fires it inflicted upon the city. But if you see something that doesn't look right, click here to contact us!

On April 18, , 16 Nepali mountaineering guides, most of them ethnic Sherpas, are killed by an avalanche on Mt.

It was the single deadliest accident in the history of the Himalayan peak, which rises more than 29, feet above sea level and lies across the border The U. The terrorist attack was carried out in protest of the U. In , a bloody civil war He had been called to Worms, Germany, to appear before the Diet assembly of the Holy Roman Empire and answer charges of heresy.

The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada, an area of approximately , square miles, nearly 8 times greater than that of the Loma Prieta earthquake magnitude 6. The ground motion propagating away from the earthquake source is recorded by instruments called seismographs. The zigzag trace made by a seismograph, called a "seismogram," reflects the changing amplitude and frequency content of the ground shaking beneath the instrument.

From seismograms, scientists can determine the time, the epicenter, the depth, and the type of faulting of an earthquake as well as estimate how much energy was released by it.

Although there were only five seismographs in the Bay Area in , the earthquake was recorded at a total of 96 stations around the world.

Bay Area seismograms are variable and highly complex mainly because the shaking was so intense and the instruments were not sufficiently damped. By comparison, the Loma Prieta earthquake had a rupture length of only 25 miles. The San Andreas fault today has locked and creeping segments along its approximately mile km length in California. The earthquake ruptured all locked segments of the fault in northern California. The amount of horizontal slip, or relative movement along the fault, varied from 2 to 32 feet 0.

To better visualize this, picture standing face to face with a person on the opposite side of the fault and watching them slide horizontally 32 feet to your right! The following file depicts the rupture length and the horizontal slip in feet along the rupture as a histogram. The great earthquake broke loose some 20 to 25 seconds later, with an epicenter near San Francisco.

Violent shocks punctuated the strong shaking which lasted some 45 to 60 seconds. The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada. One important characteristic of the shaking intensity noted in Lawson's 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 where ground reclaimed from San Francisco Bay failed in the earthquake. Modern seismic-zonation practice accounts for the differences in seismic hazard posed by varying geologic conditions.