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Californians remember the devastating earthquake that struck 100 years ago. At 5:12 Tuesday morning, sirens sounded through the city of San Francisco. Residents were marking the moment a century ago when a powerful earthquake shook the city. On April 18, 1906, the“Great Quake” killed between 3,000 and 7,000 people, destroyed some 28,000 buildings and sparked fires that burned for three days. Nearly half of the city's residents were left homeless.

Thousands of people came out to observe the 100-year anniversary of the quake. The spectators included 11 people who survived the quake. Those people are more than 100 years old!

One resident marked the anniversary in an unusual way. At the Exploratorium science museum in San Francisco, an artist sculpted a trembling San Francisco neighbourhood out of Jell-O.

One Hundred Years Ago Today

When the quake struck 100 years ago, most of the city's 400,000 residents were still sleeping, so man