Earthquake Centennial

Tens of thousands of spectators are expected to attend a wreath-laying ceremony in San Francisco today marking the centennial of the Great Quake.

The 1906 temblor killed as many as six thousand people and was one of the costliest disasters in U.S. history.

Meantime, memorials, a parade and an earthquake conference are among events on tap during the day.

San Francisco Fire Chief Joanna Hayes-White will help with the annual painting of a fire hydrant known as "The Little Giant."

It was credited with stopping the advance of the fire into the Mission District after the 1906 earthquake.