San Francisco does not have buildings over 100 years old because the city was destroyed by an earthquake 100 years ago. Your brick house also would have been destroyed by that earthquake.
Plenty of homes survived the 1906 earthquake in San Francisco, the destruction was not absolute.
The whole west coast is full of old brick houses; which were either knocked down, or have been retrofitted and reinforced. Because brick structures are inherently unstable in earthquakes.