Earthquake

Earthquakes are a natural disaster cause by the shifting of Earth's plates.

Sim City Series
Earthquakes were first introduced in the Sims City games as a disaster with the potential to start fires and destroy a city.

The Sims Series
The Sims series has lacked earthquakes, however, an interview with Grant Rodiek has confirmed that earthquakes are set to appear in the next Sims 3 expansion, Ambitions. It is currently unknown how they will work, but they are likely to start fires for the new firefighter sims to deal with.