An Earthquake is a natural disaster that occurs during the game. It may kill hundreds, or even thousands, of people in a select country for the player. It can destroy 1 or 2 cure research facilities in said country, and often puts the country in the state "General Disruption." In very rare cases, two disasters in one country within a few years of each other can put the country in "Widespread Disorder" without the plague even being introduced to the country.
The following is the content of its associated popup:
Billions of dollars of damage caused in <country>. WHO expects it will take years to repair the damage caused to thousands of businesses, homes and research facilities.