Replace “an earthquake with a pronounwhat is a pronoun for an earthquake

"It"  is a pronoun for an earthquake. 

Pronouns are basically words used when referring to a noun. In this case, "earthquake" is a noun. We use the pronoun "it" when referring to an earthquake since earthquakes are gender less, and therefore the pronouns "he" or "she" would be inappropriate when referring to an earthquake. 

In my opinión this is the first person