The Northridge earthquake struck at 4:30 a.m. on January 17, 1994.
The shaking only lasted for 10 to 20 seconds, but it was by followed by a series of aftershocks — including one 11 hours later.
Fifty-seven people died as a result of the quake and another 8,700 were injured.
Thousands of single-family homes, apartments, and mobile homes were either destroyed or severely damaged.
next slide will load in 15 secondsSkip AdSkip AdIn the wake of the earthquake, the California National Guard set up shelters for displaced residents.
“Many of the hardest-hit areas became known as ‘ghost towns’ ... because building owners could not afford the cost to rebuild,” California Earthquake Authority CEO Glenn Pomeroy said in a statement.
The shaking incited fires, floods, and landslides. It also downed water and gas lines.
Most notably, the earthquake damaged multiple freeways, including the Santa Monica Freeway, one of the busiest freeways in the world.
Then-president Bill Clinton declared LA County a national disaster area, which opened up federal funding for relief efforts.
next slide will load in 15 secondsSkip AdSkip AdThe Los Angeles Unified School District also shut down schools for a week, and city officials called for a temporary dusk-to-dawn curfew.
Five days after the quake, around 10,000 households in the northwest San Fernando Valley still lacked running water.
Around 200 residents contracted a disease called "Valley fever" after landslides kicked up debris that contained spores of fungus. Three people died as a result.
The quake also damaged numerous hospitals, forcing patients to be relocated.
California later passed a law requiring emergency rooms to be located in earthquake-resistant buildings.
Many were afraid to return home after the quake, with some choosing to leave California entirely.
next slide will load in 15 secondsSkip AdSkip AdThough LA has rolled out a warning system for the next "Big One," its housing shortage and population size could exacerbate future damage.