Los Angeles residents woke up to the "shock" of their lives when a rolling earthquake, measuring 4.4 on the Richter scale, hit the northern part of the area and reverberated throughout the city!

According to The Weather Channel, the epicenter originated in a small town about 6 miles outside of Westwood, California. No immediate damage was reported, but about an hour after the initial shock hit -- around 6:30 a.m. PST -- an aftershock measuring about 2.7 on the Richter scale peeled through Los Angeles.

Naturally, according to Fox News, residents in Los Angeles can expect some setbacks: all Metro rail lines are reporting delays, and engineers are going throughout the city to make sure that all structures have received no damage.

In terms of Los Angeles earthquakes, this is far from the largest or the most deadly earthquake: two decades ago, a 6.7 magnitude earthquake originating in the Northridge district killed several dozen people, and caused $25 billion in damages (more than a trillion dollars today, when adjusted for inflation). But Dr. Lucy Jones, a seismologist, said this quake was scary for Los Angelinos, not because of the magnitude, but because it's the largest one that the city has experienced in a long time.

"It's not that large by California terms. It's the size of earthquake we have across the state once every couple of months," Jones said. "But we haven't had one like this in LA for quite a while."

People on Twitter are already calling this earthquake the "Shamrock Shake." Check out some of the funny comments below: