Thread by @MSNBC

BREAKING: A 6.9 magnitude earthquake has occurred in the Ridgecrest, CA area, USGS reports.

BREAKING: A 7.1 magnitude earthquake shakes Southern California, one day after most powerful quake in 20 years nbcnews.to/30ggac0

BREAKING: Magnitude 7.1 earthquake rattles Southern California, one day after most powerful earthquake in two decades.

WATCH: A 7.1 magnitude earthquake shakes Southern California, only one day after the most powerful quake hit the region in 20 years. on.msnbc.com/2Js1K1S

WATCH: Southern California residents describe scene following 7.1 magnitude earthquake hit the region.

"I've been in a lot of quakes in a lot of parts of the world. This one got my attention."

@LesterHoltNBC describes scene after 7.1 magnitude earthquake hits Southern California. nbcnews.to/30ggac0

@LesterHoltNBC Lucy Jones, seismologist at California Institute of Technology and a former science adviser at the Geological Survey, tweeted that Thursday's earthquake was a “foreshock,” and that Friday’s 7.1-magnitude earthquake was on same fault as the earlier quake nbcnews.to/30ggac0

@LesterHoltNBC .@mollymhunter live via phone from tonight's epicenter of Ridgecrest, California, now on @MSNBC.

Dr. Lucy Jones, seismologist at California Institute of Technology and a former science adviser at the Geological Survey, says latest 7.1 magnitude earthquake will not trigger another earthquake outside Ridgecrest, CA, region.

In the moments after a 7.1 magnitude earthquake shook Southern California, a resident outside a Carl's Jr. describes the shaking he experienced. on.msnbc.com/2XrSTSH

.@BenPu_nbc live via phone from Las Vegas now on @MSNBC, where shaking from tonight's California quake was felt.

.@mollymhunter is in Ridgecrest, California, near the epicenter; says live on @MSNBC that she was shaken awake by the quake tonight, and power is out in the area around her.

WATCH: Lucy Jones, seismologist at California Institute of Technology, says the depth of 7.1 magnitude earthquake is similar to what was seen before in the region.

"I was also raised in California and I've never felt anything like that."

Molly Hunter gives update from Ridgecrest, California, near epicenter of 7.1 magnitude earthquake.

WATCH: Seismologist Lucy Jones breaks down the potential for more earthquakes in Southern California on.msnbc.com/2XNn9vA

What is the difference between the two earthquakes that hit Southern California this week?

@NBCNews' @joefryer reports.

@NBCNews @joefryer "I lost my house today, I don't know if I can even save it... it's on the ground."

@NBCNews' @mollymhunter interviews a man who says he lost his home in Ridgecrest, California, but showed up to volunteer at the hospital: "I was needed out here." on.msnbc.com/2XuOizg