A magnitude 7.1 earthquake shook Southern California around 8:20 pm on Friday night — just one day after a 6.4 magnitude quake struck the Ridgecrest area on July 4, AP reports.
Why it matters: Following a quiet stretch in California's seismic history, these are the largest reported earthquakes to affect the state in nearly 20 years. Scientists say the fault causing the quakes seems to be growing, per the LA Times.
