The US Geological Survey reported that a 6.0-magnitude earthquake struck off the coast of California.
The epicenter of the earthquake was about 6 miles deep and was west-southwest of Monterey, according to the United States Geological Survey.
The agency said about 70 people from as far away as San Diego and San Francisco felt the shake.
The Bay Area office of the National Weather Service said that the earthquake was too small to cause a wave.
The energy released at the source of the earthquake is measured by the magnitude. The old scale has been replaced by a new one.
According to Michigan Tech, earthquakes between 2.5 and 5.4 magnitude are not very damaging. People rarely feel earthquakes below 2.5 magnitude.
A 3.1-magnitude earthquake woke up the LA area.
Thousands of people are rattled by a 5.1 magnitude earthquake in Northern California.
The second earthquake of the day is 3.0 magnitude.