The earthquakes reached up to 3.2 magnitude and shook the state from Los Angeles to the northern city of Chico.
The biggest quake hit near the town of Idyllwild, in the San Jacinto mountains east of Los Angeles, at 8:24 p.m. on Christmas Eve. USGS said that it was 9.6 miles deep and was felt as far away as Rancho Cucamonga city and Redondo Beach.
An substantial 6.3 magnitude quake struck a spot off the coast of British Columbia on Christmas eve, around 182 kilometers (113 miles) west of Port Hardy, a town of about 4,100 people.
It had a depth of 6.2 miles and people reported feeling it in more than 300 miles away in Vancouver, USGS said.
These earthquakes are considered large enough to cause moderate damage to buildings and infrastructure in the state.
Earlier this year in July, California was hit by its most powerful earthquake in nearly 20 years when a huge 7.1 magnitude quake struck.
A warning is then delivered to mobile phones using the Wireless Emergency Alert system, which delivers critical warnings and information to the public on their wireless devices, or via the MyShake app, which was developed by the University of Berkeley Seismology Lab.
The system was launched on the 30th anniversary of the devastating Loma Prieta earthquake that killed 63 people in the San Francisco Bay Area.
However, the amount of notice people receive will depend on how far away they are from the epicenter of the earthquake.