Unusual: Four Earthquakes off the West Coast of United States (San Andrea's)

Four Earthquakes have hit off the West Coast of United States. A very active and dangerous part of the Tectonic plates is the San Andreas which runs along the West Coast of America. These earthquakes are Unusual on the adjoining Tectonic plate. 

Magnitude 4.8 - 264km West of Ferndale, California

Magnitude 4.3 - Off the coast of Northern California

Magnitude 3.3 - 252km West of Ferndale, California

Magnitude 3.2 - 274km West of Ferndale, California

Magnitude 3.1 - Off the coast of Northern California