While an early-morning earthquake took place in a frequently seismically active region west of Vancouver Island, several quakes have been rumbling in California. All of them have been of shallow depth.

The quake off Vancouver Island’s northern tip hit at 4:40 a.m. today (August 19) at a shallow depth of four kilometres (two miles).

The epicentre was located 335 kilometres (208 miles) northwest of Tofino, 343 kilometres (213 miles) west of Campbell River, and 472 kilometres (293 miles) northwest of Vancouver.

While the U.S. Geological Survey measured it as a 4.2-magnitude seismic event, Earthquakes Canada reported it as a 4.0-magnitude quake.

Earthquakes Canada stated that the event was not felt, and that there were no reports of damage and none are expected.

Meanwhile, several quakes have been taking place in California.

In Northern California, a swarm has been occurring in an area near the coast north of San Francisco.

The largest quake, at 5:55 p.m. on August 18, registered as 4.0-magnitude, according to the U.S. Geological Survey, with an epicentre 11 kilometres (seven miles) southeast of Willits, California, and 24 kilometres (15 miles) north of Ukiah, California, and a depth of seven kilometres (four miles).

Others following shortly thereafter have ranged from 2.5- to 3.9-magnitude.

In Central California, a 4.4-magnitude quake occurred at 10:32 a.m. today.

At a shallow depth of one kilometre (0.6 miles), the epicentre was located 25 kilometres (15 miles) northeast of Darwin, California, and 96 kilometres (60 miles) north of Ridgecrest, California.

It was followed 18 minutes later by a 2.8-magnitude quake.

Earlier this week, Southern California, including San Diego, was shaken by a cluster of quakes that took place on August 17 in Baja California, Mexico, near the U.S-Mexico border.