Three relatively strong earthquakes were recorded Sunday night in the Pacific Ocean off Vancouver Island.

The U.S. Geological Survey reported a 6.6 magnitude quake about 260 kilometres west of Tofino, followed by a 6.8 tremor and then a third measuring 6.5.

Survey geophysicist Zachary Reeves said all three quakes occurred in the same general area over the course of about an hour, and at a shallow depth of approximately 10 kilometres.

Reeves, based in Golden, Colorado, described the quakes as "pretty big," however, no tsunami warning was issued and there were no reports of any damage.