One week after a major quake shook southern Alaska and prompted a tsunami alert, another strong quake has struck the region.

Like the 7.8-magnitude quake that hit on July 21, this one also took place offshore south of the Alaska Peninsula.

This one struck at 12:03 a.m. Anchorage time (1:03 a.m. Vancouver time) today (July 28).

The U.S. Geological Survey measured it as a 6.1-magnitude quake.

Much deeper than the July 21 temblor, the epicentre of this was positioned at a depth of 41 kilometres (25 miles) and located 67 kilometres (41 miles) southwest of Sand Point, Alaska, and 968 kilometres (600 miles) southwest of Anchorage.

The U.S. Tsunami Warning Centre stated that a tsunami is not expected from this quake.

Emergency Info B.C. stated that there isn’t a tsunami threat to B.C.

According to the Alaska Earthquake Centre, this is an aftershock from the July 21 quake.

Numerous small quakes have been occurring in the area, including a 5.5-magnitude quake at 11:34 a.m. Anchorage time (12:34 p.m. Vancouver time) on July 27, at a depth of 44 kilometres (27 miles).

The July 21 earthquake triggered a tsunami warning to be issued, as residents were evacuated along the southern Alaskan coastline. However, it was later called off.

The next day, a 5.1-magnitude offshore quake struck west of Vancouver Island, according to Earthquakes Canada (the U.S. Geological Survey measured it as 5.4-magnitude).