Commander Basin

Its southern boundary is the Aleutian arc (see figure) and occupies the western part of the Bering Sea.

In the southwestern portion of the basin near the Ulakahn Fault, linear magnetic anomalies associated with the Early Miocene have been identified.

The magnetic anomalies support a sequential opening of the Commander Basin resulting from stresses on the interface between the Eurasian and Pacific plates.

The structures of the Bering Sea floor at the Commander Basin were created 17 to 21 Million years before the present.

To the south, the Commander Basin connects to the North Pacific through the 4.4 km wide, 4,420 meter deep Kamchatka Strait and the 2.0 km wide, 2,000 meter deep Near Strait.