"On the west slope of the Tonga Trench."

Despite their hair-raising ordeal, almost all of them had voted to return to station and continue their deep-ocean survey of the Tonga Trench.

The wreck lies nineteen thousand seven hundred and sixty feet deep on a smooth slope of the Tonga Trench.

The Tonga Trench is linear, fast converging, and seismically active.

There is a belt of deep earthquakes in the west of the Tonga Trench.

Like everyone else, he read and saw the news about the strange artifact that Poseidon Projects had brought up from the Tonga Trench.

The inchoate feeling, the hesitation, when it passed over the Tonga Trench.

Haʻapai consists of 51 islands directly beside the Tonga Trench.

The Tonga Trench is a convergent plate boundary.

The Tonga Trench marks the continuation of subduction beyond this point.