PORT VILA, Vanuatu >> A strong earthquake has shaken the South Pacific island nation of Vanuatu without causing major damage.

The magnitude-6.1 quake struck Thursday afternoon. The Pacific Tsunami Warning Center did not issue a tsunami warning.

Godwin Ligo, a reporter at the Trading Post newspaper, said he felt his office building in the capital Port Vila shake and sway. He said he wasn’t aware of any major problems caused by the quake.

The U.S. Geological Survey reported the epicenter was 104 kilometers (64 miles) west of the capital at a relatively shallow depth of 15 kilometers (9 miles).

Vanuatu is on the “Ring of Fire” — an arc of earthquake and volcanic zones that stretches around the Pacific Rim. It’s where most of the world’s seismic activity occurs.