Strong quake jolts western part of nation

? A powerful earthquake struck western Indonesia today, geological agencies said, but there were no immediate reports of damage or injuries.

The temblor had a preliminary magnitude of 6.2 and was centered 65 miles from Sibolga, a city on Sumatra island, the U.S. Geological Survey.

The Indonesian geological agency did not issue a tsunami warning.

Indonesia, the world’s largest archipelago, is prone to seismic upheavals due to its location on the so-called Pacific “Ring of Fire,” an arc of volcanos and fault lines encircling the Pacific Basin.