BEIJING, Feb. 25 (Xinhua) -- The Chinese Seismological Network detected a strong earthquake measuring 7.6 on the Richter scale off southern Sumatra, Indonesia, at 2.4 degrees south and 100 degrees east at 4:36 p.m. on Monday (Beijing Time).

    The epicenter was located at about 100 km south the coast, 180 km from the city of Padang.

    There were no immediate reports of casualties or damages.

    The National Earthquake Information Center, based in the United States, issued a tsunami warning after the quake.

    But Qu Guosheng, the chief engineer of the China Center for Earthquake Disaster Emergency, told Xinhua the earthquake was unlikely to cause tsunami.

    Qu said the epicenter was about 35 km below the seabed. "Based on experience, an earthquake at such a depth would not be likely to cause a tsunami."

    Qu's agency is a special institution of the China Earthquake Administration that offers quick suggestions on emergency response to major disasters worldwide.

    Indonesia lifted its tsunami warning after the powerful quake.

    "We have lifted the tsunami warning after more than one hour," said Dwi Hartanto, an official of the country's geophysics and meteorology agency.