JAKARTA, Dec. 5 (Xinhua) -- A powerful earthquake of 6.4 magnitude struck off East Nusa Tenggara of central Indonesia earlier Monday, but was not potential for tsunami, the Meteorology and Geophysics agency said here.

The quake jolted at 08 : 13 a.m. Jakarta time (0113 GMT) with epicenter at 120 km northeast Flores Timur of the province and the depth at 524 km under sea bed, an official of the agency said.

"We did not issue a warning for tsunami for this quake," the official told Xinhua by phone.

So far, there is no report that the quake was strongly felt in other areas, he added.

Indonesia is prone to quake for its position on the quake hit-zone called "the Pacific Ring of Fire."