Story highlights The earthquake was at a depth of 130 miles, the USGS says

No tsunami alerts were issued

A 6.9-magnitude earthquake struck deep under the ocean floor northwest of Okinawa, Japan, near noon Tuesday, according to the U.S. Geological Survey.

The temblor, which hit at 11:59 a.m. (9:59 p.m. Monday ET) was measured at a depth of 209.5 kilometers (130.2 miles), according to the USGS.

The Pacific Tsunami Warning Center did not issue any alerts, saying there was no tsunami generated by the quake.

The epicenter was 218 kilometers (136 miles) northwest of Naha, Okinawa, and 497 kilometers (309 miles) from Taipei, Taiwan, the USGS said.

A clerk at a hotel in Naha told CNN people in the hotel felt a "small rumble" but there was no damage.