A 7.1-magnitude earthquake struck just over 150 kilometers ( 93 miles ) northwest off the coast of Ternate , Indonesia , on Saturday , the U.S. Geological Survey reported . The quake struck at 10:31 a.m. local time at a depth of 35 kilometers ( 21.7 miles ) , according to the USGS , which initially called it a 7.3-magnitude quake . It was centered 156 kilometers east-northeast of Bitung , Indonesia , and 164 kilometers west of Tobelo in the same South Asian nation . The National Weather Service 's Pacific Tsunami Warning Center noted that the quake did not produce any destructive tsunami waves , though minor sea level fluctuations in some coastal areas were possible .
The USGS downgrades the quake 's strength to a 7.1-magnitude . The tremor strikes over 150 kilometers off the coast of Ternate , Indonesia . It struck at a depth of 35 kilometers , the USGS says . The quake did n't produce a tsunami , though minor sea level fluctuations are possible .