The earthquake occurred 468 km ( 302 mi ) south - southwest of Guam . There are no immediate reports of injuries or deaths . The USGS gave the quake a preliminary magnitude of 7.0 before downgrading it to 6.8 . The Pacific Tsunami Warning Center did not issue a tsunami warning .
The earthquake occurred 468 km ( 302 mi ) south - southwest of Guam . There are no immediate reports of injuries or deaths . The Pacific Tsunami Warning Center did not issue a tsunami warning .