The U.S. Geological Survey initially reported 

The quake had a magnitude of 5.8 

Guam was rocked by a loud, prolonged 5.3 

Magnitude earthquake at 10:55 p.m. Monday.

located 30 miles north of Yigo at a depth of 70 miles.

Office of Civil Defense advised that there was no tsunami threat

The quake was widely felt.

There were no major reports of damage or injuries

The Digester Management Team on Spot

Usually, the after shocks are predicted in & around the area