A 7.7-magnitude earthquake struck the Mariana Islands in the Pacific Ocean on July 29, 2016.
The major quake was followed by a series of 4 smaller ones within an hour. No tsunami warning has been issued.
The quake occurred at a depth of 117 miles (212 km) some 19 miles south-southwest of the uninhabited island of Agrihan in the U.S. territory at 20:20 UTC.
No tsunami warning has been issued. But a barely noticeable wave of about two inches was recorded in Saipan, the largest of the islands.
The quake was felt in the neighboring territory of Guam with Twitter user @JRaemier telling it woke her up: