No tsunami threat to Marianas from 6.4 Philippines quake

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The U.S. Geological Survey initially recorded a powerful 6.4 earthquake Tuesday morning which struck the southern Philippine island of Mindanao.

The Pacific Tsunami Warning Center advises that there is NO tsunami threat to Guam or the Marianas.

The temblor was recorded at 9:04 local time (11:04 a.m. ChST). It was centered about 8.6 miles east of Bual in the central part of Mindanao at a depth of 15.3 miles.

It was initially measured as being a 6.8 magnitude earthquake but was later downgraded to 6.6, and then down to 6.4.