GENERAL SANTOS CITY, Philippines — At least eight earthquakes struck off the coast of the southern Philippines on Wednesday afternoon, which the Philippine Institute of Volcanology and Seismology are calling aftershocks of the deadly magnitude 7.8 earthquake that hit the same region on June 7. 

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A magnitude 6.3 earthquake was the strongest of Wednesday's quakes, according to USGS, with an epicenter about 45 miles south of the city of Glan on Mindanao, the country's second-largest island.

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Tsunami Warnings were not issued. The other aftershocks ranged between magnitudes 4.6 and 5.2, and no damage or injuries have been reported.

Meanwhile, another strong earthquake struck along the Pacific Ring of Fire, near the remote Kermadec Islands, northeast of New Zealand.

The Pacific Ring of Fire is a 25,000-mile belt of volcanoes and earthquake zones surrounding much of the Pacific Ocean, where 90% of the world's earthquakes occur.

The Kermadec Islands do not have a permanent population.

A series of earthquakes rattled California, Mexico and Japan along the Pacific Ring of Fire on Tuesday.