LIMA, April 2 (Reuters) - Peru issued a tsunami alert along its southern coast after a 7.8-magnitude earthquake struck northern Chile, the Peruvian Navy said via Twitter on Wednesday.
The U.S. Geological Survey upgraded the earthquake - the strongest of several aftershocks since a massive quake rocked the region on Tuesday - to 7.8 after initially reporting it had a magnitude of 7.4.
There were no initial reports of damages in Peru. (Reporting by Mitra Taj; Editing by Lisa Shumaker)
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