Dhaka, July 20 -- A tsunami warning has been triggered after a series of powerful earthquakes occurred off the coast of Russia. The strongest tremor registered a magnitude of 7.5, following two earlier quakes measured at 5.0 and 6.7, according to the United States Geological Survey (USGS). Some reports noted the final quake at 7.4 on the Richter scale.

As a result, a tsunami watch has been placed for Hawaii, situated in the northeastern Pacific. Initial alerts for Guam and American Samoa have since been withdrawn.

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The USGS stated that dangerous tsunami waves could be generated within a 300-kilometre radius of the epicentre, located in the Pacific Ocean near the Russian city o...