If it blows like Krakatoa it would swamp NYC and Philly, and Baltimore.
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Boston, Fla ... any place along the Atlantic coast below 2,000 ft above sea level, depending on wave height.
Its a basalt volcano ; they are not explosive - like the Hawaiian sort. The danger comes from the already slipping land on the east side of the island. The linear crack is over 10 feet deep in places, maybe more now. That mass sliding into the water will create a wave like Lituya Bay.
NASA Version : https://earthobservatory.nasa.gov/images/147557/lituya-bays-apocalyptic-wave
That’s an interesting read...thanks for posting.