Loud boom heard in the East Bay

ALAMEDA, Calif. (KGO) -- Many people in Alameda and Oakland went straight to social media looking for answers after hearing a loud bang.

Some say the noise was so powerful, their houses shook.

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ABC7 News was in the process of launching SKY7 to investigate, when Oakland Fire Captain Sean Laffan told us the loud noise was believed to be a ship starting up near the Howard Terminal, just north of Jack London Square.