Two loud blasts — which turned out to be manhole explosions — rattled lower Manhattan on Thursday, sending residents into a panic.

“I just started running,” said Susan Goddard, who works at the Godiva store near 53 Nassau Street, where both of the deafening blasts occurred around 4:20 and 4:50 p.m.

“When I hear a boom, what do you think you goes on? My mind automatically goes to a terrorist attack,” she said, noting the recent Austin bombings.

“With everything going on in the world, it just makes you more aware,” added Kevin Landau, a 46-year-old lawyer from Manhattan who works downtown and recently took a trip to the Texas capital.

“I did think it was a bomb, just the volume and intensity of it,” he said.

Despite the frenzy, police officials described the first blast as a “minor manhole explosion” — and said no one was seriously hurt. One person was being evaluated at the scene, but their condition was unclear.

The second blast happened on the same block and left one person with minor injuries, cops said.

Dozens of firefighters were on the scene — near Nassau and Liberty streets — for several hours investigating the incidents Thursday. Both explosions went off under cars.

“Announcement in our building (120 Bway): a manhole cover on Nassau Street blew, hence the loud boom in the Financial District a few minutes ago,” tweeted Amy Spitalnick, the spokeswoman for New York Attorney General Eric Schneiderman, following the first blast.

“Super scary,” wrote Evan Sporer. “Loud bang, building shook.”

Many residents were standing near the scene — trying to figure out what happened after the 4:20 p.m. explosion — when the second blast occurred. Most took off running.

“I’m not dying today, bro,” said one passerby.

Witnesses told The Post that the person with minor injuries was getting into his car when the manhole exploded underneath it.

“He was shaken up,” said construction worker Jonathan Nunez, 24.

“He was standing there, and [first responders] asked if he wanted medical attention and he said no. He looked disoriented,” explained Nunez. “And then he walked into the ambulance.”

Officials said the man was transported to Bellevue.