QUITO, Ecuador — A powerful magnitude 6.7 aftershock early Wednesday rattled Ecuador near the Pacific coast area where a devastating earthquake hit a month ago damaging tourism hubs.  The latest quake knocked out power and scared still-traumatized residents as they slept, but only limited damage was reported.

The U.S. Geological Survey said Wednesday that the quake’s epicenter was 35 kilometres (21 miles) from the town of Muisne. It struck shortly before 3 a.m. local time and had a shallow depth of 32 kilometres below the earth’s surface.

President Rafael Correa said there was no tsunami alert and called on residents in Quito, where some residents poured into the streets, to return to their homes. The quake was strong enough to trigger a national disaster alert, but Correa deactivated the emergency response a few hours later when local authorities reported the situation was calm and only a few light injuries.

“These sort of aftershocks are normal but that doesn’t mean they’re not scary and can cause damage,” Correa said in a televised address, adding that aftershocks of this magnitude were normal for up to two months after a major quake like the one Ecuador experienced.

The magnitude 7.8 earthquake on April 16 was Ecuador’s worst natural disaster in decades, killing 661 and leaving more than 28,000 people homeless. It has been followed by hundreds of aftershocks, at least five of them of magnitude 6.0 or higher.

Ecuador was already struggling economically before the April disaster. Correa has hiked taxes to fund the recovery but says it will take years to rebuild the beach towns and tourist hubs levelled by the quake.

Jorge Zambrano, mayor of Manta, one of the areas hit hardest by last month’s big quake, said streets were calm.

“It was a big shake and all of us were scared but there are no major problems at the moment,” said Zambrano.