With rescue crews still searching for survivors, and construction workers racing to brace a large building that was left leaning by a magnitude-6.4 earthquake Tuesday morning, Taiwan’s Hualien County was struck by a powerful aftershock today.

The first temblor struck at approximately 9:50 a.m. EST Tuesday, killing at least seven people, while nearly 70 more remained missing in the popular tourist destination. The U.S. Geological Survey reports more than a dozen aftershocks have occurred since then, ranging from 4.1 to 5.4 in magnitude.

But at approximately 10:21 a.m. EST Wednesday, a magnitude-5.7 quake struck the same area just off the island’s northeastern coastline. The new temblor originated at a depth of approximately 6.8 miles.

There have been no reports of additional damage or injuries, so far.