FERRELVIEW, Mo. — New details about the reported Platte County earthquake in mid-March are coming to light.

On Thursday, the United States Geological Survey told FOX4 the rumbling on March 15 was caused by a mine collapse at the Stamper Mine in Ferrelview, a village that sits inside Kansas City limits.

Original USGS reports said the earthquake registered 3.5 magnitude. Another federal agency says there are other safety concerns at that mine, which sits on Interurban Road.

FOX4 first learned of this mine collapse from an anonymous email. A geophysicist with the United States Geological Survey confirmed that on Thursday afternoon.

Yaareb. Atlaweel, who works for USGS in Denver, Colorado, said further investigation into the incident showed a depth of zero rather than the six-mile depth that was originally reported.

Trucks carrying rock and gravel roll in and out of the Stamper Mine all day. FOX4 has reached out to Martin Marietta, the company that operates the mine, several times since Monday, but a North Carolina based spokesperson has yet to reply.Rick Nelson, who lives 1.5 miles away in nearby Platte City, said he often complains to local managers at the mine managers about the dust that rises from the plant.

Nelson said he hasn’t head anything from Martin Marietta leaders since the collapse, but the integrity of the ground near his home is a concern.

“We’ve had issues with our houses settling in different directions and stuff like that. If they’re doing something like that, I’m sure that’s going to cause more of that,” Nelson said.

FOX4 also emailed with the Mine Safety and Health Administration on Wednesday, a federal agency that’s part of the U.S. Department of Labor.

Paloma Renteria, a spokesperson for MSHA in Washington D.C., told FOX4 that agency is aware of a recent mining collapse at Stamper Mine, and there are other safety reports concerning conditions at the mine.

Renteria wouldn’t elaborate on those reports, saying there is an ongoing investigation involving the mine.