A strong earthquake hit western Mexico Wednesday, shaking buildings as far away as the capital and sending people rushing out of offices onto the streets, though there were no reports of major damage.

Mexico City Mayor Marcelo Ebrard said on his Twitter account there were no initial signs of serious damage and that key services in the capital, including subways and the airport, were operating normally, Reuters reported.

There was a nasty crunching sound in my bathroom and everything moved, said Adela Arceo, who was looking after two young children in the central Roma neighborhood of Mexico City.

There were no initial reports of casualties.

The U.S. Geological Survey said the magnitude 6.5 quake struck at 5:55: p.m. local time, 42 miles northwest of Lazaro Cardenas in the state of Michoacan, at a depth of 12.4 miles. The epicenter was 238 miles west-southwest of Mexico City.

Emergency services in Michoacan and in the neighboring state of Guerrero, which has been hit by a series of recent quakes, reported no major problems on Wednesday. No damage has been reported immediately in Michoacan, Jose Fernando Barron, head of the state government's press department, told Bloomberg in a phone interview.

You could feel it, but there's no major damage. There are no reports, no emergency calls, said Agustin Lule, a spokesman for fire services in Uruapan, a town in Michoacan near the epicenter of the quake.

Reuters reporters in coastal areas of Guerrero and neighboring Oaxaca state said there was no damage.

The Honolulu-based Pacific Tsunami Warning Center said it had not issued a tsunami warning, but staff oceanographer David Walsh noted the quake was close to water, big enough and potentially deep enough to cause one.

It was the third big earthquake to hit Mexico in less than a month. A 7.4 magnitude quake struck on March 20, damaging hundreds of buildings in the southwest. That was followed by dozens of aftershocks.

Earlier on Wednesday, an 8.7 magnitude earthquake struck off Indonesia, raising fears of a huge tsunami like the one that battered the Indian Ocean rim in 2004, but authorities said there were no reports suggesting a major threat.