A strong earthquake has once again struck Haiti, shaking buildings and causing panic, eight days after a 7.0 magnitude quake left much of the nation in ruins.

The U.S. Geological survey said latest quake had a magnitude of 6.1 and was centered 59 kilometers from the devastated capital Port-au-Prince. There were no immediate reports of damage or injuries from Wednesday’s quake, which comes as an international aid effort is underway to help those affected by last week’s powerful earthquake.