A moderate earthquake struck off the west coast of Indonesia's tsunami-ravaged Aceh province on Wednesday, jolting the capital and some coastal towns but causing no damage or injuries, an official said.

The 5.6-magnitude quake was centered about 20 miles northwest of the port

town of Meulaboh on Sumatra island, and 17 miles beneath the floor of the

Indian Ocean, said Budi Waluyo of the Meteorology and Geophysics Agency in

Jakarta.

The quake was felt from Meulaboh to the provincial capital Banda Aceh,

Waluyo said in an AP report

In December 2004, a 9.1-magnitude earthquake off the coast of Sumatra

triggered a tsunami killing more than 131,000 people in Aceh and leaving

tens of thousands more missing.

The Indonesian archipelago lies amid a volcanically active region in the

Pacific Ocean known as the Ring of Fire and frequently has seismic activity