Bengkulu - A tectonic earthquake measuring 5.0 on the Richter scale jolted East Nusa Tenggara town of Waingapu at 5:38 local time on Wednesday morning, Meteorology and Geophysics Agency (BMG) said.

It said the epicenter of the quake was located at 10.39 degrees southern latitude and 120.23 degrees eastern longitude at a depth of 13 kilometers under the sea level, or some 81 kilometers northwest of Waingapu.

But so far there was no immediate report of casualty and material damage after the tremor.

In the past three consecutive days earthquake occurred elsewhere across Indonesia.

At 10.08 local time on Tuesday morning the eastern Indonesian islands of Ambon and Seram were hit by a 5.8 magnitude earthquake or one day after a temblor measuring 5.2 on the Richter scale rocked the area early Monday.

Meanwhile, Ambon Meteorology and Geophysics Agency spokesman Benny Sipolo said the epicenter of Tuesday's quake was located at 2.31 degrees southern latitude and 127.95 degrees eastern longitude at a depth of 35 kilometers under the sea level, or some 148 kilometers northwest of Ambon.

The epicenter of Tuesday morning's quake was not far from Monday's, namely at 2.91 degrees southern latitude and 128.19 degrees eastern longitude, around 80 km northeast of Ambon, 263 km southeast of Sanana, Maluku Province, at a depth of 10 km below sea level.

Earlier on Saturday, September 13, 2008, the eastern Indonesian islands of Maluku were also jolted by an earthquake measuring 6.1 on the Richter scale.

BMG said the epicenter of Saturday's quake was located at a depth of 72 kilometers under the sea level, about 97 kilometers northeast of Ambon, 370 kilometers northwest of Fakfak in West Papua, 371 kilometers southeast of Labuha in North Maluku, 380 kilometers southeast of Sanana in North Maluku, and 392 kilometers northwest of Sorong in West Papua.

On Thursday, September 11, Halmahera island in North Maluku was also hit by a more powerful 7.6 magnitude earthquake.

Soon after the earthquake, BMG issued a tsunami warning but it was lifted later after receiving report from several areas, saying that there was no indication of tsunami.

Indonesia, the world's largest archipelago, sits on the Pacific "Ring of Fire," the edge of a tectonic plate prone to seismic upheaval.