<span style="color: #222222;">An earthquake measuring 6.1 on the Richter scale rattled Nusa Tenggara province in central Indonesia today but no tsunami warning was issued.</span><br />'' <br />'' <span style="color: #222222;">The country's meteorology and geophysics agency said the quake struck with the epicentre at 148 km northeast Alor of the province and the depth at 573 km under the sea bed. </span><br />''