LONDON -- A powerful, shallow underwater earthquake struck Friday near Tonga in the southern Pacific, prompting authorities to issue and then lift a tsunami advisory.
The U.S. Geological Survey said the magnitude 7.3 quake was centered 211 kilometers (132 miles) east-southeast of Neiafu, Tonga, at a depth of 24.8 kilometers (15 miles). It predicted strong shaking but said the probability of serious damage or casualties was small.
The U.S. Tsunami Warning System issued and later lifted a tsunami advisory, which is one step below a tsunami warning.
An undersea volcano erupted in Tonga in January, killing three people, blanketing its main island with a thick layer of volcanic ash and shooting millions of tons of water vapor high up into the atmosphere.