Earthquake Information

May 23, 2013 (17:19:04 UTC)

Quake Location

Magnitude 7.4 Tonga

A magnitude 7.4 earthquake struck 255 km (158 miles) southwest of Tonga, according to the US Geological Survey, but there were no reports of damage. The earthquake hit at 5:19 am local time and was centered 282 km (175 miles) southwest of Tonga's capital Nuku'alofa at 171 km (106 miles) deep.

Teachable Moment

Teachable Moment Presentation

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Wave Propagation (mp4 1.36 MB / YouTube)

En Español

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USGS Resources

Earthquake Information

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