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What Are Teachable Moments?
May 23, 2013 (17:19:04 UTC)
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 Presentation
5 slide Powerpoint presentation (zipped ppt/animation 3.68 MB / pdf 662 kB)
Animations and Visualizations
Wave Propagation (mp4 1.36 MB / YouTube)
Presentación en Español (zipped ppt MB / pdf MB)
IRIS Data Management Center (DMC) Pages
View All Recent Earthquake Teachable Moments