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Watching this newborn island erode could tell us a lot about Mars

Its volcanic tuff is tougher than expected and may withstand ocean waves for years

By
5:48pm, December 11, 2017
Hunga Tonga-Hunga Ha’apai

BABY PICS  Scientists are keeping an eye on the rates of erosion of volcanic ash on Earth’s newest island, called Hunga Tonga-Hunga Ha’apai.

NEW ORLEANS — Earth’s youngest bit of land is getting a new lease on life. When an erupting volcano birthed an island in the Pacific Ocean in late 2014, scientists thought waves would erode the island away within just a few months. Instead, new data suggest it could stick around for up to 30 years, researchers reported December 11 at a news conference at the American Geophysical Union’s fall meeting. Studying the life and death of this island may provide clues to Mars’ wetter past.

The new island, informally dubbed Hunga Tonga‒Hunga Ha’apai, is part of the Tonga island chain. Since January 2015, NASA satellites have tracked the island’s growth and erosion month-to-month. Scientists are using those data to estimate its life span, said James Garvin, chief scientist of NASA’s Goddard Space Flight Center

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