Surprising hot springs

Scientists find shallow source of water for volcano’s hot springs

By Sid Perkins, 15:58 PM January 8, 2013

A lake sits in the crater of the Philippine’s Taal volcano. Scientists recently discovered that hot springs flowing into the lake come from a shallow source — the lake itself. Credit: MatthieuG/Wikimedia Commons

For years, scientists had assumed that geysers and other types of hot springs spewed water that came from deep inside Earth. Now researchers working at a Philippine volcano have stumbled across an exception. Hot springs flowing into a lake in the volcano’s crater come from a shallow source — the lake itself. The new finding suggests there may be plenty of similar spots worldwide.

Temperatures deep below Earth’s surface are, on average, much warmer than at ground level. That’s true for a n...

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