Hawaii Lava Flow Ramps Up As New Magma Mixes With Old

CHICAGO (CBS)-- Lava oozing out of cracks for two weeks in rural Hawaii neighborhoods took on new characteristics as fresher magma mixed with decades-old magma, sending a flow toward the ocean Saturday.

Since a first fissure opened in a community on May 3, lava was mostly spattering up and collecting at the edges of the cracks in the ground. Two neighborhoods with nearly 2,000 people were forced to evacuate as lava claimed 40 structures.

On Friday afternoon, the lava changed dramatically with one fissure ramping up and sending a flow across a road, destroying four more homes and isolating residents, some of whom had to be air-lifted to safety.

The change is attributed to new magma mixing with 1955-era magma in the ground, creating hotter and more fluid flows, scientists said.

"There's much more stuff coming out of the ground and it's going to produce flows that move further away," said Wendy Stovall, a U.S. Geological Survey (USGS) volcanologist.

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