Mount St. Helens growing for past three years - NBC Right Now/KNDO/KNDU Tri-Cities, Yakima, WA |

Mount St. Helens growing for past three years

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Photo - USGS Photo - USGS

LONGVIEW, Wash. (AP) - Monday will mark three years since the latest activity began at Mount St. Helens.

Lava has been steadily pushing up through the volcano, growing a lava dome in the crater that was left after the big 1980 blast.

Scientists say the lava flow has slowed.

Mount St. Helens Monument scientist Peter Frenzen says at first the lava dome was growing at the rate of 3 dump truck loads of molten rock a second. Now it's down to about two filing cabinets worth of lava per second.

The lava dome has filled eleven percent of the crater. Frenzen says it would take 200 years to rebuild the mountain to its size before the eruption 27 years ago.

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