Science: No End Seems to Be in Sight

Until a cap is formed, Mount St. Helens may continue rumbling

When Mount St. Helens finally blew its top after almost two months of rumbling and sputtering, the show was spectacular enough that it hardly required an encore for a century or so. But last week the seemingly inexhaustible volcano gave another lively performance. A second major eruption shook the mountain over the Memorial Day weekend, and steam and ash belched forth in fitful bursts throughout the week. More ominously, seismologists detected tremors originating from deep within the volcano's molten rock core, another...

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