Threat of violent explosions in Hawaii forces authorities to close national park again CNNEruption could hurl rocks 'the size of cows' from summit crater, scientists warn Hawaii News NowThe Week in Pictures: May 3 - 10 NBCNews.comThe Implacable Power of Volcanic Lava WIREDAs Hawaii volcano erupts, let's remember that California has at least 19 The San Diego Union-TribuneFull coverage
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