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  Volcano outside Mexico City still rumbling, spitting ash

  The Popocatepetl volcano near Mexico City is still rumbling. The snow-capped volcano has been erupting periodically since 1994 and eruptions began strengthening about two weeks ago.

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  Alaska volcano shoots lava, ash plume thinning

  Alaska's remote Pavlof Volcano was shooting lava hundreds of feet into the air, but its ash plume was thinning Saturday and no longer making it dangerous for airplanes to fly nearby.

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  U.S. budget cuts hamper monitoring of volcanic activity in Alaska

  Scientists monitoring Alaska's volcanoes have shut down stations that track eruptions in real time and put off repairing seismic equipment due to U.S. budget cuts -- moves that could delay getting vital information to pilots and emergency planners.

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  Mexico's Popocatepetl volcano steams, rumbles as eruption looms

  Seismic activity has increased at the Popocatepetl volcano near Mexico City, leading authorities to alert towns in two central states and the capital.

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  Volcano spews room-sized rocks, killing 5 unsuspecting climbers

  One of the Philippines' most active volcanoes rumbled to life Tuesday, spewing room-sized rocks toward nearly 30 surprised climbers, killing five and injuring others that had to be fetched with rescue helicopters and rope.

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  Are volcanoes taking the heat off global warming?

  Volcanic eruptions may counter the effects of global warming and help keep the planet cool, according to a new study that explores why the Earth hasn't warmed as much as predicted over the past decade.

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  Chile issues red alert over increased security at volcano on Argentina border

  Chile is issuing a red alert for a volcano on the border with Argentina that has become increasingly active.

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  Indonesia's Mount Lokon volcano erupts, spews smoke and ash

  A volatile volcano in northern Indonesia erupted Sunday, spewing smoke and ash that caused muddy rain to fall in nearby villages, an official said.

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  Volcanic rock mass floating off the coast of New Zealand

  A mass of small volcanic rocks nearly the size of Belgium has been discovered floating off the coast of New Zealand.

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  Canadian researchers say small volcanic eruptions could cool climate

  An international team led by University of Saskatchewan researchers says small volcanic eruptions could cool the climate.