Late last week, on Iceland’s Reykjanes Peninsula, a concerning sequence of earthquakes suddenly turned into a full-blown volcanic crisis. A burst of intense and frequent seismic shaking, accompanied by a convulsing crust, suggested that a huge volume of magma was rapidly burrowing its way toward Svartsengi, the site of a major geothermal power plant and, close by, the coastal town of Grindavík, home to 3,500 people.
The region now nervously sits atop a vast sheet of magma simmering just half a mile belowground. At some point, likely within the coming days, it will probably erupt somewhere along a 10-mile-long line stretching from northeast of
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