This lava field just north of the Mýrdalsjökull ice cap serves as one of many monitoring sites to track ground deformation that could serve as a signal of an impending eruption of Katla.

这片位于米达尔斯冰盖北部的熔岩原是用来追踪地面形变的监测点之一，这里地面的形变可以被视为卡特拉火山喷发的前兆。

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NASA spokesman Steve Cole said that was possible because the last track for the satellite included Canada, starting north of Seattle and then in a large arc north then south.

NASA发言人史蒂夫.科尔说，因为加拿大留下了卫星的最后轨迹，所以存在这样一种可能，就是从西雅图北部开始，然后以大弧形向北再向南。

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He told us that magnetic north is moving at a speed of 50 kilometers - about 30 miles - every year. He said that scientists nowadays use satellites to track the changes.

他告诉记者，磁北极每年以50千米(约30英里)的速度移动，如今科学家使用人造卫星追踪磁极移动的轨迹。

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Nor has anyone yet broached the question of who might pay for upgrading the North's track to take the mountain of exports that the South hopes to send via North Korea, China and the trans-Siberian railway on to Europe.

ECONOMIST: Waiting for Korea��s peace train

The photograph of the track in North Yorkshire which was released by the RMT earlier this month condemned the quality of the track.

BBC: Cracks in East Coast Main Line investigated

Mr Haket wants additional track capacity just north of Chelmsford and further extension of the third track from Stratford.

BBC: East Anglia rail: Call for help to improve network speeds