而当它们之间只有一个较小的气压梯度时，风就能够经常从北极区向南吹。

When there's a smaller gradient, air is often able to flow down from the Arctic.

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这些带电粒子形成的粒子云（又叫太阳风）在14和15日掠过地球磁场，造就了观察北极光的美妙时刻。

The southern part of the particle cloud, or solar wind, grazed Earth's magnetic field on the 14th and 15th, resulting in a particularly good night for aurorae.

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由沿着地球磁场加速运行的太阳风粒子所引起的北极光（auroraborealis），将能够在纬度与现今的纽约市相当的位置观察到。

The aurora borealis, caused by solar wind particles accelerating along Earth’s magnetic field, would have been visible as far south as present-day New York City.

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