The auroral absorptions are related to the solar activity.
极光吸收与太阳的活动性密切相关。
The method has been applied to real auroral photometric data.
本文将这方法应用于实际极光亮度数据。
As to auroral hiss, there are upper and lower frequency cut-offs.
极光嘶声则有明显的上截止频率和下截止频率。
More normal auroral rings had been previously imaged around Saturn.
更多正常的土星环行极光被拍摄到。
So scientists have started looking for the cause of the auroral variations.
因此，科学家们已经开始寻找极光变化的原因。
This high result was interpreted to reflect previous auroral activity.
这一高结果可以用以前的极光活动来解释。
The darkness waned and a faint auroral glow began to appear in the east.
黑暗即将过去，一道微弱的曙光开始出现在东方。
The US Navy has also been carrying on High Power Auroral Stimulation research in Alaska.
美国海军也在阿拉斯加进行“高能北极光模拟”研究。
It is possible that the auroral oval shifts southerly and hence produces this effect in winter.
这可能是由于冬季极光卵向南偏移造成的。
Macquarie Island and Davis Station is located at the centre and the edge of auroral oval respectively.
麦阔里岛和戴维斯站分别位于极光带中心和极光带极向边缘区内。
Power law probability distributions of multiscale auroral dynamics from ground - based TV observations.
根据陆基TV观测多尺度极光动力学的幂律概率分布。
With a parallel upward electric field, it accelerates the auroral electrons and forms the discrete aurora.
它携带一个方向向上的平行电场，加速极光电子形成分立极光。
Moreover, at higher latitudes, as over the Davis Station, the auroral absorption increases and strengthens in winter.
另外，在较高磁纬地区的戴维斯站，冬季时极光吸收增多增强。
These results tend to agree with the observations associated with traveling convection vortices and midday sub-auroral patches.
上述结果在趋势上与观测到的输运对流涡旋和亚极光块的运动特征一致。
In this paper we use a correlation analysis technique of moving random pattern to calculate the shift velocity of auroral image.
用随机变形图案分析法计算极光全天空图象的移动速度。
Well above 100 kilometers, at the highest altitudes infused by the auroral glow, the red color comes from the excitation of oxygen atoms.
极光的最高高度远在100公里之上，红色极光是氧原子受激所发出的光芒。
The polar ionosphere is strongly influenced by convection electric fields, auroral particle precipitation, and field-aligned electric currents etc.
极区电离层强烈地受到极区对流电场、极光粒子沉降和场向电流等的影响。
In the auroral region we have precipitation of energetic particles, currents in the upper atmosphere and ionosphere, and fluctuating magnetic fields.
极光发生的地区沉淀着高能粒子，高层大气流和电离层，和上下浮动的磁场。
Blues and purples are created by lighter gases such as hydrogen and helium, while low-level nitrogen can add red fringes to the bottoms of green auroral curtains.
蓝色和紫色是来自较轻的气体比如氢和氦，而更低点的氮气能在绿色极光的底部添上红色的边缘。
The particles are heated and accelerated in the plasma sheet, and then injected into the near earth space, and produce the ring current and auroral substorm.
等离子体片中的粒子被加热和加速后，注入近地空间，产生环电流和极区亚暴。
It is thought that Electrophonic sounds may be induced in events of bolide, very bright auroral display, nearby strong lightning, earthquake and nuclear explosion.
据报道，大的流星火球、非常明亮的北极光、附近的强闪电、地震以及核爆炸等，都可能产生电声响。
With the increasing level of solar activities , it will likely trigger dazzling auroral displays at mid - latitudes 40 or above degrees north south from the equator.
由于太阳活动日趋频繁，在中纬度地区南北纬40度或以上地区也有可能出现绚丽多彩的极光现象。
But freak solar activity yesterday saw the stunning auroral display stretch much further than usual, as it was spotted by stunned stargazers across half of northern America.
但是昨天反常的太阳活动造福了北美人民：超级绚丽的北极光此次的延伸范围广得多，使得半个美国的天文爱好者大饱眼福，亲眼见证了北极光。
But freak solar activity yesterday saw the stunning auroral display stretch much further than usual, as it was spotted by stunned stargazers across half of northern America.
但是昨天反常的太阳活动造福了北美人民：超级绚丽的北极光此次的延伸范围广得多，使得半个美国的天文爱好者大饱眼福，亲眼见证了北极光。
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