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Related to Earth's magnetic reversal:Magnetic polarity reversal geomagnetic reversal n. A change in the earth's magnetic field resulting in the switch in position of the earth's magnetic north and south poles. Also calledmagnetic reversal. ...
If the underlying assumptions are realized in the Earth, then it would seem that if the dipole axis approaches the rotational axis to within about 0.5, then a reversal of polarity of the Earth's field is likely to occur. 展开 年份: 1971 ...
The Earth's magnetic field is known to have reversed its polarity at least nine times during the past 4 脳 106 yr5,6 and at frequent intervals before that except during the Permian7. Briefly, the ideas of Uffen1,2 and Simpson3 are that during the process of a ...
reversal 英[rɪˈvɜːsl] 美[rɪˈvɜːrsl] n.倒转;逆转;反转;颠倒;彻底转变;倒置;倒退;退步;转胜为败;(位置或功能的)转换,交换 Every 200,000 to 300,000 years, the Earth's magnetic field reverses. 每过20万到30万年,地球的磁场就会发生逆转。
必应词典为您提供Magnetic-reversal的释义,un. 反方向磁化;地磁反向;磁性反转; 网络释义: 磁性逆转;逆磁化;磁场逆转;
The field’ s strength has decreased by 10 or 15 per cent so far and this has increased the debate over whether it signals a reversal of the planet’ s lines of magnetic force. During a reversal, the main field weakens, almost vanishes, and reappears with opposite polarity (极). The ...
Also called geomagnetic reversal When magma rises to the Earth's surface at a mid-ocean ridge, it flows out onto both sides of the ridge, gradually cooled by the seawater. Like tiny compass needles, the magnetic minerals in the hot magma are at first free to align themselves with the Eart...
网络释义 1. 磁场逆转 2、磁场逆转(Magnetic Field Reversal)地球磁场沿着旋转轴有一个近似的偶极子形状,像一个条形磁铁,有南北磁极,这是正 … blog.sina.com.cn|基于83个网页 2. 磁场翻转 ...(Magnetic Pole Movement);磁场翻转(Magnetic Field Reversal);地磁抽搐(Geomagnetic Jerks);磁层变化 (Magnetospher…...
Recent studies have found that the Earth'smagnetic field has weakened about 5% per decade.At its current rate, the next reversal could happen within the next century.Some people worry about the effects of a magnetic field reversal.They think there is a possibility that it could cause many ...