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一、地球磁场和电场1地球磁场地球磁场是随着地球的演化而形成的。地球就像一块巨大的磁石,它的磁场分布充满了整个地球空间(图1),可以从地球内部一直延伸至行星际空间数十个地球半径处,地表磁场在南北磁极点磁场最强,可达到约7万nT。长期的地球磁场的观测和研究表明,地球磁场是随时间和空间而变化的。地磁场及其变化是地球深部和近地空间物理过程的重要信息来源之一,如地震、火山喷发、局部地磁异常、地磁脉动和磁暴
First, the Earth’s magnetic field and electric field 1 Earth’s magnetic field The Earth’s magnetic field is formed with the evolution of the Earth. The Earth is like a giant magnet whose magnetic field is full of the Earth’s space (Figure 1). It stretches from the interior to the dozens of interplanetary radii. The surface magnetic field has the strongest magnetic field at the north and south poles. Reached about 70,000 nT. Long-term observations and studies of the Earth’s magnetic field show that the Earth’s magnetic field varies with time and space. Geomagnetic field and its changes are one of the important sources of information on the physical processes of the Earth’s deep and near-Earth, such as earthquakes, volcanic eruptions, local geomagnetic anomalies, geomagnetic pulsations and magnetic storms