搜索结果: 1-1 共查到“地球内部物理学 magnetic field”相关记录1条 . 查询时间(0.155 秒)
3.2 Billion-Year-Old Surprise: Earth Had Strong Magnetic Field
magnetic field Earth and Environmental Sciences
2007/4/9
April 6, 2007,Geophysicists at the University of Rochester announce in today's issue of Nature that the Earth's magnetic field was nearly as strong 3.2 billion years ago as it is today.