Indeed it is. It currently has a strength at the Earth‘s surface of 0.6 Gauss. But long term observations show that it is DECREASING at a rate of about 0.07 percent PER YEAR.
Indeed it is. It currently has a strength at the Earth‘s surface of 0.6 Gauss. But long term observations show that it is DECREASING at a rate of about 0.07 percent PER YEAR.