How Strong is the Earths Magnetic Field?
The Earth’s magnetic field varies depending on your location on the Earth’s surface. In regions near the magnetic poles, such as Siberia, Canada, and Antarctica, it can exceed 60 microteslas (0.6 gauss), whereas in regions farther away, such as South America and South Africa, is around 30 microteslas (0.3 gauss). Near the poles, the field strength diminishes with the inverse square of the distance, whereas at greater distances, such as in outer space, it diminishes with the cube of the distance. Where the prime meridian intersects with the equator, the field strength is about 31 microteslas. The region where the Earth’s magnetic field lines extend into space is called the magnetosphere, and influences the trajectories of the charged solar wind at distances exceeding 10 Earth radii. Solar wind, ejected from the Sun in all directions at great speeds, collides with the magnetosphere in a region called the bow shock. Like gravity, magnetism has an infinite range, although it diminishes so
Where is it strongest? weakest? Where does the Earth’s internal field originate? How do we know? How do we know that the whole Earth isn’t permanently magnetized? What hypothesis is the most generally accepted explanation for the Earth’s internal magnetic field? How is the external field produced? What changes occur in the Earth’s magnetic field? What are magnetic storms? What are diurnal changes and how are they produced? What are secular changes? What is a possible explanation for secular changes? What is westward drift? How might it be produced? What evidence do we have for magnetic reversals? How often do magnetic reversals occur? How long does a reversal take? When was the most recent reversal? What happens to the strength of the Earth’s magnetic field during a magnetic reversal? What might be the effects on life of a magnetic reversal? What effects beside faunal extinctions correlate with magnetic reversals? Why are magnetic prospecting methods more complicated than gravity prosp
Is it strong enough to magnetize the lava that flows over the already magnetized lava bed? I have heard several discussions about the earth’s magnetic field. Most of the time, science refers to it as a weak magnetic field. But I also noticed that it is referred to as strong when a subject just as this comes up. So does the answers, science gives, just change to suit the need to answer a question and always be right? Then we have the issue of lava forming under water. The outer part of lava would cool much quicker and take on a magnetic field long before the inner part is cool enough to do so. So will the out side magnetized shell effect the final polarization of the slower cooling inner part? You bet. And will the inner core effect the final result of the polarization of the whole lave rock? The core polarization determines the final polarization. So if the core is opposite of the outer shell, the shell will have to change over time to be like the core’s poles. So that the lava rock wi
