how plate techtonics are affected by changing magnetic fields of the Earth

The plate tectonic theory says that the plates (oceanic and continental both) are moved due to the convectional currents in the interior of the earth. The interior of the earth includes the mantle and the core. The mantle of the earth is fluid in nature, but the core is hard. The core of the earth is made of NIFE (Nickel and Ferrous (Iron)). The mantle is made of nickel and magnesium. So both the mantle and core are made of magnetic materials.

The alignment of the magnetic materials decides the earth’s magnetic field. The reason for this is the magnetic materials are charged up in the process and they align themselves to form magnetic poles. Now, due to changing magnetic poles, the alignment of magnetic materials are also changing, thus changing the convectional currents inside the earth surface. So this change in convectional currents will change the orientation of the crustal plates of the earth surface. The change in orientation of the crustal plates will induce stress and strain. When the stress and strain will be released in the form of energy, vibrations will occur. The vibrations will cause the shaking of the earth surface (crust). This vibration of the earth is nothing but earthquake.

So we decipher that the changing magnetic poles may be one of the causes for the upcoming earthquakes occurring recently throughout the globe. One good example is that, the recent earthquake in the northern part of India in 2011. It was an unusual occurrence as the region was not so much prone to earthquakes. But the changing magnetic poles might trigger the occurrence of the earthquake.

Thus, we have a firm belief that the changing earth’s magnetic poles are one of the causes of the earthquake.