The Earth's rotation

The Earth's rotation somehow slowed down! Therefore in 2018 there will be many earthquakes!
So scientists say.
A significant increase in the number of destructive earthquakes around the world might happen in 2018 due to the slow speed of rotation of the Earth, said us scientists at the annual meeting of the Geological society of America, according to Forbes.
The greatest danger facing the densely populated tropical areas, where the slow rotation of the planet can cause intense seismic activity.
The relationship between the rotation of the Earth and seismic activity, the researchers found Roger Bilham and Rebecca Bendik.
In their study, Bilham and Bendik considered earthquakes of magnitude 7 and above that have occurred since 1900.
The researchers found five periods where there was significant surge of large earthquakes:
"In these periods during the year was from 25 to 30 strong earthquakes. The rest of the time the average figure was about 15 major earthquakes in a year."
Scientists say that in the periodic slowing rotation of the Earth followed by periods of increase in the number of intense earthquakes.
Despite the fact that the rotation of the Earth slows down only for a millisecond and it is possible to measure only a very accurate atomic clock, it has a significant influence on the seismic survey. Discovered relationship is particularly important, because the rotation of the Earth once again starts to slow down about four years ago.
According to Roger Bilham:
"The conclusion is clear. Next year we should see a significant increase in the number of serious earthquakes.
This year it was easy for us. So far we had about six destructive earthquakes. But their number could rise to 20 per year starting from 2018".
Why is slowing the Earth's rotation?
It is estimated that in an average century, lengthened the earth's day by 1.8 milliseconds. Moreover, the speed of rotation of the Earth decreases more rapidly.
According to scientists, this happens not only under the action of tidal forces and the moon, but due to global warming. Melting polar ice redistributes mass on the planet.
In addition, the perpetrators named earthquake and the electromagnetic interaction between the core and the mantle.
Physics remind: if the Earth were perfectly rigid body, it would be possible to speak about the speed of its rotation, but it's not. Separate parts of the Earth move relative to each other, but for us, visible only by the speed of the cortex — and it is relatively thin (about 10 km).
Its movement can vary depending on the movement of the earth filling. The total angular momentum is preserved, but the crust can increase or decrease your speed — this is normal.