According to scientists, big earthquakes can (slightly) change the gravity under the affected area. This is happening because powerful earthquakes alter the mass distribution of the Earth. Japan’s earthquake, with 9 magnitude, is one of them since it is the 5th strongest ever recorded. Don’t worry, the change from that one is about 2 millionth of a gal when the average earth gravity is about 980 galileos. Over the last few years we had many strong earthquakes and some of them are in the top 10 of all times. What this means? Have we entered to the “Earthquake Era”?