Your answer would be Tectonic.
Tectonic plates move in various directions, and move slowly. Due to the movement of tectonic plates the earth cracks, and shakes which is called an earch quake. Tectonic plates move constently everyday, and you can't feel it because it's slow. Wehn tectonic plates move quickly, the earth starts to shake. The most common places that have tectonic plates have a higher chance of having an earthquake, even a tusnami.
Answer:
7.0 - 1.4 = 6.4
Explanation:
the pollution is increasing 1850 to1960 in a constant speed but from the year 1970 it start increasing very fastly
14.6 million square miles is the area surface of the moon
the moon is 80 times less than earth