As of 31 December 2018, there had been 150 tornado event days with 1169 total tornado reports for 2018. On average, each tornado event day had about tornadoes reported.

7.798

Explanation:

It is understood that as at 31 December 2018, there had been 150 tornado event days with 1169 total tornado reports for 2018.

Then the average will be a calculated as:

1169/150= 7.79. This is regarded as the average amount of tornado experienced in the days it took place.

We can then infer and say that on average, each tornado event day had about 7.79 tornadoes reported.

not completely sure but i think it’s many moons, smaller in size and a ring system.