never
Usually none, can sometimes happen, i.e. 0-2 per year
Earthquakes are not a seasonal phenomenon and so the time of year has no effect on the occurrence of earthquakes. As such, earthquakes can happen at any time of the year as they occur independent of weather and climate.
No, earthquakes can occur at any time of the year without following a specific seasonal pattern. Earthquakes are caused by the movement of tectonic plates beneath the Earth's surface, which can happen at any time.
Nobody knows how many earthquakes can happen in a year because you cannot predict earthquakes. :)
Earthquakes can happen at any time, day or night. There is no such thing as earthquake season.
Earthquakes are not seasonal! As such they could happen at any time of the year.
Tornadoes usually happen in the months; April, May, and June.
Usually winter time
On average, there are about 500,000 detectable earthquakes in the world each year, with about 100,000 of those able to be felt. In the United States specifically, there are usually around 20,000 to 30,000 earthquakes each year, most of them small.
1,000,001
This year in 2011 probably has the most earthquakes ever.
more than a thousand each year