Yew wanna put some 1 sd ranges on those bars of yers, son? They ain’t worth diddly-squat without error bars.
And obviously the seismographs are all off getting their morning coffee! 
Um, Vlad/Igor, I hope you realized that my prior post was totally in jest, in all aspects of it, including use of the word “significant.” 
Good stats. But I was only comparing the “big ones”. How about if you just chart those 7.0+? 
At the risk of a whoosh, I’ll point out that Omphaloskeptic’s bar graphs are representing exact integral numbers of events. There are no error bars (apart from the accuracy of the # symbol).
If you click on the time link on the page, it will tell you the local time/date of the eipcenter.
3 of the seven listed for 4/19 were during daytime.
Well, I don’t think anyone in China buys the OP’s concept, now. 
Yes, I’m thoroughly disabused of that. :(, indeed.
Because the earth spins, the surface (at the equator) moves at 2000 miles per hour faster around the sun during the nighttime hours. Because of relativity, that means that time is moving slightly slower for that part of the Earth during nighttime hours.
In order to keep up, the night-side of Earth has to spin slightly faster than the day-side. For that to happen, the momentum of the day-side has to push the night-side to move it along. That ought to cause a slight compression of the Earth on the evening side. Likewise, a slight expansion of the Earth on it’s morning side.
I did some calculations just now, and I’m not an expert, but I think the total expansion/compression together would be on the order of .38 millimeters at the most pronounced location. Not much. It is incredibly slight because 2000 mph is a low speed when we are talking about relativity.
BUT, I’m not an expert in any of these fields, maybe a daily .38 millimeter change is nothing, or maybe it is enough to cause something, or maybe I’m really bad at this and I didn’t even get that quantity nearly correct.
Notice that this effect would not exist at the poles, and increases as you move toward the equator. That’s something you could factor into histograms.
It occurs to me that night time earthquakes are likely to be more devastating than daytime. People are in bed, rather than out and about or in properly constructed office buildings.
This could mean that night time quakes get more publicity than those during the working day.
The histograms showed five years ago that there’s no reason to start looking for a cause of night time earth quakes.
I expect the compression waves from an earthquake causes disturbances larger than those of relativity.
I hope this is a whoosh.
I think the whoosh is the sound made by the Earth as it spins more rapidly during the nighttime hours and slices through the atmosphere.
It occurs to me that the water suffers “waterquakes” daily , we call them the tides.
These are triggered by variations in gravity.
Now the earthquake is a like a sudden failure of the rock.
Another sudden failure often seen is the tree. Trees are known to more often fall over in strong wind.
You see why ? because the strong wind creates a slightly larger force on the weak part of the tree then has been there during the weeks, months, of gentle winds…
and if the rain has weakened the soil, then the wind more easily causes the root failure fall over…
Earthquakes are more likely to occur when the variation in gravity is at the greatest RATE… but since that occurs every day, its not as clearly obvious as in trees in storms.
But given the evidence from the tides , and the way “tides” are used to explain changes in orbit , and “locking” of rotation (eg moon is tide locked to earth, the far side of the moon is always the far side…)
Then its clear that tides must be a huge force on rock strata… which triggers earth quakes
I stopped at the one part of that post which is factually correct.
Given that the northern and southern hemispheres rotate in different directions, I’m surprised that earthquakes don’t happen constantly throughout the day and night, at least at the equator.
The 1994 Northridge Earthquake could have caused a much greater loss of life if it had happened during daylight hours. In the wee small hours of the morning, most of us Angelenos were safely in bed in our (hopefully earthquake-code-compliant homes, rather than on the freeways (some of which collapsed) like we would have been a few hours later.
And yes I am aware of that apartment building in Northridge that pancaked, but that was the exception rather than the rule.
During that earthquake, I personally got pelted with stuffed animals that were on the bookshelf above our bed - smart Angelenos don’t put anything heavy above their beds like books or glass knickknacks. 
In CA, big quakes tend to happen in the early morning hours.
Thermal expansion.
What is most likely the time of day/night that a zombie thread will reopen?
So, earthquakes dont happen anymore?:rolleyes: What is the point of your comment?
You could report the thread if you like, but IMHO there’s no reason to close it, it’s still relevant, etc.