Seeming correlation between time of day and earthquakes
As noted by Barry Carter, you could take a look at https://www.emsc-csem.org/Earthquake/Map/zoom.php?key=75&amp;typ=NAM#5 to see the earthquakes around San Francisco, with a table below giving the time and date of the earthquake(s). The USGS can create a similar data-set (try there). I used that to extract the earthquakes of magnitude 2.5+ in the SF area over the last 4 years:



Or the same data with a Kernel Density Estimator in a polar plot (the circle corresponds to 24 hours):



Based on these plots, I think that there is no specific trend suggesting that earthquakes are triggered at specific times.

Earthquakes tend to have their 'core' at depths of a few km's usually, which means that they are not very aware of day-night cycles. Apart from perhaps very minor influence of gravitational differences due to sun/moon locations (which vary over the course of a month), the earthquakes truly follow their own 'random schedule' with respect to our life-cycle!