1. Earthquakes follow a similar pattern as the same day the years before, based on the earthquake regions as mentioned above.
2. The likelihood that an earthquake happens in an earthquake region has to do with the position of the sun. It is most likely for an earthquake to happen when the longitude of sun is close to the longitude of the earthquake region (noon and the darkest hour). Or the sun
Earthquakes follow a similar pattern based on LONGITUDE/Magnetic lines of the earthquakes. Draw a circle around earth through the poles. All location and +- few degrees extra on that circle are considered the same location/region. For example places around 180 degrees and 0 degree LONGITUDE would be considered the same location/region.