A 4.0 earthquake was felt in Texas and Oklahoma in the USA this weekend. Although the earthquake itself seems to have done very little, if any, damage, it is very worrisome that this area, and possibly other areas as well, seem to be having a lot of earthquakes lately and possibly because of wastewater injection from oil and natural gas production, etc.
https://www.mysanantonio.com/news/texas ... 323017.php