I heard the initial quake was a few miles off the ocean near Eureka. Many years ago don’t know about recent but the environmentalist there and people in general didn’t want oil drilling in their oceans. I also heard that they weren’t interested in training and hiring locals in that area so they were denied. I never saw any oil blots like some places in southern Calif Anyways it was said the initial Quake that called for a tsunami warning was a few miles off shore. I’m not sure about that accuracy but was also no oil wells in that area back when.
Texas on the other hand at one time did think fracking contributed to a quake but not sure when that happened.
Being in more than one I noticed the ones in Calif Anyways, that are on solid ground do shake back and forth and San Fernando was significant. Where the walls moved above you towards the ceiling then back the other way. Someone I know said he thought he had a flat tire on the FWY and pulled over He said he saw the building shaking and leaning back and forth Whole lotta shaking. We’re on the coast and from the ocean it was more of a rolling movement like you were on a boat caused by waves and much quieter in comparison. I heard one one poster who was there it was a rolling type movement. Just pieces I picked up but wasn’t so concerned because this is the time of year they start happening. I guess the bad part is like hurricanes. If you live somewhere where they’re frequent your not as attentive than someone who is not used to it. The reason is in a bad quake it’s likely you could get a jolt type warning and then the big one comes like in San Fernando. In a bad one the best chance of survival is getting out of the building immediately before the roofs start coming down or it collapses like what happened to the hospitals especially if made out of bricks where the grout from friction breaks down pretty fast like at the Veterans and hospital or cement carports or bridges. Even today I do not like getting stuck in traffic on or under a bridge and will give a distance between me and the car in front so if things start to shake I won’t sit there I’d drive around them. Today with crime in some areas it’s a good idea anyways.
Nevada I don’t know if there was any fracking in or near the area I just hope they don’t leave sink holes like miners did. Some grandma just died because of that looking for her cat and fell through a sink hole looking for her cat.