Originally Posted by matthughesfan21
I'm not sure, aftershocks are normal but I don't think this was an aftershock...The big quake was so large that I heard it shifted the earth's faults slightly, so I don't know if this is a result of that...I'm not seismologist, so just assumptions on my part haha
my son's science lab teacher told them these are swarms, having multiple quakes back to back.
plate movement in one of 3 ways can cause quakes. a plate can move up down or side ways. so if the plate moved down maybe the pressure from the earth is off and it continues to release pressure causing the repeated quakes. i think this is the 2nd or 3rd being called an aftershock that really is another quake. or say the plate moved up and is trying to resettle and the change from the original quake is causing the earth to reject the increase back to the original position. clearly the continual quakes means the pressure on those plates is not what is should be.