Continental drift is the cause and I think it’s fascinating. I believe the same thing is happening in California along the San Andreas fault, but not as far along as the Rift Valley.
Maybe there’s a way to make some money with this. Let’s get a handful of crack geologists to write a paper proposing that human activity is accelerating continental drift. It shouldn’t be difficult to find some teenage girl to shriek that it’s the end of the world. Then get some nuts to throw soup on the Mona Lisa in protest. All the while we rake in huge donations from Zuckerberg, Gates, Bezos and crew.