Earthquake!!

Right now, there was an earthquake!! Only a very little one, though. The couch I am sitting on was shaking for maybe 5 seconds. Nothing more. Tia, who was standing, did not even notice it. But TJ did. He said that such a minor earthquake happens roughly twice per year.
The last very severe earthquake was in 1989 when even buildings fell down. That's why the buildings on campus are now supported by steel constructions.