The centre of an earthquake is called the 'epicenter' (U.S. spelling) or 'epicentre' (British/Canadian spelling).
The epicentre of yesterday's quake was north of Ottawa. Some bridges and bricks fell down at the epicentre.
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog
