When an earthquake is coming, how can you get even a little warning?

When an earthquake is coming, how can you get even a little warning?

building a seismic monitoring site

Washington Post

https://www.washingtonpost.com/national/health-science/when-an-earthquake-is-coming-how-can-you-get-even-a-little-warning/2015/10/30/df12c640-63c1-11e5-9757-e49273f05f65_story.html