I liked how simple it looked, and noticed that it refreshed periodically. Poking at it in the browser dev tools revealed that it was polling a https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_day.geojson.
I thought it would also be cool if the app could notify me when a new earthquake past a certain magnitude threshold happened. I called the app Seismic and released v1.0 in less than a week, which is a new record for me.
Another positive side effect is that now I have a pretty solid taskbar app template that I can use for future projects.