24-hour Earthquake Monitoring
"I can feel the earth move under my feet."
– Carole King
Not all earthquakes are preceptible to people, though. Which is why it is a good thing that the United States Geological Survey (USGS) has been established to monitor geological hazards at a worldwide scale... like earthquakes.
The USGS Earthquake Hazards Programme provides real-time data about earthquakes. Today's Earthquakes maps the earthquake data collected by the USGS for the past 24 hours (updated every five minutes), and provides their magnitudes, significance, and depths.
The map has three tile layers corresponding to different ways to view terrain and geography information (dark ,satellite, and street). Earthquake information is overlaid as circles such that whatever tile layer is chosen, earthquake locations are included in the rendering.
The legend is set from 1 to >8 as this is the range of earthquake magnitudes. The legend and the circles are colour-coded based on the magnitude of each earthquake. Also, the size of the circles are based on the earthquakes they represent.
Today's Earthquakes opens with introductory text explaining the contents of the map. It also features an image of a road cracked during an earthquake. The image was obtained from a Loop T&T news article; however, no attribution information is included in the article.
Today's Earthquakes, like the USGS data, is updated every five minutes. To see the earthquakes from the past 24 hours, just click "Start". To see the nuts and bolts that were used to build the map, head over to the project's wiki page.