Colors are chosen to quickly convey the severity:
Green: Magnitude < 3.0 - Small earthquakes, typically not felt.
Yellow: Magnitude 3.0 - 4.9 - Moderate, might be felt by people nearby.
Red: Magnitude >= 5.0 - Strong, can cause damage and are widely felt.
Last 30 days of Global LIVE Real-Data Earthquakes. Be patient. Takes time. Thanks USGS
Use your mouse to zoom it in and out. And rotate as you like.
The size of each line on the globe represents the magnitude of the earthquake:
The visualization shows: