Marker height off the globe represents depth into the Earth.
When an earthquake strikes, you will hear a rumble, ding, and a bell toll. The bell will toll the number of times = to the earthquake which occurs. (example : M4.0 will ring 4 times). The most recent earthquake has a green placemark / flag on it. Blue flag / placemark = the last earthquake which was looked up ______ Global Earthquake Monitoring Links:
https://sincedutch.wordpress.com/2011...