(graphic courtesy of USGS)
When there’s a major earthquake like the one in Japan we hear a number like it’s a seven or even a nine. That tells us how big the quake was but not much about the damage it caused or the lives lost. Now, scientists have come up with a more sophisticated tool. David Wald of the National Earthquake Information Center in Golden tells Ryan Warner about the PAGER -- Prompt Assessment of Global Earthquakes for Response -- system.
