Replies

They predicted the quake?

Just Wow!

24 posted on 06/13/2008 5:10:33 PM PDT by fanfan ("We don't start fights my friends, but we finish them, and never leave until our work is done."PMSH)

They predicted the quake?

From what I understand they didn't predict it. They detected it in the north and sent the warning south. From http://nemo.sciencecourseware.org/VirtualEarthquake/VQuakeExecute.html: The speed of an earthquake wave is not constant but varies with many factors. Speed changes mostly with depth and rock type. P waves travel between 6 and 13 km/sec. S waves are slower and travel between 3.5 and 7.5 km/sec.

So 120 seconds warning for an earthquake 720 to 1560 km away. Maybe a shorter distance/longer time if the S waves are the stronger ones.

40 posted on 06/13/2008 5:25:11 PM PDT by KarlInOhio (the Clinton dream of being a two impeachment family goes right down the drain. - Letterman)