Friday, January 10, 2014
Rare M5.1 earthquake hits Florida
This is extremely interesting. You can see that the earthquake is 'normal'. That means it is caused by extension, or pulling apart. This type of earthquake gives out very little PGV for magnitude. All our North American earthquakes (east) are thrust or strike-slip, due to high horizontal stresses.
By a cursory look at the map, Cuba takes on the look of a classical island arc. Yet, now, all the action passes it by, along that monstrous fault to the south. Somehow that entire arc is being pulled along. We don't expect major activity here, and Florida is fairly safe, just watch out for sinkholes!