Marie, the French Fractrice, has "Booger Hollow, Arkansans" on her blog for this week's Postcard Friendship Friday, but I picked this one out ahead of time.
An over sized postcard published by the US Geological Survey, it shows the Caribbean and surrounding areas and plotted in tiny dots (even on the original) are the locations or epicenters of 94 years of earthquakes. Coloring of the land indicates height above sea level (green: low elevation; browns: getting higher), and different shades of blue indicate ocean depths. (Pale color: less than 100 meters, deeper blues for deeper depths). The average ocean floor in the Atlantic and Pacific oceans is over 3 miles deep!
There are a number of plate tectonic boundaries in the Caribbean and one does veer right through Haiti. A 7.0 magnitude quake is a major one and in such a poor country..... This area is going to be suffering for years to come. I worry about 6 months from now, when the hurricanes start arriving.
The USGS has prepared a poster on the 7.0 Haiti earthquake. You can print out a large copy if you have access to a large-format printer, or you can print a smaller size. the link is http://earthquake.usgs.gov/earthquakes/eqarchives/poster/2010/20100112.php
One person has asked where I find all these postcards. Well, let's just say that if you go to conferences where the state surveys have a booth and they have promotional postcards.... you can build a great collection.
I have two more state geology postcards, for later weeks. Take care!