(Sam) In late April, I had the opportunity to go to Haiti for one week with my advisor. We went as part of a team from several universities (sponsored by the National Science Foundation) to conduct research post-earthquake. My advisor actually went a week or two after the earthquake, but the team got additional funds to answer questions they had from the first time.
The second team was composed entirely of earthquake/geotechnical engineers with the exception of a geologist. One part of the team ran all around Port-au-Prince trying to create a map of the geology in the region. The USGS had created a map from incomplete data, but our team made a lot of changes and had a lot to add. It turns out that most of the surface soils are a lot stiffer than anyone thought, something that has a big effect on how the earthquake affects the buildings.
Another part of the team went to lots of sites and performed SASW tests all over the place. SASW stands for spectral analysis of surface waves. Basically, to perform SASW, you stretch microphones out in a line for about 100 or so feet (maybe longer, if you can get it). Then you hit the ground in different spots with a sledge hammer. With all sorts of mathematics and computers, you can use the data collected to create a profile of the soil according to the speed of the waves in the ground. The faster the waves move, the stiffer the ground. Basically, this is one more way to do what geotechs do: figure out what it is like underground. Incidentally, this team was led by a young geotech prof. at the University of Arkansas. He is a returned missionary from our church and originally from Helper, Utah. It was nice that I wasn't the only one not having a cold beer in the evenings.
The final team was my team, and it was composed of two professors (one was my advisor), and two grad students. We wanted to get information about liquefaction that occurred during the earthquake. Liquefaction occurs when loose, wet sands are shaken so hard that they go into a denser formation. (If you have ever tapped the measuring cup full of sugar or flour, you have probably seen it settle; it is basically the same.) Since the sand is wet, the water in the sand tries to get out of the way of the sand grains. But the densification occurs quickly and the water can't get out quickly enough. Instead, the water is compressed and the pressure of the water builds. If the pressure is enough to push the sand grains apart, liquefaction has occurred. What it means is that the sand loses its strength. If it is a hill of sand, it might slump, leaving big cracks behind. If it is a flat surface, like a field, you might only notice little sand volcanoes forming with with sandy water coming out (search for "niigata liqefaction" on youtube).
Anyway, with coordinates from Google Earth, we went to sites that had experienced liquefaction. We would pound a cone into the ground and measure the number of blows with the hammer to go a certain distance. This would tell us the density of the soil. We also used a hand auger to drill holes and take samples. The samples will be analysed by me (probably) back at the lab, and we will run our own tests using the samples, trying to recreate the liquefaction.

In the picture above, we are running tests at one site of liquefaction. I am crouching, counting the number of hammer drops, and my friend in the red shirt is doing the hard work lifting and dropping the hammer (the disc on the bar). We took turns, so don't think less of me.
In the black is our body guard- his regular job is with the national police. (Haiti doesn't really have a military; this national police force is the closest thing.) He also doubled as our interpreter and guide, which was probably even more important than the heat he was packing.
About the site: This was at a man-made jetty at a cement company. The soil liquefied because whoever made the jetty didn't compact it well enough. The cement company had the best security I saw anywhere (probably better than the UN), and since the company had a private port and was own by the Colombians, we were almost certain it is a port of entry for much of the country's narcotics.
This picture is also at the port of the cement company. I am acting as a human scale for the crack that can be seen under the conveyor.

Here is a group shot of our entire team, including our guards.
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This is an example of lateral spreading. A lot of the sites we visited were at the banks of rivers. At these locations, the weakening of the soils allows huge slabs of earth to move or slump (spread) into the rivers. As a result, you find huge cracks that run parallel to the river. You should note the banana trees around here.
(Many of the photos courtesy of Sam's advisor.)