We applied this RF analysis to Haiti, a country that is located on the complex, active boundary between the North American and Caribbean tectonic plates. Utilizing data from the temporary Trans-Haiti Network and the permanent Haitian and Canadian seismic networks, we analyzed how earthquake waves change as they travel through Haiti’s subsurface. Using a special technique called harmonic decomposition, we were also able to identify tilted or anisotropic structures.

Our findings revealed a complex geological structure; we identified a distinct feature at ~10km deep, and found significant layered crustal anisotropy. We also observed intracrustal structures that vary laterally and a difficult-to-detect Moho. By creating pseudo-images, we saw features that were continuous across the north-to-south profile of the island, solidifying our understanding of the crustal and upper mantle of Haiti.