After the SNAP 9A satellite accident in 1964, the dispersion of Pu was investigated as a function of latitude North and South. It was obvious that most of the fallout of ²³⁸Pu was on the southern hemisphere. However no data from Madagascar, where the accident happened, were reported. This paper describes the analysis of peat bog samples for Pu-isotopes by alpha spectrometry after radiochemical separation. To investigate especially the presence of ²³⁹Pu, selected samples were analyzed for ²³⁹Pu and ²⁴⁰Pu using mass spectrometric analyses, AMS.