ERHC has a 100 percent working interest in Blocks 4 and 11 of the São Tomé and Príncipe EEZ free of signature bonuses. EEZ Block 4 totals 5,808 square km, situated directly east of the island of Príncipe. The northeastern area near EEZ Block 4 contains a large graben structure, which is bound by the Kribi Fracture Zone. All images are from the National Petroleum Agency of the Democratic Republic of São Tomé and Principe. The entire presentation can be viewed at http://stp-eez.com/DownLoads/Presentations/STP%20-%20Houston%2015April%20vr.pdf.