1. Gutenberg, B. andRichter, F. -Seismicity of the earth -Princeton University Press, 1954.
2. International Seismological Summary - University Observatory, Oxford.
3. Bulletins du Bureau Central International de Séismologie - Strasbourg.
4. Bulletins de l’ U. S. Coast and Geodetic Survey - Washington D. C.
5. Archives du Service des Mines - Port-Vila (Nouvelles-Hébrides).