. Laboratory, IPG Paris) for the accessibility and the quality of their data. The portable seismic stations were provided by the Institut National des Sciences de l'Univers (INSU) Réseau Large Bande Mobile (RLBM) managed by We are extremely thankful to Météo France and to the Aviation Civile for having made possible the installation of seismic stations on their sites and for the useful and efficient help provided by their personnel but also by the municipalities of the Polynesian Islands, J. J. Lévèque and J. Burdin (EOPG Strasbourg

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