02042nas a2200373   4500000000100000000000100001008004100002260000800043653006000051653001200111653001900123653004600142653004900188653002300237653002600260653002900286100001700315700001400332700001400346700001600360700001700376700001800393700001800411700001500429700001600444700001400460700001200474245013300486856004300619300001100662490000700673520097400680020001401654       2010                            d  bAGU10a3045 Marine Geology and Geophysics: Seafloor morphology10ageology10aand geophysics10a8404 Volcanology: Volcanoclastic deposits10a8488 Volcanology: Volcanic hazards and risks10abathymetry surveys10amarine sediment cores10aSoufrière Hills Volcano1 aA. Le Friant1 aC. Deplus1 aG. Boudon1 aN. Feuillet1 aJ. Trofimovs1 aJ. Komorowski1 aR.S.J. Sparks1 aP. Talling1 aS. Loughlin1 aM. Palmer1 aG. Ryan00aEruption of Soufrière Hills (1995\textendash2009) from an offshore perspective: Insights from repeated swath bathymetry surveys  uhttp://dx.doi.org/10.1029/2010GL043580  aL113070 v373 aThis contribution provides an analysis of the 1995\textendash2009 eruptive period of Soufrière Hills volcano (Montserrat) from a unique offshore perspective. The methodology is based on five repeated swath bathymetric surveys. The difference between the 2009 and 1999 bathymetry suggests that at least 395 Mm3 of material has entered the sea. This proximal deposit reaches 95 m thick and extends \~7km from shore. However, the difference map does not include either the finer distal part of the submarine deposit or the submarine part of the delta close to the shoreline. We took both contributions into account by using additional information such as that from marine sediment cores. By March 2009, at least 65\% of the material erupted throughout the eruption has been deposited into the sea. This work provides an excellent basis for assessing the future activity of the Soufrière Hills volcano (including potential collapse), and other volcanoes on small islands.  a0094-8276