@article{fdi:010061804, title = {{F}requency and magnitude of volcanic eruptions controlled by magma injection and buoyancy}, author = {{C}aricchi, {L}. and {A}nnen, {C}. and {B}lundy, {J}. and {S}impson, {G}. and {P}inel, {V}irginie}, editor = {}, language = {{ENG}}, abstract = {{S}uper-eruptions are extremely rare events. {I}ndeed, the global frequency of explosive volcanic eruptions is inversely proportional to the volume of magma released in a single event(1,2). {T}he rate of magma supply, mechanical properties of the crust and magma, and tectonic regime are known to play a role in controlling eruption frequency and magnitude(3-7), but their relative contributions have not been quantified. {H}ere we use a thermomechanical numerical model of magma injection into {E}arth's crust and {M}onte {C}arlo simulations to explore the factors controlling the recurrence rates of eruptions of different magnitudes. {W}e find that the rate of magma supply to the upper crust controls the volume of a single eruption. {T}he time interval between magma injections into the subvolcanic reservoir, at a constant magma-supply rate, determines the duration of the magmatic activity that precedes eruptions. {O}ur simulations reproduce the observed relationship between eruption volume and magma chamber residence times and replicate the observed correlation between erupted volumes and caldera dimensions(8,9). {W}e also find that magma buoyancy is key to triggering super-eruptions, whereas pressurization associated with magma injection is responsible for relatively small and frequent eruptions. {O}ur findings help improve our ability to decipher the long-term activity patterns of volcanic systems.}, keywords = {}, booktitle = {}, journal = {{N}ature {G}eoscience}, volume = {7}, numero = {2}, pages = {126--130}, ISSN = {1752-0894}, year = {2014}, DOI = {10.1038/ngeo2041}, URL = {https://www.documentation.ird.fr/hor/fdi:010061804}, }