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. In this paper we present the first identification of foreshock cavitons andthe formation of spontaneous hot flow anomalies (SHFAs) with the Vlasiatorglobal magnetospheric hybrid-Vlasov simulation code. In agreement withprevious studies we show that cavitons evolve into SHFAs. In the presentedrun, this occurs very near the bow shock. We report on SHFAs surviving theshock crossing into the downstream region and show that the interaction ofSHFAs with the bow shock can lead to the formation of a magnetosheath cavity,previously identified in observations and simulations. We report on the firstidentification of long-term local weakening and erosion of the bow shock,associated with a region of increased foreshock SHFA and caviton formation,and repeated shock crossings by them. We show that SHFAs are linked to anincrease in suprathermal particle pitch-angle spreads. The realistic lengthscales in our simulation allow us to present a statistical study of globalcaviton and SHFA size distributions, and their comparable size distributionssupport the theory that SHFAs are formed from cavitons. Virtual spacecraftobservations are shown to be in good agreement with observational studies.

Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation