Mercury has its own magnetic field as has been revealed by Mariner 10 in 1970's and confirmed by NASA's MESSENGER mission recently. Even if the planetary magnetic dipole strength is about 2500 times smaller, it is sufficient to form magnetosphere structure similar to the Earth's magnetosphere. Due to the minimum data from in-situ measurements, there are lot of open questions on the magnetospheric properties and processes. Global numerical simulations helps to address and answer some of them. Simulations proved useful for predictions of features to be investigated using real data and they give global context to local measurements.
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