Magnetic flux density measurements by the RPC-MAG instrument on board the Rosetta spacecraft during two different three-week periods. (a) |B| as a function of time during the first approach to comet 67P as a function of time. (b) The data in panel a reordered according to cometocentric distance. (c) |B| as a function of time during the close flybys in February 2015. (d) The data in panel c reordered according to cometocentric distance. The black curves show a running median of the sorted data.