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Fig. 4
Average activity (ZHRv) of the Eta-Aquariid meteor shower, as measured with the CMOR 29 system (blue) and the 38 MHz system (green) between 2002 and 2019, the VMN (red) between 2011 and 2019, and visual observations from the IMO from 1988 to 2007 (Rendtel & Arlt 2008, in black).
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