AAVSO Sudden Ionospheric Disturbance Report Observer: A118 Station: AA24 40 130509 1740 1815 1745 2 3AA24 A118 40 130511 1937 2017 1946 2 3AA24 A118 40 130516 1920 2000 1923 2 5AA24 A118 40 130523 1822 1844D1826 1 2AA24 A118 40 130523 1844 1930 1846 2+ 2AA24 A118