WEBVTT FILE 1 00:00:00.010 --> 00:00:04.000 [music throughout] On April 2 -3, 2017, the sun let off a trio of mid-level flares. 2 00:00:04.020 --> 00:00:08.000 This is what was seen by NASA's Solar Dynamics Observatory. 3 00:00:08.020 --> 00:00:12.050 4 00:00:12.070 --> 00:00:16.090 5 00:00:16.110 --> 00:00:20.090 6 00:00:20.110 --> 00:00:24.120 7 00:00:24.140 --> 00:00:28.140 8 00:00:28.160 --> 00:00:32.160 9 00:00:32.180 --> 00:00:36.170 10 00:00:36.190 --> 00:00:40.180 11 00:00:40.200 --> 00:00:44.180 12 00:00:44.200 --> 00:00:48.190 13 00:00:48.210 --> 00:00:52.200 14 00:00:52.220 --> 00:00:56.220 15 00:00:56.240 --> 00:01:00.230 16 00:01:00.250 --> 00:01:04.260 17 00:01:04.280 --> 00:01:08.270 18 00:01:08.290 --> 00:01:12.280 19 00:01:12.300 --> 00:01:16.310 tone 20 00:01:16.330 --> 00:01:20.310 beeping 21 00:01:20.330 --> 00:01:22.429