12 instances from 2 years 2017 - 2 instances Jan 6 7 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 20 4 Sep 20, 2016 4 instances 04:10:20 04:14:12 04:14:53 04:18:59 Oct 1 2 Oct 1, 2016 2 instances 13:08:38 13:16:42 4 3 Oct 4, 2016 3 instances 04:09:35 04:11:16 04:11:58 Nov Dec 29