I live on SJI too. I just found this site, so sorry for being so late in seeing your post here.
I remember back in Aug hearing those loud booms too…sitting in my living room and wondering what in the hell was that?
I’ve heard loud booms before, but not for a few years.
Back around 2010-2011 I heard really loud booms here in the very early AM, before civil twilight even along with lots of folks in Vancouver BC…..it was all over the net at the time. Seem to remember they were a couple in the AM and then a few days, weeks later it would happen again…then it stopped, at least in the AM, when it is so easy to hear anything as it’s so quiet and I’m cleaning my horse barn.
Anyway, Ashley, so good to hear from a fellow islander here reporting.