Hi guys. About 20 minutes ago, around 9.00 I heard a strong ‘boom’ sound. Strong enough to shake the house. I’ve heard similar sound in the past maybe 2-3 times, Not close to each other. I live around Zollikofen, north of Bern. Do you have idea what was it? submitted by /u/sector2000
Originally posted by u/sector2000 on r/Switzerland
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