Proving the Earth is round again

Someone commented to me earlier this week about atmospheric scientists who had posted detection of the shockwave of the Hunga Tonga volcanic eruption in barometric pressure readings from weather stations. They suggested this would be a good opportunity to do a new article for 100 Proofs that the Earth is a Globe.

At first I thought it would take too much time, a resource I have little of these days with all my teaching commitments and trying to squeeze in making comics. But then I began to see more posts on Facebook and Twitter about the event, and they built up a compelling picture. The best thing was a video that a scientist had made showing the shockwave converging on the opposite side of the world. When I saw that I knew I had to write the article.

So yesterday I started work on it. But I really wanted to use that video, and so I wrote an email to the scientist and asked him for permission. And this morning he’d answered to say yes, so it was all systems go. So, here’s the article.

My wife and I went out for pizza tonight to our favourite pizza place. And tonight is virtual board games night with my friends.

New content today:

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