Oddly enough, I haven't been checking the sim for a while now, weeks, and I happen to look at the sim RIGHT as the event occurred because I was bored and randomly decided to check the sim... That is why I had the original URL to the image. After refreshing the image about a minute later it was over. If there was a density and temperature plot over time, say months, I wonder if there is any kind of pattern or frequency of such events. This event would be easy to find because the density spike is always accompanied with a drop in temperature, a very extreme and sharp drop.