Watching rain drops hit a puddle or lake is remarkably fascinating. Each drop creates a little cavity in the water surface when it impacts. Large, energetic drops will create a crown-shaped splash, like the ones in the upper animation. When the cavity below the surface collapses, the water rebounds into a pillar known as a Worthington jet. Look carefully and you’ll see some of those jets are energetic enough to produce a little satellite droplet that falls back and coalesces. Altogether it’s a beautifully complex process to watch happen over and over again. (Image credit: K. Weiner, source)


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Japan Hit By ‘Unprecedented’ Rainfall, Causing Disastrous Flooding

Eastern Japan was hit by widespread, dangerous flooding and more than 60 landslides this week after a tropical storm brought heavy rainfall and levees holding the Kinugawa River broke.

The flooding has forced more than 90,000 people to flee their homes, according to the BBC, and rescue workers have been using helicopters and boats to rescue people from the floodwaters. As of Thursday, in Osaki City, Japan, one person was missing, 21 people were injured and 1,000 homes were damaged, according to Japan’s Fire and Disaster Management Agency. Also in Osaki City, CNN reports that three people have died. In Joso, Japan — which is north of Tokyo — more than 10,000 homes were likely damaged.