I just came across this cool old time-lapse video made by scientists from the US Geological Survey: The collapse of the crater floor of the Puʻu ʻŌʻō, one of the cones of the Kīlauea volcano in Hawaii.
The video, filmed on March 5, 2011, "starts at 4 am and ends at 11 pm. The floor of the crater dropped about 115 meters (377 ft) in just a few hours."
The Puʻu ʻŌʻō has been erupting continuously since January 3, 1983, making it the longest-lived rift-zone eruption of the last two centuries.
Here's a view of this mother from afar:
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