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https://en.wikipedia.org/wiki/December_18
2018 – List of bolides: A meteor exploded over the Bering Sea with a force over 10 times greater than the atomic bomb that destroyed Hiroshima in 1945.
https://www.space.com/bering-sea-fireball-satellite-photos.html
Imagine if this hit a city?
How many people know about this?
On Dec. 18, 2018, an incoming space rock detonated 16 miles (26 kilometers) above the Bering Sea's icy waters, generating 173 kilotons of energy. That's about 10 times more than the amount unleashed by the atomic bomb the United States dropped on the Japanese city of Hiroshima during World War II, NASA officials said.
Only one impact event since 2000 was more powerful — the February 2013 airburst over the Russian city of Chelyabinsk, which produced a shockwave that injured more than 1,200 people. (Most of those folks were hurt by shards of flying glass from broken windows.)
The object that caused the Bering Sea fireball was probably about 33 feet (10 meters) wide and weighed about 1,500 tons (1,360 metric tons), according to NASA meteor experts. The rock likely hit Earth's atmosphere going about 71,600 mph (115,200 km/h).
Scientists think the Chelyabinsk asteroid was about 65 feet (20 m) wide at the time of its dramatic encounter with Earth. That object's explosion unleashed a whopping 440 kilotons of energy.
But that output pales in comparison to a 1908 airburst over Siberia, which involved an asteroid thought to be about 130 feet (40 m) wide. This explosion, known as the Tunguska event, generated 185 times more energy than the Hiroshima bomb and flattened about 800 square miles (2,000 square kilometers) of forest. It's the most powerful impact event in recorded history.