On July 25, 2018, at 21h55 UT, the second most energetic fireball of the past 7 months of 2018 was recorded over North-Western Greenland. With a calculated impact energy of 2.1 kt of TNT, it was slighlty less energetic than the Russian daytime event on June 21st, 01h16 UT, (which calculated energy ranged to 2.8 kt of TNT).

Map of the most energetical meteoric events since April 1988, as recorded by US governement sensors. The July 25 Greenland fireball is the green dot on the North-Western part of Greenland. Credit: Alan B. Chamberlin (JPL/Caltech)

Map of the most energetical meteoric events since April 1988, as recorded by US governement sensors. The July 25 Greenland fireball is the green dot on the North-Western part of Greenland. Credit: Alan B. Chamberlin (JPL/Caltech)

The meteoroid entered the atmosphere at a 24 km/s speed. The altitude of the final explosion was calculated to be around 43 km, at coordinates (lat. ~ 76.9°N ; lon. ~ 69.0° W), which is over the North-Western coast of the country, at a 30 km horizontal distance from the sea.

Map of July 25, 2018, 21h 55 UT fireball over North-Western Greenland, relative to neighbouring American Thule Air Base and Qaanaaq village.

Map of July 25, 2018, 21h 55 UT fireball over North-Western Greenland, relative to neighbouring American Thule Air Base and Qaanaaq village.

Explosion occured 40 km North of the American Thule Air Base, and was reported by several inhabitants from the nearby village of Qaanaaq, located 60 km North of the terminal explosion. The close proximity to this AirForce Base leads to very fast checks that it was not a Russian missile, which proves not to be.

No visual reports were recorded by the International Meteor Organization so far. If you observed or recorded this meteoric event, please don’t hesitate to fill in the Online Fireball Report Form. It’s fast, easy, and does not require any knowledge in science or astronomy!

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