Astromaterials Research & Exploration Science
METEORITE FALLS

PROBABLE FALL NEAR CARROLLTON, AL

PROBABLE FALL NEAR CARROLLTON, AL

PROBABLE FALL NEAR CARROLLTON, AL

DATE/TIME

11/10/2018 @ 10:49 UTC

11/10/2018
10:49 UTC

LAT/LONG

33.254633 • -87.979293

33.254633
-87.979293

This is an estimated landing site map for this fall, color coded according to mass. Red is 10 kg-mass meteorites, scaling down to yellow single-gram stones. Edit: See Summary, at the bottom.

STREWN FIELD

This is an estimated landing site map for this fall, color coded according to mass. Red is 10 kg-mass meteorites, scaling down to yellow single-gram stones. Edit: See Summary, at the bottom.

SUMMARY

This event was a PROBABLE meteorite fall that occurred at 04:49 AM local time on 10 November 2018, the 243rd birthday of the United States Marine Corps. This is 10 Nov 2018 at 10:49:52 UTC. Events are recorded as “probable” if they produce well-defined signatures of a meteorite fall in weather radar imagery at the time and place described by eyewitnesses, but no meteorites have been recovered from the event to date. The fireball was an early morning fireball observed by allsky cameras from the NASA Meteoroid Environment Office and seventeen eyewitnesses reported it to the American Meteor Society across Alabama and Georgia. One eyewitness near Calhoun, GA reported hearing sonic booms from the falling meteorites but the distance involved makes this an error.

Meteorites have not been recovered from this event, to date.

The NASA Meteoroid Office calculated the pre-atmospheric orbit of the parent meteoroid, and determined that it has an orbit very close to that of the Earth-Moon system, with a very low infall speed of 12 km/s. This speed is too fast for “space junk” and must be a meteoroid. One possible explanation is that this is a meteorite originating from the Moon, or a lunar meteorite.

NASA's Meteoroid Environment Office maintains a suite of all-sky meteor cameras across the U.S. All meteors seen by this system are recorded on a web page, and the Carrollton event is seen here:

https://fireballs.ndc.nasa.gov/20181113.html

Scroll down to the event at 10:49:49 UTC. Four videos were recorded of the event, click on the picture of the video to download the file. The analysis summary for this event shows an orbit that closely matches the Earth and Moon, suggesting that this might be a lunar meteorite fall (bottom center in this picture):

https://fireballs.ndc.nasa.gov/evcorr/20181113/20181110_104949A/event.png 

This event is recorded as American Meteor Society event number 4,773 for 2018. Signatures of falling meteorites can be found in imagery from two nearby weather radars. In the NEXRAD weather radar network operated by NOAA, the KDGX (Jackson-Brandon, MS) and KGWX (Columbus AFB, MS) radars record signatures of falling meteorites.

The first appearance of falling meteorites on radar occurs at 10:51:16 UTC and 15,570 m above sea level (ASL) in the 10:43 UTC data set for the KDGX radar in the 3.5 degree elevation radar sweep. Signatures consistent with falling meteorites appear in a total of six radar sweeps from the two radars, with a final signature appearing at 11:06:29 UTC.

Edit [26 Nov 2018]: Updated strewn field map posted with slight changes to accommodate the calculated landing sites of individual radar signatures. The yellow and orange polygons overlaid on the calculated strewn field are the radar return landing sites.

LEARN MORE

RADAR & MAPS

This composite image shows all the radar signatures from falling meteorites as blue/gray polygons. This probable meteorite fall has not yet been recovered.

RADAR SUMMARY

This composite image shows all the radar signatures from falling meteorites as blue/gray polygons. This probable meteorite fall has not yet been recovered. "N4 Z47B" is a seismometer.

GET DIRECTIONS

Click on the View larger map link that is displayed in the address box above in order to get directions to the strewn field area.

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METEORITES 101

This step-by-step guide will show you how to locate possible meteorite fall sites using radar software and weather data along with info provided by reporting agencies and monitoring systems.
These instructions will show you how to best preserve the meteorites you discover and how to make contact with the organizations that are willing to accept and analyze your find.
Don't know exactly what a meteorite is, what they are made of or where they come from? If that's the case, we have provided a mini-"crash" course in what you need to know about them.
It turns out that meteorites have provided us a lot of scientific insight, not only into the origins of our solar system and planet Earth, but what the future might hold for mankind.
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