# April 5, 1949 — nr. Los Alamos, NM — Huge Green Fireball Near Los Alamos

**URL:** <https://uapdiscovery.discourse.group/t/april-5-1949-nr-los-alamos-nm-huge-green-fireball-near-los-alamos/542>\
**Category:** Blue Book Unknowns\
**Created:** [April 5, 2026, 1:03am UTC](https://uapdiscovery.discourse.group/t/april-5-1949-nr-los-alamos-nm-huge-green-fireball-near-los-alamos/542 "2026-04-05T01:03:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)\
**Post date:** [April 5, 2026, 1:03am UTC](https://uapdiscovery.discourse.group/t/april-5-1949-nr-los-alamos-nm-huge-green-fireball-near-los-alamos/542/1 "2026-04-05T01:03:21Z")

</div>

![04051949-LosAlamosNM-Table](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/0/07c2fc33b8919b376143ac9b22175405a47e2dd3.jpeg)

10:00 p.m. A huge green fireball with a red afterglow is seen streaking approximately 300 feet above the southern slope of Fejarito Mountain, near Los Alamos, New Mexico. It disappears behind the mountain. Another fireball is seen at 11:00 p.m., and the next two nights. [Eberhart]

Sources:  
Blue Book Microfilm Roll 91, pp. 416-417;

 ![04051949-LosAlamosNM-PBB91-416](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/1/19696d8e235244d3ffc6e0b0936f384d2b641070.jpeg)

 ![04051949-LosAlamosNM-PBB91-417](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/e/e24efe56c22d005660ba28eb88052c7d2977e728.jpeg)

Brad Sparks, Blue Books Unknowns Catalogue, Case 191, p. 56;

 ![04051949-LosAlamosNM-Sparks-Case191-p54](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/b/bb122ee97624bca9d8822709a080856c3cdd6c04.png)

NICAP, “1949 UFO Chronology”;

 ![04051949-LosAlamosNM-NICAPChronos](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/0/0f812846c445039a5b7f7dd72bcf7b43b65d3fcb.png)

> **[1949 Chronology](http://www.nicap.org/chronos/1949fullrep.htm)**