Alien Crash Site Locations?

[TropicalSlug]

Hey all, I know this has most likely been covered in other threads, but I wanted to see if we all could band together and figure out the locations of the alien crash sites in the Commonwealth.

From what I understand, the crash itself is a random event, but what I don't yet know is where the different crash locations are on the map. For me, I just leveled to rank 19, and fast traveled to the Cambridge Police Station, when I suddenly heard what sounded like an aircraft flying overhead, followed by a distant explosion. However, I wasn't looking at the screen when it happened and I don't know where it crashed! Does anyone know where it may have splashed down?? I figure it must be in the area of the Police Station, but it could be ANYWHERE within the radius of where the event was triggered.

Also, anyone else who has had this event happen to them should post it here so we can have a central repository for idiots like me who weren't paying attention. Screenshots help too!

Thanks Wastelanders!

Edit: it was rank 20, not 19.

[Sosig]

If you saved the game, like i did before leaving a dungeon/wherever and then look up into the sky you can see it fall down, just follow where you see it crash until you found it, then follow the blood trail to the alien and kill it.

edit; it may seem stupid but you do see it fall down and crash if you look into the sky.