How did WW learn LV evaporated?

[Ceridwen]

No: HPFGUIDX 166376

Goddlefrood:
> > To summarise, Hagrid sped around some wizarding parties during 
the course of the time he was travelling between Godric's Hollow and 
Little Whingeing, and well, the rest is surely not for me to 
specualte on here ;).

houyhnhnm:
> There may not have been witnesses to the actual attack, but there 
could have been other Wizarding families in the general vicinity of 
Godric's Hollow just as there are in Ottery St. Catchpole. They could 
have heard a noise from the explosion. They probably wouldn't have 
gotten too close. Once it got into the rumour mill, the news would 
have had all night to get around and it would have spread like 
wildfire.

Even if Hagrid wasn't the only source, I'm sure he played his part.

Ceridwen:
First, I don't see how there would have been wizarding parties on 1 
November if Hagrid was one of the principle means of spreading the 
news of LV's demise.  If no one knew that LV had been 'killed', there 
would have been no parties for Hagrid to visit in order to tell the 
news.  The parties were because LV had 'died'.  And by afternoon on 
the first, people knew that the Potters had something to do with it, 
along with their son Harry.  We know this because Vernon overheard 
them mentioned, which is why he asked Petunia what her nephew's name 
was when he got home.  I can't imagine witches and wizards showing 
themselves to Muggles in the giddy fashion described in PS/SS if they 
weren't sure something significant had happened at GH.

If there were wizarding families in the area, perhaps someone saw LV 
entering the Potters' home.  Muggles like Petunia aren't the only 
ones who peer out their windows at the neighbors.  Someone witnessing 
this could contact the Ministry and continue to watch out the window.

Or not even contact the Ministry for fear of their lives, watching 
out the window and waiting for LV to leave and cast the Dark Mark so 
they could then inform the Ministry without risking him finding out 
that they were the one to set the Ministry on him.  I get the 
impression that the entire WW lived in fear back then.

So, the neighbor might watch, until the explosion and no sign of 
Voldemort leaving.  At this point, they might contact the Ministry, 
and then a friend by floo, cautiously tell that friend what had 
happened, and that friend might floo someone else, leaving off the 
caution or downplaying it, and by the fourth round of floo calls, the 
news was out - accurately as it turned out, but not necessarily 
accurate to the first mention of it.  Like the children's game 
of "telephone".

Ceridwen.