The Millennium Earl completely erased Edo, it totally disappeared, the structures, the landscape, life in general, even the ground has been seared to glass, perfect annihilation. We'll look at the blast's radius first.
Edo = Tokyo's old name.
Yes, Tokyo isn't circular, but the blast was, and it had to cover every bit of Edo at the very least to completely erase it as it did, so taking the half of the distance between the two farthest (roughly) points in Edo as the radius of the blast is logical.
This is Edo from the end of the 19th Century, as this is the date of D.Gray-Man's setting:
Distance between the two farthest points in end-of-19th century Edo = 298 pixels = 12.9565217391 kilometres ≈ 13 kilometres
∴ Blast radius = 6.5 kilometres
The ground (sand) was totally seared into glass, we have to take that (melting of sand) into account.
Volume of sand melted = area (m^2. the area the blast covered) * thickness (m. For safety, we cannot assume that anything more than the surface has been scorched, so we'll go with a very conservative thickness of 0.0254 metres (1 inch)) = (6500^2*pi)*0.0254 = 3371400.1562 metres^3
Ambient temperature (taken as average room temperature) = 296.15°K
Latent heat of fusion (Silica. Same reasoning above.) = 3400 cal/mol = 14231.72 J/mol = 236879.494008 J/kg (divided the latent heat of fusion in J/mol by the molar mass in kg/mol) [ source: www.docenti.unina.it/downloadPub.do?tipoFile=md&id=352455 ] (auto-download PDF file) Energy required to melt that amount of sand = (mass * specific heat (sand) * change in temperature [melting point - room temperature]) + (mass * latent heat of fusion) = (5400983050.23*830*1690)+(5400983050.23*23687.494008) = 7.7038947*10^15 joules = 1.841275023900573515 Megatons of TNT= Small City-Level
Since that's the energy required to sear the ground alone, not taking in the total vaporization of all the buildings and structures, it's obvious that the blast is at least City-Level.
Eva01 I don't take quick looks, i thoroughly read. And everything seems fine safe for one assumption, the assumption that Edo is the same size as current Tokyo. I'm pretty sure it's smaller in D. Gray Man given the older look of the buildings and the fact it's set in the 19th century where Tokyo/Edo was still smaller especially in terms of citizens. I'd rather only use the special wards, given this german map of Tokyo from 1896.
So could Tokyo/Edo really have expanded to three times its size in just 110 years? Especially after all the bad earthquakes and tsunamis Japan has been going through for the past decades? It's possible, but we must have a map of the entirety of Edo at hand. Although I will say that Edo should definitely be smaller than modern Tokyo, that I agree with.
And we do (I think). But I can't read Japanese for shit:
Eva01 Given how in the last 110 years the former Edo annexed the western cities according to the history of Tokyo and the english wikipedia page on Tokyo (under geography and administrative divisions sections it says that until 1943 Tokyo was only the special wards). It's like how while growing as a metropolis a big city swallows up the surrounding towns to be part of it, causing it to rapidly expand in size. Given how Tokyo was also destroyed multiple times allowing for easier rebuilding and the populace grew about 8-fold in the last 130 years (from 1.7 million to 13.4 million) it's quite reasonable.
Eva01 Well kinda looks closer to the 23 special wards which was Tokyo until 1943, albeit even smaller. Nice find btw.
BTW i think i found a few better maps.
One from 1898
And one from the in 1908 published Meyers Lexicon Books collection.
Both are in german btw, but it's easier to translate. Just got them by googling "tokyo map end of 19th century" in google images.
First one should be credible given in wikipedia it's described as a German map from 1896 (from the Tokyo page) and it's source has been stated. Hope it helps better with scaling, given it's got the metric system already there on the scale.
There's 3 problems though: 1- I can't view the entire map in full res. 2- The UI for navigating the map and zooming is horrendous. 3- And this is the real problem, the map is so fucking detailed with so much shit on it I can't tell what's what, ironically enough, and I can't see Tokyo's border.
It's a nightmare to work with. It's good as it gets but good luck actually trying to extract any information from it. Fuckin' hell -_-
Eva01 I think you're just better off using that first german map i just showed you, 1896 is pretty close to the end of the 19th century after all and they aren't as detailed but still show the borders good enough.
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Old Man Dream: Know it's a bit unusual for me to pick a movie with Words Bubble Up Like Soda Pop. But that one's on Netflix for those curious.
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Merry Menos: Merry Christmas!!!
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