Introduction[]
The 3 primordials have finally start their debut at the newest volume, especially Carerra whose Gravity Collapse can ultimately destroy Jura Forest if unrestrained, which will be calculated in this blog.
Jura Forest[]
Thanks to @Agnaa for helping me pixel scale the map. El Dorado is larger than Australia.
The island(El Dorado) has a surface area of 13,091 pixels. Australia has an area of 7,686,850 km^2, giving a size per pixel^2 of 587.185 km^2, or a length per pixel of 24.232 km.

Longest line through it is 222 pixels, giving a longest length of 5,379.5 kilometers
Radius: 2689.75 km or 2689750 m
Calculation[]
As what Agnaa suggested, we will use ground explosion formula
W = 2689750^3*((27136*1.37895+8649)^(1/2)/13568-93/13568)^2 = 1.5639442e+15 Tons of TNT or 1.56 Petatons (Continent Level)