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What is the range of an explosion in Minecraft?

I know it is affected by the type of block, snow being the least blast resistance and bedrock being the most blast resistance.

It would be nice if there was a list of ranges with the different kinds of blocks surrounding the origin of the explosion.

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If you haven't already, I suggest you check out – Raven Dreamer Sep 24 '11 at 16:19
What kind of explosion? Creeper? TNT? – Joe the Person Sep 24 '11 at 16:35
Depends on what's exploding. For example, a charged creeper has a bigger explosion radius than a regular one. – Keaanu Sep 24 '11 at 16:50
Also, relevant. – Keaanu Sep 24 '11 at 16:55
@Keaanu that's already been mentioned in the First Comment. – Joe the Person Sep 24 '11 at 19:04
up vote 11 down vote accepted

The short answer is, it depends. The long answer is, try reading through the wiki page. The medium answer, then, is perhaps the most interesting…

The radius of an explosion is dependent on three main factors: the "power" of the explosion, the explosion "resistance" of the materials being destroyed, and a random factor.

Explosion power is 4 (approximately four blocks) for TNT, 3 for uncharged creepers, 6 for charged creepers, just 1 for ghast fireballs, and 5 for nether beds. Block resistance varies wildly, from 0 for air and weak blocks like redstone wiring, to 30 for most types of stone, to 18,000,000 for bedrock!

When an explosion occurs, it sends out a large number of invisible "rays", each with 70%-130% of the explosion's power. When a ray strikes a block, it's power is applied to the block's resistance. If the power is higher, the block is destroyed and the weakened ray travels on. If the resistance is higher, the ray is stopped, but the block is weakened against other rays.

The upshot of this is that explosions travel to a maximum of 1.3 times their power in blocks, through air. So airburst TNT will reach about 5.2 blocks from its center. Through solid stone, however, TNT will only carve out a single block on all sides (a radius more than one, but less than two).

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This is much more comprehensible than the wiki. – SevenSidedDie Sep 25 '11 at 3:42
@SevenSidedDie — The wiki is extremely accurate, but not very approachable. I've sacrificed some technical accuracy here to hopefully make it easier to visualize what's happening. ;-) – Ben Blank Sep 25 '11 at 4:58

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