Explosion

An explosion is a physical event, generally destructive, that occurs in several different circumstances. It can destroy nearby blocks, propel and damage nearby entities, and cause fires in some cases. Explosions produce a "shockwave" particle effect.

The propulsion effect of explosions is often used for TNT cannons.

Interaction with entities[edit | edit source]

This feature is exclusive to Java Edition. 

Exposure and impact calculation[edit | edit source]

The explosion impact is used to calculate entity knockback and damage, and it depends on exposure. Impact is stronger the closer and less obstructed the entity is to the explosion.

To calculate the exposure of an entity, rays are cast from the explosion center to a

$\lceil 2\cdot \mathsf{w}\mathsf{i}\mathsf{d}\mathsf{t}\mathsf{h}+1\rceil$ by $\lceil 2\cdot \mathsf{h}\mathsf{e}\mathsf{i}\mathsf{g}\mathsf{h}\mathsf{t}+1\rceil$ by $\lceil 2\cdot \mathsf{l}\mathsf{e}\mathsf{n}\mathsf{g}\mathsf{t}\mathsf{h}+1\rceil$ grid of points, spaced by

${\displaystyle \left[\begin{array}{c}\frac{\text{width}}{2\cdot \text{width}+1}\\ \frac{\text{height}}{2\cdot \text{height}+1}\\ \frac{\text{length}}{2\cdot \text{length}+1}\end{array}\right]}$

With the negative corner at

${\displaystyle \left[\begin{array}{c}\frac{1}{2}(1-\frac{\lfloor 2\cdot \text{width}+1\rfloor }{2\cdot \text{width}+1})\\ 0\\ \frac{1}{2}(1-\frac{\lfloor 2\cdot \text{length}+1\rfloor }{2\cdot \text{length}+1})\end{array}\right]}$

For each ray, the game checks if it intersects with any block-hitbox. The exposure is the proportion of rays that remain unobstructed, and ranges from 0 to 1. These rays go from the entity to the explosion, so scaffolding blocks exposure when the explosion is below and the entity is above. Note that exposure is currently directionally biased (and the ray targets can sometimes be outside the entity) due to bug MC-232355.

The impact for an entity can then be calculated with the following formula:

${\displaystyle (1-\frac{\text{distance}}{2\cdot \text{power}})\cdot \text{exposure}\cdot (1-0.15\cdot \text{highest blast protection level})}$

With the distance measured from the explosion to the entity's feet position. See the Causes subsection for a list of explosion powers, and see Blast Protection for more information about blast protection.

Velocity[edit | edit source]

Each entity within range of an explosion is propelled away from it along the ray from the explosion center to the eyes of the entity, except TNT entities, where the ray goes to the feet of the TNT entity. The magnitude of this applied velocity is the impact.

Each affected entity is accelerated by between 0 and 1 blocks per game tick (0 to 20 blocks per second), added to its current velocity. This effect can accumulate over multiple explosions, even within a single tick.

Damage[edit | edit source]

Entities are damaged differently depending on difficulty. At the end of each game tick the highest amount of damage from all explosions is chosen.

The following term can be used to calculate the damage inflicted on an entity:

${\displaystyle \left(\begin{array}{c}\mathsf{E}\mathsf{a}\mathsf{s}\mathsf{y}\mathsf{:}3.5\\ \mathsf{N}\mathsf{o}\mathsf{r}\mathsf{m}\mathsf{a}\mathsf{l}\mathsf{:}7\\ \mathsf{H}\mathsf{a}\mathsf{r}\mathsf{d}\mathsf{:}10.5\end{array}\right)\cdot \mathsf{p}\mathsf{o}\mathsf{w}\mathsf{e}\mathsf{r}\cdot (\mathsf{i}\mathsf{m}\mathsf{p}\mathsf{a}\mathsf{c}\mathsf{t}+{\mathsf{i}\mathsf{m}\mathsf{p}\mathsf{a}\mathsf{c}\mathsf{t}}^2)+1}$

The Blast Protection enchantment and Resistance effect are handled separately. Explosions don't damage players in Peaceful difficulty. Nether stars cannot be destroyed by explosions.

Block destruction[edit | edit source]

On a small scale explosions form a roughly spherical crater. The size of that crater is dependent on the power of the explosion and the blast resistance of the destroyed blocks.

Calculating which blocks to destroy[edit | edit source]

To calculate the blocks affected, "rays" are created from the explosion center to the outer points of a 16 by 16 by 16 grid. Each of those rays gets an intensity of $\text{power}\cdot (\text{random value from 0.7 to 1.3})$.

For each ray, with the position starting at the explosion center:

1. The game checks the block at the current position (note that this ignores block shape).
2. If the block isn't air, intensity is reduced by $(\text{blast resistance}+0.3)\cdot 0.3$.
3. If the remaining intensity is above 0 and the block can be blown up, it gets added to the list of blocks to blow up.
4. Position is moved 0.3 blocks along the ray.
5. Intensity is reduced by 0.22500001.
6. If the remaining intensity is above 0, repeat from step 1. Otherwise, continue with the next ray.

After the process is done, the list of blocks to blow up is shuffled. For explosions that can cause fires, the game attempts to generate fire in ¹⁄₃ of the blocks in the list. This fire is successfully placed only when above an opaque block.

Due to the fact that the game ignores block shapes when checking blast resistance, explosions happening inside a non-full block get dampened heavily. Sufficiently weak explosions happening on ender chests, enchanting tables, or any height of water or lava do no block damage.

Dropping blocks[edit | edit source]

Blocks destroyed by explosions have a chance to drop items as if mined with an unenchanted diamond tool. Blocks destroyed by TNT have a 100% chance of dropping. Other explosions have a ¹⁄_power chance of dropping items. However, dragon eggs, beacons, conduits, heads, shulker boxes and decorated pots^[1] always drop from explosions.

The drop chance of blocks in explosions can be customized via three game rules: blockExplosionDropDecay‌^{[JE only]} (includes end crystals), mobExplosionDropDecay‌^{[JE only]} and tntExplosionDropDecay. Only tntExplosionDropDecay is set to false by default. If an explosion's drop decay is set to false, items have a 100% chance of dropping.

Causes[edit | edit source]

Cause	Power	Max. blast resistance	Max. range	Fire	Affected by mobGriefing	Notes
Fireball (ghast projectile)	1	3	Entity: 2 Block: 1.5	Yes	Yes
Black wither skull Dangerous wither skull	1	3	Entity: 2 Block: 1.5	No	Yes	Dangerous wither skull: Treats blocks breakable in Survival as having ≤ 0.8 blast resistance.
Creeper	3	9	Entity: 6 Block: 5.1	No	Yes
TNT Underwater TNT‌[BE & edu only]	4	9	Entity: 8 Block: 6.9	No	No	Underwater TNT‌[BE & edu only]: Ignores Water The explosion center is approximately 0.06125 blocks above the TNT's position.
Beds Respawn anchor (when used in a wrong dimension)	5	9	Entity: 10 Block: 8.4	Yes	No	Death message: "(player) was killed by [Intentional Game Design]"
End crystal (when destroyed)	6	9	Entity: 12 Block: 10.2	No	No
Charged creeper	6	9	Entity: 12 Block: 10.2	No	Yes	Drops heads or skulls of mobs killed by explosion.
Wither (when spawned, or when killed‌[BE only])	7	9	Entity: 14 Block: 12	No	Yes
Wither (half health charge move)‌[BE only]	8	--	Entity: 16 Block: 13.8	No	Yes	Breaks any block breakable in Survival (except reinforced deepslate), ignoring blast resistance.

Despite doing damage to entities, fireworks do not destroy terrain and as such are not counted as conventional explosions.

Lab tables sometimes perform a non-terrain-damaging explosion when creating garbage item.‌^{[BE & edu only]}

Blast resistance[edit | edit source]

The following table shows blast resistance values for blocks as shown in Minecraft's code. In Add-on documentation for Bedrock Edition, these values are multiplied by 5 when used for the "explosion_resistance" value in the "minecraft:descructible_by_explosion" component.

[edit values]

Block name	Blast resistance
Barrier	3,600,000.8
Light Block	3,600,000.8
Bedrock	3,600,000
Command Blocks	3,600,000
End Gateway	3,600,000
End Portal	3,600,000
End Portal Frame	3,600,000
Jigsaw Block	3,600,000
Structure Block	3,600,000
Ancient Debris	1,200
Anvil	1,200
Block of Netherite	1,200
Crying Obsidian	1,200
Respawn Anchor	1,200
Enchanting Table	1,200
Obsidian	1,200
Reinforced Deepslate	1,200
Ender Chest	600
Bubble Column	100
Lava	100
Water	100
Ominous Trial Spawner	50
Ominous Vault	50
Trial Spawner	50
Vault	50
Heavy Core	30
Dragon Egg	9
End Stone	9
End Stone Bricks	9
End Stone Brick Wall	9
Andesite	6
Blackstone	6
Block of Coal	6
Block of Copper	6
Block of Diamond	6
Block of Emerald	6
Block of Gold	6
Block of Iron	6
Block of Raw Copper	6
Block of Raw Gold	6
Block of Raw Iron	6
Block of Redstone	6
Bricks	6
Brick Stairs	6
Chain	6
Chiseled Deepslate	6
Cobbled Deepslate	6
Cobblestone	6
Cobblestone Stairs	6
Coral Blocks	6
Deepslate	6
Deepslate Bricks	6
Deepslate Tiles	6
Diorite	6
Gilded Blackstone	6
Granite	6
Grindstone	6
Iron Bars	6
Jukebox	6
Lightning Rod	6
Mossy Cobblestone	6
Nether Bricks	6
Nether Brick Fence	6
Nether Brick Stairs	6
Polished Deepslate	6
Prismarine	6
Purpur Block	6
Purpur Pillar	6
Purpur Slab	6
Purpur Stairs	6
Red Nether Bricks	6
Smooth Quartz Block	6
Smooth Quartz Slab	6
Smooth Quartz Stairs	6
Smooth Stone	6
Stone	6
Stone Bricks	6
Stone Brick Stairs	6
Stone Slab	6
Stone Walls (except End, Sandstone)	6
Tuff	6
Bell	5
Iron Door	5
Iron Trapdoor	5
Monster Spawner	5
Hopper	4.8
Basalt	4.2
Polished Basalt	4.2
Smooth Basalt	4.2
Stained Terracotta	4.2
Terracotta	4.2
Cobweb	4
Lodestone	3.5
Blast Furnace	3.5
Dispenser	3.5
Dropper	3.5
Furnace	3.5
Lantern	3.5
Soul Lantern	3.5
Smoker	3.5
Stonecutter	3.5

Block name	Blast resistance
Observer	3
Beacon	3
Block of Lapis Lazuli	3
Coal Ore	3
Cocoa Beans	3
Conduit	3
Copper Ore	3
Deepslate Coal Ore	3
Deepslate Copper Ore	3
Deepslate Diamond Ore	3
Deepslate Emerald Ore	3
Deepslate Gold Ore	3
Deepslate Iron Ore	3
Deepslate Lapis Lazuli Ore	3
Deepslate Redstone Ore	3
Diamond Ore	3
Emerald Ore	3
Gold Ore	3
Iron Ore	3
Lab Table	3
Lapis Lazuli Ore	3
Mud Bricks	3
Nether Quartz Ore	3
Packed Mud	3
Planks	3
Pointed Dripstone	3
Redstone Ore	3
Sculk Catalyst	3
Sculk Shrieker	3
Wooden Fences	3
Fence Gates	3
Wooden Doors	3
Wooden Slabs	3
Wooden Stairs	3
Wooden Trapdoors	3
Blue Ice	2.8
Barrel	2.5
Cartography Table	2.5
Chest	2.5
Crafting Table	2.5
Dried Kelp Block	2.5
Fletching Table	2.5
Lectern	2.5
Loom	2.5
Smithing Table	2.5
Trapped Chest	2.5
Bone Block	2
Campfire	2
Soul Campfire	2
Cauldron	2
Compound Creator	2
Shulker Box	2
Dyed Shulker Box	2
Wood	2
Concrete	1.8
Amethyst Bud	1.5
Amethyst Cluster	1.5
Block of Amethyst	1.5
Bookshelf	1.5
Budding Amethyst	1.5
Sculk Sensor	1.5
Glazed Terracotta	1.4
Bamboo	1
Banners	1
Dripstone Block	1
Jack o'Lantern	1
Heads	1
Nether Wart Block	1
Pumpkin	1
Shroomlight	1
Signs	1
Warped Wart Block	1
Block of Quartz	0.8
Note Block	0.8
Quartz Stairs	0.8
Red Sandstone	0.8
Red Sandstone Stairs	0.8
Sandstone	0.8
Sandstone Stairs	0.8
Sandstone Wall	0.8
Wool	0.8
Calcite	0.75
Infested Blocks	0.75
Activator Rail	0.7
Detector Rail	0.7
Powered Rail	0.7
Rail	0.7
Mangrove Roots	0.7
Muddy Mangrove Roots	0.7
Dirt Path	0.65
Beehive	0.6
Clay	0.6
Composter	0.6
Farmland	0.6
Grass Block	0.6
Gravel	0.6
Honeycomb Block	0.6
Sponge	0.6
Wet Sponge	0.6
Mycelium	0.6

Block name	Blast resistance
Brewing Stand	0.5
Buttons	0.5
Cake	0.5
Coarse Dirt	0.5
Concrete Powder	0.5
Dirt	0.5
Frosted Ice	0.5
Hay Bale	0.5
Ice	0.5
Lever	0.5
Magma Block	0.5
Mud	0.5
Packed Ice	0.5
Piston	0.5
Piston Head	0.5
Podzol	0.5
Pressure Plates	0.5
Rooted Dirt	0.5
Sand	0.5
Soul Sand	0.5
Soul Soil	0.5
Sticky Piston	0.5
Target	0.5
Turtle Egg	0.5
Cactus	0.4
Chorus Flower	0.4
Chorus Plant	0.4
Ladder	0.4
Netherrack	0.4
Nylium	0.4
Bee Nest	0.3
Froglight	0.3
Glass	0.3
Glass Pane	0.3
Glowstone	0.3
Redstone Lamp	0.3
Sea Lantern	0.3
Stained Glass	0.3
Stained Glass Panes	0.3
Tinted Glass	0.3
Powder Snow	0.25
Beds	0.2
Daylight Detector	0.2
Glow Lichen	0.2
Leaves	0.2
Mushroom Blocks	0.2
Sculk	0.2
Sculk Vein	0.2
Snow Block	0.2
Vines	0.2
Candle	0.1
Dyed Candle	0.1
Carpets	0.1
Big Dripleaf	0.1
Moss Block	0.1
Moss Carpet	0.1
Snow	0.1
Air	0
Azalea	0
Beetroots	0
Carrots	0
Cave vines	0
Colored Torch	0
Corals	0
Coral Fans	0
Dead Bush	0
Element	0
End Rod	0
Fire	0
Flowers	0
Flower Pot	0
Frogspawn	0
Fungus	0
Grass	0
Hanging Roots	0
Honey Block	0
Kelp	0
Lily Pad	0
Locked chest	0
Melon Stem	0
Moving Piston	0
Mushrooms	0
Nether Sprouts	0
Nether Wart	0
Potatoes	0
Pumpkin Stem	0
Redstone Dust	0
Redstone Comparator	0
Redstone Repeater	0
Redstone Torch	0
Crimson Roots	0
Warped Roots	0
Saplings	0
Scaffolding	0
Seagrass	0
Sea Pickle	0
Slime Block	0
Small Dripleaf	0
Soul Fire	0
Spore Blossom	0
Structure Void	0
Sugar Cane	0
Sweet Berry Bush	0
TNT	0
Torch	0
Soul Torch	0
Tripwire	0
Tripwire Hook	0
Twisting Vines	0
Underwater Torch	0
Underwater TNT	0
Weeping Vines	0
Wheat	0
Nether Portal	-1

Sounds[edit | edit source]

Java Edition:

{ "pitch": "0.56-0.84", "subtitle": "​Explosion", "source": "Blocks", "id": "entity.generic.explode", "distance": "16", "desc": "When something explodes", "sounds": [ "Explosion1.ogg", "Explosion2.ogg", "Explosion3.ogg", "Explosion4.ogg" ], "volume": "4.0", "java": "1", "translationkey": "subtitles.entity.generic.explode" }

Bedrock Edition:

{ "sounds": [ "Explosion1.ogg", "Explosion2.ogg", "Explosion3.ogg", "Explosion4.ogg" ], "source": "Blocks", "volume": "4.0", "id": "random.explode", "pitch": "1.0", "bedrock": "1", "desc": "When something explodes" }

History[edit | edit source]

Trivia[edit | edit source]

• Explosions with a power greater than 100 look mostly the same from the outside, as only certain lines are used to determine if a block breaks. However, some of those lines continue underground.
• Explosions that occur in flowing water or lava apply propulsion to entities, but don't affect any blocks, regardless of the blocks' blast resistance.
• Underwater explosions don't emit smoke particles.
• Explosions can redirect projectiles, including ender pearls.
• An explosion just after a mob's death can propel the mob's body.
• If a falling sand entity falls into primed TNT when in water, it deals block damage.

References[edit | edit source]

Navigation[edit | edit source]