diff --git a/paper-api/src/main/java/io/papermc/paper/event/entity/EntityPotentSulfurLaunchEvent.java b/paper-api/src/main/java/io/papermc/paper/event/entity/EntityPotentSulfurLaunchEvent.java
new file mode 100644
index 000000000000..20e847f4321b
--- /dev/null
+++ b/paper-api/src/main/java/io/papermc/paper/event/entity/EntityPotentSulfurLaunchEvent.java
@@ -0,0 +1,84 @@
+package io.papermc.paper.event.entity;
+
+import org.bukkit.Location;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.entity.EntityEvent;
+import org.bukkit.util.Vector;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Called when an entity is launched upward by a Potent Sulfur geyser.
+ */
+@NullMarked
+public class EntityPotentSulfurLaunchEvent extends EntityEvent implements Cancellable {
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final Location sulfurLocation;
+    private final Location sourceLocation;
+
+    private Vector launchVelocity;
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public EntityPotentSulfurLaunchEvent(
+        Entity entity,
+        Location sulfurLocation,
+        Location sourceLocation,
+        Vector launchVelocity
+    ) {
+        super(entity);
+        this.sulfurLocation = sulfurLocation;
+        this.sourceLocation = sourceLocation;
+        this.launchVelocity = launchVelocity;
+    }
+
+    /**
+     * Gets the location of the Potent Sulfur block.
+     */
+    public Location getSulfurLocation() {
+        return this.sulfurLocation.clone();
+    }
+
+    /**
+     * Gets the location where the geyser exits the water column.
+     */
+    public Location getSourceLocation() {
+        return this.sourceLocation.clone();
+    }
+
+    /**
+     * Gets the velocity that will be added to the entity.
+     */
+    public Vector getLaunchVelocity() {
+        return this.launchVelocity.clone();
+    }
+
+    /**
+     * Changes the velocity that will be added to the entity.
+     */
+    public void setLaunchVelocity(Vector launchVelocity) {
+        this.launchVelocity = launchVelocity.clone();
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}
diff --git a/paper-server/patches/sources/net/minecraft/world/level/block/entity/PotentSulfurBlockEntity.java.patch b/paper-server/patches/sources/net/minecraft/world/level/block/entity/PotentSulfurBlockEntity.java.patch
new file mode 100644
index 000000000000..12deabfd88fa
--- /dev/null
+++ b/paper-server/patches/sources/net/minecraft/world/level/block/entity/PotentSulfurBlockEntity.java.patch
@@ -0,0 +1,23 @@
+--- a/net/minecraft/world/level/block/entity/PotentSulfurBlockEntity.java
++++ b/net/minecraft/world/level/block/entity/PotentSulfurBlockEntity.java
+@@ -128,7 +_,19 @@
+                     && !entityToBeLaunched.isPassenger()
+                     && !entityToBeLaunched.is(EntityTypeTags.NOT_AFFECTED_BY_GEYSERS)
+                     && entityVelocity.y < 0.3F + waterBlocks * 0.1) {
+-                    entityToBeLaunched.addDeltaMovement(new Vec3(0.0, 0.2F, 0.0));
++                    // Paper start - add EntityPotentSulfurLaunchEvent
++                    io.papermc.paper.event.entity.EntityPotentSulfurLaunchEvent event = new io.papermc.paper.event.entity.EntityPotentSulfurLaunchEvent(
++                        entityToBeLaunched.getBukkitEntity(),
++                        org.bukkit.craftbukkit.util.CraftLocation.toBukkit(pos, level.getWorld()),
++                        org.bukkit.craftbukkit.util.CraftLocation.toBukkit(sourceBlock, level.getWorld()),
++                        new org.bukkit.util.Vector(0.0, GEYSER_LAUNCH_FORCE, 0.0)
++                    );
++                    if (!event.callEvent()) {
++                        continue;
++                    }
++                    org.bukkit.util.Vector launchVelocity = event.getLaunchVelocity();
++                    entityToBeLaunched.addDeltaMovement(org.bukkit.craftbukkit.util.CraftVector.toVec3(launchVelocity));
++                    // Paper end - add EntityPotentSulfurLaunchEvent
+                     entityToBeLaunched.needsSync = true;
+                 }
+             }