Earthquake

Earthquake is a Rage skill.

In-game
When invoked, creates a patch of molten fissures in the ground that remains in there (does not follow the Barbarian) and deals damage to enemies standing in it.

Runes

 * Giant's Stride: 20 secondary tremors (one every 0.4 seconds) appear beneath the Barbarian's feet, following his or her movement. Each tremor is roughly 6 yards in radius and deals 300% damage as Fire at once, disappearing immediately afterwards.
 * Chilling Earth: damage type changes to Cold and affected enemies are also Frozen for the entire duration.
 * The Mountain's Call: damage type changes to Lightning, removes the Fury cost and reduces the cooldown to 30 seconds.
 * Molten Fury: increases damage to 6000% as Fire over 8 seconds.
 * Cave-In: damage type changes to Physical, and when the Earthquake is cast, all enemies within 24 yards are pulled towards the Barbarian.

Non-rune enhancements

 * Blade of the Tribes (Legendary Two-Handed Mighty Weapon): increases damage by 600-800%, and and Threatening Shout summon an Earthquake.
 * Girdle of Giants (Legendary Mighty Belt): Seismic Slam increases Earthquake damage by 200–250% for 3 seconds.
 * Might of the Earth Set (Set Bonus for 2 items): reduces the remaining cooldown by 1 second for every 30 Fury spent.
 * Might of the Earth Set (Set Bonus for 4 items): landing after using a will also create an Earthquake, fully benefiting from runes and enhancements, if any.
 * Might of the Earth Set (Set Bonus for 6 items): increases damage by 20000%.

Passives

 * Earthen Might: Earthquake generates 30 Fury when cast (but after the normal cost, if any, is subtracted).
 * Boon of Bul-Kathos: reduces cooldown by 15 seconds.