Here's a log comparing an earth elemental's earthquake while raiding empire vs. my thunderstomp. Notice that I hit the empire healer as well. I also have a log at the village outer (outdoors) where it hit my bondmate if you need it.

An earth elemental's crush MASSACRES the Imperial Blademaster!
An earth elemental's crush MASSACRES the Imperial Blademaster!
An earth elemental brings down its foot with a tremendous stomp!
An earth elemental makes the earth tremble and shiver.
An earth elemental's earthquake MASSACRES the Imperial Blademaster!
An earth elemental's earthquake MASSACRES the Imperial Warlock!
An earth elemental's earthquake MASSACRES the Imperial Assassin!
An earth elemental's earthquake MUTILATES the Imperial Prelate!

then my thunderstomp:

You bring your foot down, shaking the ground with thundering force!
An earth elemental yells 'Help! <My char's name> stomped on my foot!'
Your earthquake EVISCERATES an earth elemental!
Your earthquake misses Massok.
The gods protect Molo.
Your earthquake decimates The Imperial Inquisitor!
Your earthquake MANGLES the Imperial Warlock!
Your earthquake MASSACRES the Imperial Assassin!
Your earthquake maims the Imperial Prelate!
The Imperial Prelate is covered with bleeding wounds.