This is any device that is designed to cause some sort of seismic event. Usually, an earthquake.

Almost every MadScientist has at least one of these in his blueprint library, sometimes even two. Sometimes simply called the Earthquake Machine, or the Quicksand Generator, Liquefaction Array, or even Ruin Device. If it does the two things that all earthquake machines have in common, it will: 1) cause earthquakes as its primary function, 2) [[CaptainObvious probably be a machine.]]

A modernized, although not necessarily more realistic take will probably depict such a machine as a KillSat or something along these lines. This is derived from [[UsefulNotes/ConspiracyTheories conspiracy theories]] concerning [[http://en.wikipedia.org/wiki/HAARP HAARP]], some of which accuse the project of producing earthquakes for whichever nefarious purpose the NWO might have for them at the moment.

Occasionally overlaps with ThisIsADrill. While a ColonyDrop might cause an earthquake, and might very well involve a machine, the earthquake is simply a by-product of, well, a dropping colony.

The traditional depiction is verging on ForgottenTrope; the jury is out whether the reimagined version makes it a CyclicTrope.
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!!Examples

* Was one in Manga/KamikazeKaitouJeanne
* [[Wiki/SCPFoundation SCP]]-[[http://www.scp-wiki.net/scp-219 219]]. Actually can shake anything, not just earth.
* ''Anime/LupinIII''
** ''Anime/LupinIIIRedJacket'' had one being used to hold Italy for ransom.
** ''Anime/TheMysteryOfMamo'' achieved the effect by setting off nuclear generators/missiles.
* ''VideoGame/FinalFantasyXIII'' [[GenkiGirl Vanille's]] LimitBreak counts as this, as a heroic example. Alexander also uses this as a special ability, via GroundPound.
* [[VideoGame/NoMoreHeroes Letz Shake's]] weapon of choice.
* The DESTINY superweapon from ''Film/TheCore''.
* Does [[Franchise/TransformersGenerationOne G1 Rumble]] count?
* [[WesternAnimation/LiloAndStitchTheSeries Experiment #513 (named Richter)]] is a living example. He is designed to create earthquakes by slamming his tail at the ground.
* UsefulNotes/NikolaTesla claimed to have built one, but when it was tested on ''Series/{{Mythbusters}}'' it failed to create an earthquake, although it was able to sustain some significant vibrations.
* Hydrogen Bombs do this, particularly when someone buries them. Though one air detonated bomb, the Tsar Bomba, explosion was so big that it could be FELT anywhere and everywhere. Strangely though despite the wide swath of earth that is shook by an underground blast, there is little damage that is earthquake related.
* In an episode of ''[[WesternAnimation/LooneyTunes Road Runner]]'', Wile E. Coyote makes the Road Runner eat the earthquake ''pills''. But, of course, he forgot to ReadTheFinePrint on the pill bottle.
* The absolute first appearance of SelfDemonstrating/LexLuthor (Then only known as Luthor) in the [[TheGoldenAge Golden Age of Comic Books]] ''Franchise/{{Superman}}'' comics involved Luthor stealing one of these.
* PC mecha-sim game {{VideoGame/Starsiege}} had these in one mission on Mars. Known as 'Hammertanks' or 'Thumpers,' these were modified drilling platforms designed to shake [[HumongousMecha [=HERCs=]]] right off their feet. Seeing as how [=HERCs=] are apparently destroyed the moment they fall over, these tanks were extremely useful in their single appearance.
* In ''Literature/BlueMoonRising'', one of the three {{Infinity Plus One Sword}}s, Rockbreaker, was one of these.
* The [[WesternAnimation/TeenageMutantNinjaTurtles1987 Techno]][[BaseOnWheels drome]] has one built-in.
* In Literature/MacdonaldHall 's ''The War With Mr. Wizzle,'' Elmer conveniently has a minor earthquake machine built, which the guys sneak into Wizzle's home and then convince him the home is built on a minor faultline.
* In ''[[Film/OceansEleven Ocean's Thirteen]]'', the crew uses a [[ThisIsADrill tunnel drill]] to simulate an earthquake hitting Las Vegas (specifically the Bank casino) in order to get everyone out of the building (to prevent people from losing the money they just won). However, the building continues to shake even after the drill stops working. In a deleted scene, [[Creator/EddieIzzard Roman Nagel]] suggests to Livingston Dell the possibility of the fake earthquake causing a real one.
* Dr. Wily used one in the ''WesternAnimation/MegaMan'' cartoon.
* The ''{{Franchise/Superman}}'' cartoon ''Electric Earthquake'' has one-- created by a Native American MadScientist who wants to reclaim Manhattan for his people, believing it was taken by fraud.
* One of the Sennins in HoushinEngi has this as her [[WeaponOfChoice Paopei]]. Although it had great destruction potential, her ally rightly points out that it's not a weapon of precision and hitting a single, nimble human-sized target is a tall order, even for a person of her skills.
* In the ''Series/DoctorWho'' story "The Enemy of the World" the eponymous dictator Salamander's evil scheme involves causing earthquakes in territories that oppose him.
* In the sequel to ''Film/UnderSiege'' StevenSeagal's character has to deal with the bad guys who have got their hands on the controls for just such a KillSat.
* In ''Film/ConspiracyTheory'' MelGibson's conspiracy theorist character stumbles upon a conspiracy to kill the American president through an artificially induced earthquake. The machine is not described, but it's apparently fired from aboard a space shuttle.
* This causes the Undertaking in ''Series/{{Arrow}}.
* ''ComicBook/MortadeloYFilemon'': In ''Desastre'', a MadScientist threats cities using several types of {{Doomsday Device}}, the last one causing earthquakes and threatening the heroes' own city.
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