Wrong section (again!).  How about posting this in the "Geneal LBT" section?

Are you referring to the sequels movies or the TV series JBJB1029 (indeed the thread will be moved to the according section)?
In the movies we have earthquakes, volcanoes, meteor impacts, a drought (caused by that meteor impact), floods, a tornado, a tsunami (which curiously runs from the coast towards the open sea), a plague of locusts, avalanches (both snow and rock), and fire (caused by lightning strike).

Sheesh!  Looking at all that, what could possibly be left?

There is one natural disaster that wasn't used "A Huricane."

I've found a list of Natural Disasters, heres the list:

• Land movement disasters
  • Avalanches
    
  • Earthquakes
    
  • Lahars
    
  • Landslides
    
  • Mudflows
    
  • Volcanic eruptions
    
• Water disasters
  • Floods
    
  • Limnic eruptions
    
  • Tsunamis
    
• Weather disasters
  • Blizzards
    
  • Droughts
    
  • Hailstorms
    
  • Heat waves
    
  • Cyclonic storms
    
• Fire
  
• Health and disease
  • Epidemic
    
  • Famine
    
• Space
  • Impact events
    
  • Solar flare
    

Which one's were no used in The Land Before Time (Series), and which ones can, and can't be used in The Land Before Time (Series)?

I'm quite sure there was a mud flow in one of the tv-series episodes. There was a tsunami in LBT 5 (not one with major consequences though).

There are essences of things like mudflows (open sequence of LBT 9 there is a mudslide where a tree almost falls on a Rainbowface). And hang on, there has been a hurricane scene. What about the whirling wind part of LBT 6?

So basically, the LBT series has had just about every natural disaster imaginable. Its not surprising. I think the Great Valley is just cursed.

I wouldn't go so far to say the Great Valley is cursed. From a production point of view, it is the easiest topic to implement given the nature of the series. They don't create or build items so there is no fear of them back firing or being used for evil purposes. They don't have wars or any major conflicts so that's also a write-off. Most of the conflicts and troubles that humans endeavour in films are normally self-inflicted. Natural disasters are the perfect anatagonists for an undeveloped, naturalist environment so it's no wonder the Great Valley has been hit with pretty much every one they could think of. It's the best way to add suspense and tension to the series.

OK granted it may be something different by definition but to the actual characters would it still not equate to the same thing? And to a young audience, the technical definition of a hurricane wouldn't really mean much hence why I mentioned it. Tornado, twister, hurricane...to a kid it is a destructive wind that's depicted in a spinning motion.  Given that point it is probably the reason why it wasn't used multiple times, separated by definition.

OK granted it may be something different by definition but to the actual characters would it still not equate to the same thing? And to a young audience, the technical definition of a hurricane wouldn't really mean much hence why I mentioned it. Tornado, twister, hurricane...to a kid it is a destructive wind that's depicted in a spinning motion.  Given that point it is probably the reason why it wasn't used multiple times, separated by definition.

I think they would be able to distinguish between a hurricane and a tornado/twister. A tornado/twister would be visible as a long funnel of cloud touching the ground and moving across land.

A hurricane, however, doesn't have such a thing. It's just strong wind and perhaps flooding as well. So to an LBT character, a hurricane would be a "really bad storm", not another name for a twister or tornado.

There's Been Many Disasters In The Land Before Time Movies. Disasters Like The Volcano Eruption, Tornado, Hurricane, And More. I Don't Like Those Kind Of Disasters. Because They're Nothing But Trouble. I Mean, Littlefoot And His Friends Survived, But Those Disasters Are Still Trouble.

Disasters aren't supposed to be fun.