Questions tagged [natural-disasters]

For questions about naturally occurring phenomena that cause damage and threat to a sentient being, e.g. tornadoes, earthquakes, meteors, etc.

Filter by
Sorted by
Tagged with
3
votes
2answers
110 views

How can energy seeping into reality be prevented from spreading?

Our reality is separated from the realm of chaos by a thin barrier that prevents either realm's inhabitants from interacting. The exception is during an event which occurs every 1000 years. In this ...
5
votes
6answers
335 views

Blowing fragments of the moon off, sending them to Earth as meteors - what is the impact? [closed]

Pun not (originally) intended. In my story, a fairly advanced, newly space-faring civilisation manages to land on the moon and establish a colony, where they do some industrial work e.g. mining. ...
1
vote
1answer
86 views

Are large meteor craters possible with the survival of most human society?

In my world, I am looking for a crater formed by a meteor impact that deposited a large number of resources there. The final crater should be 200 miles in diameter. I would like to do this with ...
-2
votes
3answers
164 views

Who is likely to die because of a prolonged power outage? How long does it take?

My antagonist is going to cause a widespread blackout to flex on the protagonist, but the unexpected consequence is that some folks are going to die as a result. This will cause the protagonist to ...
4
votes
4answers
150 views

What do you call a society after it collapses to a certain degree? [closed]

I've been thinking about phrases like "a post-apocalyptic society", "a stone-age society", "bombed back to the stone age", etc. I've also been wondering how these terms apply to First World, Second ...
1
vote
3answers
101 views

Attempting to Cripple Society while Preserving Biosphere

Asking for a project that's floated in and out of my head for the past few years. I'm desiring to create a scenario where human society is globally affected - not wiped out, not even Mad-Maxed, but ...
2
votes
2answers
181 views

How to evacuate an entire planet?

Setting: An Earth-like planet except all the continents are joined together like Pangea. The locals are in the medieval era and have the ability to use magic. Magic can level buildings at best, ...
2
votes
2answers
143 views

Can Florida become an island?

I've been building a world set in the near future (decades/centuries) that includes Florida as an island. My intent was for a manmade or natural event to occur at or near the South Georgia Rift, but I ...
4
votes
3answers
130 views

What Kind of Bolide Would Chicxulub Be to Create the Bigger Airburst--Asteroid or Comet?

66 million years ago, something brought an end to the long-established dinosaur empire. The pendulum just kept shifting between an asteroid and a comet, astronomical bolides that actually have ...
3
votes
1answer
159 views

Floor is lava, need answer

Imagine a tsunami of lava has flash-flooded cities. Oddly enough there weren't eruptions or earthquakes, just a sea of molten rock covering every inch of road, street pavement, what have you. ...
4
votes
3answers
758 views

Is there any way for humanity to cope with perpetual acid rains?

All of a sudden, overnight, abruptly, weather forecast guys go on strikes... everywhere is raining nitric acid non stop so that on average the amount reported is 100mm and the pH level is 3 ...
0
votes
2answers
132 views

What would we need to have 1km deep fissures spanning out across the planet?

Art by Sylvain sarrailh What kind of event would we need to have 1km deep fissures spanning out across the planet. I can work with a hypothetical scenario where the planet might have had some sort ...
11
votes
4answers
3k views

What would be the effect(s) of this asteroid?

"At this very moment we face a threat insurmountable to Man. We are faced with two options. Stay on Earth and die, or leave Earth to space." - UN Preservation Council, CE 2047 Earth, year CE 2047 An ...
2
votes
2answers
127 views

How long until land life can return after the impact?

So, it finally happened. The Earth was hit by a comet, and anyone outside of a research station at the bottom of the Atlantic is now dead, or dying. So, here's what we need to know: How big would a ...
33
votes
24answers
11k views

What would make the internet go away?

Assume that we're in roughly our currently timeline in present day, plus or minus 5 years (for increase or decrease in technology that would/could make a specific method plausible): what event or ...
-2
votes
4answers
336 views

The moon will fall to earth in 100 years, how fast is the asteroid that knocked it down?

We have at most 100 years to abandon earth. The 10-km asteroid which killed the dinosaurs has hit the moon head-on instead. As a result, the moon has slowed down and it’s orbit will decay by 400,000 ...
8
votes
2answers
340 views

What would an asteroid impact feel like to someone standing on the moon?

On the Earth, with our atmosphere, even small objects entering the atmosphere such as Tunguska or Chelyabinsk can do devastating damage due to the shock-wave travelling through the air. People could ...
6
votes
3answers
182 views

Can Shade Balls be used to stop hurricanes?

I think it would make sense for hurricanes to be combatted using shade balls to block the evaporation of the ocean into the storm. What would we need to stop a hurricane? Info on shade balls.
5
votes
8answers
339 views

What disaster could wipe out civilisation worldwide, but allow for immediate rebuilding? What would be the side effects?

For a story I have, modern civilisation must be destroyed by a worldwide disaster. The objective is roughly something that: Could be man-made or aided (if not now, maybe in the future) Decimates, ...
6
votes
3answers
124 views

What is the longest plausible interval for a recurring, society-shaping, natural distaster?

I'm writing a story in which the characters (and society at large) have to deal with a recurring natural disaster (like hurricane season or the common winter, in a way). What I want to know is how ...
4
votes
5answers
317 views

Can We Prevent an Impact Winter Extinction with Modern Technology?

I was certain somebody would have asked this before, but after scrolling through the Similar questions list I couldn't find any duplicates. For this question, let's say that an asteroid or comet ...
2
votes
1answer
182 views

How big would an asteroid have to be to destroy 99.9% of the human population? How would the remaining survive? [closed]

Let's say that a mega-asteroid is heading towards Earth. I want it to destroy essentially the entire population except maybe a few million people around the world. Now, I know that for an asteroid of ...
4
votes
3answers
260 views

What would it look like if a portal opened to a dimension with drastically less energy?

Imagine the other dimension is much much colder. Very little light/heat/etc. Suppose the portal only allows energy transfer, so matter can't pass through. What would the consequences be? Would it ...
1
vote
5answers
435 views

Can we move the moon to use as a shield?

Do we have the capability of moving the Moon just a little bit to time a intercept with a moon size asteroid like the one in the picture? It just said that if we could intercept an asteroid far out ...
4
votes
2answers
248 views

A Dozen Cubic Miles of Volcanic Ash--How Big Would the Cloud Be?

On May 18, 1980, Mount Saint Helens made American history with an eruption that took 57 human lives and killed thousands of animals. It has released only a quarter of a cubic mile of ash, but it is ...
6
votes
11answers
513 views

What type of natural or artificial disaster could devastate a multi galactic civilization?

There is an advanced civilization that spans multiple galaxies. The civilization has learned to tap every available source of energy within the volume that it has colonized. The civilization ...
1
vote
5answers
215 views

A fast apocalypse with survivors, but very low chance of rebuilding [closed]

I need an event which could make the world go from "similar to today" to post-apocalyptic in one lifetime, preferably in 20-40 years. It needs to happen fast, because I want to focus the story on ...
10
votes
10answers
3k views

How to transport 10,000 terrestrial trolls across ocean fast?

Trolls are about 30 meters tall on average and can weigh anything between 100 to 200 short tons at sea level. They can only be found to inhabit an island somewhere in the Pacific ocean and are in ...
2
votes
2answers
127 views

High-Altitude Asteroid Impact

66 million years ago, the dinosaur empire was in its death throes when its final nail in the coffin came hurtling down from the sky. A clump of rock the size of Mount Everest smashed into the Gulf of ...
7
votes
4answers
373 views

Can reckless idiots wake up a dormant volcano using mining equipment?

My story for a video game has some kind of "enemy" (think "the Others" from Lost—little is known about them; they have control over a small settlement or two and appear to be engaging in some manner ...
3
votes
2answers
146 views

Human caused disasters creating a whole new continent

So my world needs to be destroyed because of a variety of things. New land masses would be created and destroyed and joined till we had a single continent. In the future, people saw the possibility ...
1
vote
1answer
70 views

How would constant rhythmic tsunamis affect the coast lines of the Atlantic Ocean?

Premise: a massive organic structure sits somewhere in the Atlantic Ocean giving of an intermittent telekinetic pulse. This would presumably create a constant chain of tsunamis. What sort of abnormal ...
5
votes
5answers
2k views

What natural event could strip all of Earth atmosphere?

I was reading up on Mars thin atmosphere and was wondering how could Earth becomes like the red planet except it only has only 100 pascal (air pressure) at imaginary sea level? Mars is 600 pascal on ...
9
votes
5answers
2k views

How possible would it be for a whole city (and smaller towns) to be built on water?

The world is flooded and some people have survived and managed to build small towns and even massive cities on the ocean that now covers the world. Is this possible hypothetically? How much of the ...
1
vote
2answers
322 views

How long would it take for an Earth-like planet to flood?

In my story, the heroes are trying to prevent a global flood and I need to know how long would it take for constant rainfall to flood an Earth-like planet so that the only things left are the tips of ...
7
votes
5answers
519 views

How to wipe out ALL life on Earth, but leave it habitable?

NB: This is not a duplicate of this question, because A) it only asks to wipe out humans, not any other life-form, and B) it insists that one person must survive. The survival of anything is not ...
-2
votes
1answer
69 views

Planet Size Disaster [closed]

What kind of disaster could be large enough to wipe out an entire planets life and leave it like a complete wasteland, similar environment to what Mars is? Nuclear warfare or meteors are what I have ...
14
votes
13answers
4k views

What could explain why trees only have 12 rings?

A colony of space travelers makes their way to their new home planet. After landing and establishing their base camp, a wood worker begins to cut down trees and notices that none of the trees have ...
4
votes
8answers
810 views

Extinction Equilibrium: 50%

The last time I asked a worldbuilding extinction question, I asked on what sorts of factors would create an extinction event in which 96% of all terrestrial species and only 70% of marine species died ...
9
votes
8answers
1k views

To Conquer the Earth by Appearing Ship

An alien species has been conquering planet after planet around the Milky Way for some time. They detected intelligent life on Earth a while back and now they decided it’s time to add us to their ...
13
votes
5answers
891 views

An Inverse Great Dying

252 million years ago, the worst event in the history of life on Earth occurred. 70% of all terrestrial species and 96% of all marine species became extinct through, according to geological records, ...
9
votes
4answers
673 views

Can I trigger supernova artificially?

As far as I know stars are going supernova as a natural process. Can aliens trigger it artificially? If this is possible then: How can I do this (what minimum technology and civilization development ...
2
votes
5answers
269 views

Effects of asteroid passing very close to the planet

I am trying to think of a natural event that causes very big impact to human lives - massive movements of people, shift of power, etc. This event happens in a medieval period on an earth-like planet. ...
9
votes
5answers
571 views

Could a nuclear explosion occur naturally on a planet with crazy enough (but still possible) conditions?

My question here is if there is any circumstance, however unlikely, that could lead to explosive nuclear fission that was not set off by intelligent creatures. I'm working on some bizarre planets for ...
52
votes
32answers
20k views

How to completely destroy a city, without leaving clues for humanity 4,000 years later?

Background I want to burn down a city completely. Nothing must remain, ashes to ashes, dust to dust. Even though I'm a supernatural being, I want this to happen in a natural way. I also want the ...
1
vote
1answer
114 views

If there were giant irregular mirrors above cities that would reflect sunlight, would that heat the atmosphere and cause global warming? [closed]

Or would the heat dissipate back into space? For my world building purposes, I need it to cause global warming, I just don't really know if it would work. Maybe the cities would need to be bigger then ...
3
votes
3answers
281 views

Likely warning time for extinction event asteroid

I'm looking for a science based answer based on current technology. Given that we do commit some small amount of resources and time to searching for stellar objects, with our current technology, how ...
0
votes
1answer
447 views

Do different angles of strike affect the destructive power of an asteroid?

I'm looking into the destructive power of a 5km asteroid strike, a bit smaller than the k-Pg event. How does the angle of the strike affect the destructive capability of a land-based impact. For ...
9
votes
4answers
527 views

What kind of natural disaster could create a permanent, global cloud cover?

“Permanent” here meaning “significant over geological timespans”, so it would have to last at least 10,000 years and produce a thick enough layer of clouds that it would cover the entire planet in an ...
12
votes
8answers
1k views

Would an asteroid of similar size to the one that hit 65 million years ago cause humans to go extinct?

Could humans sustain life after a k-t like extinction event? I know that a long lasting winter was a side effect then, but humans have technology to protect against cold. What other effects of an ...