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Questions tagged [geophysics]

For questions relating to geophysics: the study, behavior, consequences, and technologies involving the physical properties of the Earth.

13
votes
4answers
337 views

Can a liquid sand ocean exist naturally?

I'm talking about this sort of liquid sand: https://www.youtube.com/watch?v=My4RA5I0FKs "Desert-as-sea-analog" is present in many media, but often they lean heavily into fantasy, and it seems not ...
1
vote
3answers
103 views

What Else Could Create Jeffrey Linn's Coastlines BESIDES The Influence of Ice? [closed]

Who? Unfortunately, I could not find any background information about Jeffrey Linn, but he is better known for his sea level maps. Specifically, what a particular city would look like if sea levels ...
0
votes
5answers
110 views

How Can the Coastlines Look Similar In Spite of the Cooler Temperature

The established fact is that the shape of a planet's continental coastlines is determined by the planet's climate. Higher temperatures mean less ice, which ultimately means higher sea levels. (Case ...
2
votes
1answer
102 views

Earth tilt changes due to space launches

How many rocket launches are needed to change the axial tilt of the Earth so much that it is noticeable with instruments available today? We can assume that we are talking about the heaviest rocket ...
1
vote
1answer
58 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 ...
3
votes
6answers
326 views

Creating flying cities

Writing about suspended cities within a planet's atmosphere! The story itself focuses on the air forces that fight for each of the hundreds of floating city states living in the sky, but that's here ...
3
votes
1answer
243 views

Any potential problems with the density of a planet with a volume 8 times that of Earth but the same surface gravity as Earth?

Assuming that there is an Earth-like planet that has 8 times the volume, 2.83 times the radius, and has the same surface gravity as Earth, and has oceans; what are potential problems concerning the ...
3
votes
1answer
80 views

Oceanic crust formation

I'm working on a earth-like planet with a much lower sea level (like 3000m so the mid-ocean ridge would form many islands) but is that even possible? Will the emerged ridge make some weird stuff and ...
5
votes
2answers
134 views

How might the cooling of the Earth's core be accelerated?

Essentially, what would be the most efficient way of causing the Earth's core to cool as much as possible without damaging human civilization in any other way (the outcome can damage it, but not the ...
-1
votes
1answer
152 views

Could a natural satellite in geosynchronous orbit be used as a counterweight to a space elevator?

Could a natural satellite in geosynchronous orbit be used as a counterweight for a space elevator? Does the counterweight need to be of approximately the same weight as the anchor? If so, I suppose ...
1
vote
3answers
158 views

Lifting water from a subterranean lake by boiling it?

A medieval-tech desert city relies on a nearby subterranean lake for their water source. In lieu of employing thousands of slaves carrying pots up a long series of tunnels, could the intrepid desert ...
8
votes
3answers
657 views

Is an offset mountain range plausible?

For my world, I would like a coastal mountain range that partway along its length is offset by a few (say, 100) kilometres, forming a pass through the mountains, like so: (N.B. I've drawn this very ...
0
votes
2answers
135 views

Could there be a plausible description for a kind of radioactive ore that can amplify the energy of a host or object, or potentially destroy it? [closed]

This kind of ore should be rare (maybe from meteorites?), dangerous (radioactive?), but potentially very useful in a world where people have augmented abilities, cybernetic attachments, that sort of ...
6
votes
4answers
806 views

Can a dual planet have an orbit around the Sun similar to Earth's?

This is a sequel to my previous question How big could a moon be before its orbit became too unstable or tidally locked to its planet OK, let's imagine that the thing everyone thought was a moon was ...