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Questions tagged [earth-rotation]

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11 votes
2 answers

Was the filling of the Three Gorges Dam's impact on the Earth's rotation rate detectable?

I'm a big fan of Vsauce and the video How Earth Moves is just one example of science related to the Earth available there (there's plenty more). But the statement in this video starting at ...
uhoh's user avatar
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14 votes
2 answers

Effect on sea level if the Earth stopped rotating

Would sea level change at the equator if the Earth stopped spinning? I am assuming it is currently bulging around it due to centrifugal force.
Mazura's user avatar
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13 votes
1 answer

Climate on an Earth without an Axial Tilt

The Premise The Earth rotates on its own axis, which is tilted by about 23 degrees. I am imagining a situation where such an axial tilt does not exist. From general reading, it appears the largest ...
Ambarish Sathianathan's user avatar
4 votes
1 answer

What would be the depth variation of a "water ellipsoid" above a reference ellipsoid Earth?

The question If the Earth was a smooth spheroid how deep would be the ocean? has an excellent answer which explains the shape and surface area of an oblate spheroid before calculating the average ...
uhoh's user avatar
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4 votes
1 answer

What (if anything) can be learned from accurately recording tilt motion during seismic events?

The Rotational Motions in Seismology (ROMY) instrument is a giant laser gyroscope used to generate extremely precise 3D rotation measurements of planet Earth. However at the end of the video below ...
uhoh's user avatar
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20 votes
4 answers

Will the Earth ever stop rotating?

It is well known that the Earth's rotation is slowing down and that millions of years ago there was a point in time where there was only a mere 20 hours in a day on Earth. My question is in two parts....
Kenshin's user avatar
  • 7,596
17 votes
2 answers

What geophysical events can (temporarily) increase the Earth's rate of rotation?

My understanding is that the dominant factor behind the slowing of the Earth's rotation (i.e. the lengthening of the day) is tidal friction induced by the Moon's gravity. As seen on the graph below, ...
senshin's user avatar
  • 1,885
12 votes
2 answers

Is it true that distance between earth and sun is closer in winter season (January) and farther in summer season in the Northern Hemisphere?

Recently I heard that in winter season the distance between the Earth and the Sun will be closest and it is farthest in summer. If it is true then why is it hotter in summer and cooler in winter?
Hari-pacific's user avatar
12 votes
1 answer

What is the fastest the Earth has ever spun?

How fast can the Earth rotate and support life? In prehistoric times, dinosaurs were so massive that archeologists wonder how they were not crushed under their own weight. Could a faster spinning ...
Muze's user avatar
  • 1
9 votes
2 answers

Does the geographic North Pole move?

The magnetic North (or South) Pole moves due to activities in the inner of Earth. And earthquakes can tilt the Earth's orientation a tiny bit. But can and does the axis' orientation relative to the ...
LocalFluff's user avatar
9 votes
1 answer

Changes in Earth's orbital and rotation speeds

What are the Earth's maximum and minimum orbital speeds around the Sun? Is there any way to calculate orbital speed at any point of Earth's orbit? Is there a way to relate this to the calendar? Does ...
PSA's user avatar
  • 93
9 votes
3 answers

Why is this "independently reproducible proof of non-curvature" wrong?

I'm currently having a (possibly useless) argument with somebody over the internet who is adamantly claiming that the Earth is flat. I know that this person could just be pulling my leg or trying to ...
ChipperNickel's user avatar
3 votes
1 answer

How much do tides affect earth's rotational velocity?

Many of us are familiar with an exaggerated picture of the Moon's effect on Earth's tides: Since the Earth is not uniformly covered with water, however, I imagine that the tidal effect will depend on ...
Ben Sandeen's user avatar
1 vote
0 answers

Can changing magnetic fields or a solidifying core cause the Earth to rotate faster?

I had a small quarrel about this on the physics site. A question was asked about what could cause a change in the rotation speed of the Earth. In addition to the answers given I proposed the ...
Deschele Schilder's user avatar
0 votes
1 answer

Which are the equations needed to calculate how much moving Earth's water with dams would change Earth's rotation speed? [duplicate]

According to this article Drops of Jupiter Raising 39 trillion kilograms of water 175 meters above sea level will increase the Earth’s moment of inertia, and thus slow its rotation. However, ...
Pablo's user avatar
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