Questions tagged [earth-rotation]

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If I stood on the equator and threw a stone in direction of rotation, how much farther would the stone go than if I threw it the other direction?

Assuming a spinning Earth of 6378.1 km (3963 mi) radius, how much farther would the additional momentum carry a stone if I threw it in the direction of the Earth's rotation (i.e. eastwards) when ...
3 votes
1 answer
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Are there any types of winds or waves that are produced just by Earth's rotation?

Are there any types of wind or waves caused and produced only and exclusively by Earth's rotation? Not influenced by Earth rotation, but produced solely by it? In the case of waves, are Rossby waves 1 ...
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All longitudes experience the midday Sun. Why do all longituted experience the Midday sun?

Why do all longitudes experience the Midday sun? Any other information related will do. What is the Midday Sun? Any other earth or planet-related information is required. Thank you to those who have ...
1 vote
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Would obliquity and precessional changes of Earth affect the accuracy of GPS-based measurement of tectonic movements?

The rate and direction of tectonic movements can be measured by comparing the coordinates of the same GPS receiver over time. The coordinates are obtained using trilateration. All materials I could ...
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In the northern hemisphere summer, why are places in the north cooler than those in the south?

As the Earth's axis is inclined, during summer in the northern hemisphere places in the north are exposed to the Sun's rays for longer, so days are longer during summer (say in June - Aug). Yet, ...
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We know that the earth is rotating from west to east.Has the earth ever rotated from east to west in past,or any possibilty it may in future? [closed]

We know that the earth is rotating from west to east (anti-clockwise) Has the earth ever rotated from east to west in past,in early times after earth has formed? And/or is there any scientific ...
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If all liquid stuff inside the Earth turned solid, what would be the effect?

There are parts inside the Earth (near the core) that are liquid. Presumably causing the Earth's magnetic field (though there are celestial bodies that are completely solid while they have a magnetic ...
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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 ...
5 votes
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Did the Three Gorges Dam shift the North Pole by 2 cm?

Numerous sources repeat that, apart from slowing down the rotation of the globe, the Three Gorges Dam caused the geographic pole to shift by 2 cm. For example: https://blog.prv-engineering.co.uk/...
5 votes
2 answers
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What effect does climate change have on the Earth's rotation?

I recently read a blog entry from a leap-second expert explaining that in near term (i.e. last 3 years) the Earth has been spinning ever so slightly faster, delaying the need to insert a leap-second (...
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Does the Sun and Moon basically appear to "move on the sky" identically regardless of location and date? [closed]

For a long time, I've been trying to use Stellarium (simulation) and many visualizations and animations in order to get a good idea of how the Sun and Moon move across the sky, as seen by a human from ...
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How does rotating water affect turbulence?

I have been doing some DIYnamics with rotating water and non-rotating water. So I had a bucket filled with water on a rotating table, and waited for it to be in solid body rotation. I then dropped ...
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1 answer
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Why does Meteorology rely on a spherical model of the earth, rather than a flat earth, to function? [closed]

I hear all the arguments one explains to a flat earther as to why the earth is Spherical and not flat. I am not a meteorologist, but I know enough Meteorology for me to fly safely as a pilot. Getting ...
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1 answer
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Stop earth rotation around its axis [closed]

I have a theoretical question. I have been reading on what would happen if the earth suddenly stopped rotating around its axis, and I have learned that would result in the annihilation of all life on ...
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Query about inclination in Earth's axis of rotation

Earth revolves around the Sun in a elliptical path, situated on one of the Sun's focal points. If Earth is considered as a large body with mass attracted towards the Sun's core causing its revolution ...
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2 answers
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Do Earth's layers move at different speeds?

I don't have a background in Geology but this question popped in my head the other day and can't find an answer anywhere else. If I remember science class correctly, Earth's layers have different ...
6 votes
2 answers
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Time standard for IERS Bulletin A

IERS Bulletin A and Bulletin B contains Earth orientation parameters. These include the time difference between UT1 and UTC and pole position. The values for these parameters are listed once per day, ...
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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, ...
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Why is it still day in Mumbai at 6:47 PM?

I captured this news channel picture on Sept 11 2018 from India. We can clear see It is live telecast from Mumbai, but it is still day time.
2 votes
2 answers
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Flight time differences between flying east and flying west

Why is it that flying west takes longer than flying east despite the fact that the Earth is rotating eastward around its own axis? I had always thought flying west would take shorter than flying east ...
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What is the angle between earth's axis of rotation and equator? Are they perpendicular or at 66 1/2 Degrees?

By rotational axis I mean axial tilt or Axial obliquity or 66 1/2 degrees tilt of earth to its orbital.
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1 answer
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Is moonlight a significant condition for making life possible on earth?

We know of course that light from the sun is a fundamental component to making life possible on earth because of the energy it provides. Does the light that is reflected off of the moon make a ...
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What would happen to the Subtropical Ridge/Horse latitudes and Polar front if the Earth was rotating 5% faster?

Would they move towards the Equator/Poles? Stay in the same place? What about if the Earth was rotating 10% slower? Is there a rotation speed for Earth which will lead to 4 wind belts instead of 3 ?
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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 ...
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1 answer
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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 ...
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1 answer
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How much of one day can be considered nighttime, on average?

What is the split between night and day on Earth on average? To further clarify, assume we are on the equator, I want to know how long a time, as a percentage, you could consider to be nighttime on ...
1 vote
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Earth revolve Around the sun. [closed]

Why earth revolve around the sun in oval axis. Why not in round axis? If the gravitational force of the sun is same at every place .
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2 answers
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why we don't have solar eclipse every month?

The moon takes about a month to orbit around the Earth. So why we don't have solar eclipse every month?
3 votes
1 answer
371 views

Calculating Solar Noon from Sunrise and Sunset [closed]

I've seen the solar noon formula described as snoon = 720 – 4*longitude – eqtime. I'm curious if it is equally reliable within a relatively small margin of error (+-...
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1 answer
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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 ...
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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 ...
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2 answers
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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 ...
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Why in different places seems directions are changed? [closed]

I'm living at place A I traveled to B and I seen like sun isn't set as in place A. Like directions are changed. Where east is in place B is north of A and south of A is west of B. Because of sun ...
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19 votes
3 answers
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Why clouds are not moving in NASA's video of the Moon passing in front of the Earth?

I recently saw a short video from NASA. It shows the moon passing by the Earth as it rotates. NASA link: From a Million Miles Away, NASA Camera Shows Moon Crossing Face of Earth. The video itself ...
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What is this time zone called? [closed]

There is Greenwich Mean Time (GMT) and British Summer Time (BST). One is used in the United Kingdom (UK) in the winter, and the other in summer. Is there a three letter abbreviation for the time zone ...
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1 answer
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Is it coincidence that Antarctica is centered on the south pole?

Looking at a globe, Antarctica looks remarkably centered on the south pole. Has the rotation of the earth had any effect on the position of the landmass?
2 votes
2 answers
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Terrestrial Day vs. Venusian Day: Why the Huge Time Difference?

The diameters of Venus (7,520.8 miles) and Earth (7,917.5 miles) are comparable, but the disparity of the length of the day for each planet - as expressed in terrestrial hours - is enormous; a day on ...
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Latitude and Daylight Hours

What is the relationship between the latitude and daylight hours for each season? When I interpret the answer for the question, I believe the number of daylight hours decreases as the latitude ...
9 votes
1 answer
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How fast does the Earth's inner-core spin?

How fast does the Earth's inner-core rotate compared to the Earth's daily rotation? The inner core is always described as a spinning/rotating solid core while the Earth has a single revolution per ...
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Are the length of seasons the same globally?

Is the length of time, say months, for each season the same all over the world or can it vary?
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Can Coriolis Effect cancel itself?

Say a plane moves from 40° North to 40° South, and the plane flies in straight line without considering the Coriolis effect. Will it still reach the destination. All I mean is whether the deflection ...
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4 votes
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Is daylight time symmetrical between northern and southern hemisphere?

At lat +50.0 on Jun 21 and lat -50.0 on Dec 21 is the time between sunrise and sunset exactly the same? And so on throughout the parallels and the days of the year? If not can you explain why? I ...
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What would be the impact on tides if the earth had no tilt?

I would like to know what would be the impacts/effects on the tides if earth were to have no tilt (perpendicular to plane of ecliptic)?
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Transform Boundary and its relation with Earth's rotation

I have read about all 3 types of boundaries in the book : "Essentials of Geography" by Lutgens et. al. But there is nothing mentioned about Transform Boundary and Earth's rotation effect on it. I ...
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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 ...
8 votes
2 answers
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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 ...
8 votes
4 answers
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Why do we say Earth rotates from west to east?

It is said that Earth rotates from west to east. I take this as Earth's western hemisphere moves towards the Eastern hemisphere when seen from the frame of reference of pole star. Now I can also ...
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Wobbly Tire Theory -- Is there an existing theory that fits the following description?

I am not an earth scientist but for many years I have wondered about the following. I am curious if this has already been explored by scientists? If so, what is the theory formally called? and what is ...
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Altering the Milankovitch Cycles [closed]

As I understand it, the Pleistocene ice ages were dictated by three major factors suggested by the Serbian geophysicist Milutin Milankovitch--eccentricity (orbital shape), obliquity (axial tilt) and ...
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The apparent path of the sun

An American College Test sample question asks: Based on the shadow directions in these experiments, which of the following best describes the difference between the apparent path of the Sun as seen ...
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