Earthquakes and ocean tides

The quarantine section is where spambot posts, and anything that breaks the more serious rules gets moved to (such as Nazi shit, or pron).

Why was it in quarantine in the first place. Other than revealing the document Tom Bishop posted as being a fake, and not in line with the actual belief of the original author, I don’t remember there being any reference to Nazi shit, or porn.

Quote from: EvolvedMantisShrimp on May 01, 2019, 05:44:34 PM

Quote from: Tom Bishop on April 28, 2019, 05:49:48 PM

You need to provide evidence for your claims rather than make baseless appeals to authority.

Feel free to read the above sentence every time you post and forget to provide evidence for your points.

So do you.

Yeah, where's the evidence for tides being caused by the gravitation of stars as the Wiki claims?

Not the stars, a star, or to give it’s more usual name, the sun. The moon however exerts an even greater force on the earth than the sun, despite its size, because it’s much much nearer.

Not the stars, a star or to give it’s more usual name the sun. The moon however exerts an even greater force on than the sun, despite its size, because it’s much much nearer.

That's true but here's a little "paradox" for you.
The gravitational acceleration due to
     the sun at the surface of the earth is about 5.9 x 10^-3 meters/sec² and
     the moon at the surface of the earth is about 3.3 x 10^-5 meters/sec².
So the sun's gravitational acceleration at the earth's surface is about 177 times the moon's gravitational acceleration at the earth's surface.

But the sun only has 44% of the effect the moon has on tides.

Quote from: Space Cowgirl on May 01, 2019, 03:30:42 PM

The quarantine section is where spambot posts, and anything that breaks the more serious rules gets moved to (such as Nazi shit, or pron).

Why was it in quarantine in the first place. Other than revealing the document Tom Bishop posted as being a fake, and not in line with the actual belief of the original author, I don’t remember there being any reference to Nazi shit, or porn.

You're not even making sense. Is the document Tom posted still in the thread? It was quarantined by mistake. There is a thread about it in Suggestions & Concerns.

Quote from: Lonegranger on May 02, 2019, 01:45:10 AM

Not the stars, a star or to give it’s more usual name the sun. The moon however exerts an even greater force on than the sun, despite its size, because it’s much much nearer.

That's true but here's a little "paradox" for you.
The gravitational acceleration due to
     the sun at the surface of the earth is about 5.9 x 10^-3 meters/sec² and
     the moon at the surface of the earth is about 3.3 x 10^-5 meters/sec².
So the sun's gravitational acceleration at the earth's surface is about 177 times the moon's gravitational acceleration at the earth's surface.

But the sun only has 44% of the effect the moon has on tides.

Yep. That apparent paradox isn't really a paradox at all, though, and it does illustrate the nature of tides.

Quote from: Lonegranger on May 02, 2019, 01:42:28 AM

Quote from: Space Cowgirl on May 01, 2019, 03:30:42 PM

The quarantine section is where spambot posts, and anything that breaks the more serious rules gets moved to (such as Nazi shit, or pron).

Why was it in quarantine in the first place. Other than revealing the document Tom Bishop posted as being a fake, and not in line with the actual belief of the original author, I don’t remember there being any reference to Nazi shit, or porn.

You're not even making sense. Is the document Tom posted still in the thread? It was quarantined by mistake. There is a thread about it in Suggestions & Concerns.

I think what I said was quite clear, though the thread in S&G in new to me.

Quote from: Lonegranger on May 02, 2019, 01:45:10 AM

Not the stars, a star or to give it’s more usual name the sun. The moon however exerts an even greater force on than the sun, despite its size, because it’s much much nearer.

That's true but here's a little "paradox" for you.
The gravitational acceleration due to
     the sun at the surface of the earth is about 5.9 x 10^-3 meters/sec² and
     the moon at the surface of the earth is about 3.3 x 10^-5 meters/sec².
So the sun's gravitational acceleration at the earth's surface is about 177 times the moon's gravitational acceleration at the earth's surface.

But the sun only has 44% of the effect the moon has on tides.

All true, Rabinoz, but I think we can go into tides, a little "deeper". Excuse the pun.

While the moon's gravitational force is pulling water towards it, causing a high tide on one side of the globe, on the direct opposite side, there is also a high tide caused by the centrifugal force from the rotation of the Earth pulling water away from the spin axis. So, for our tidal system, we have two bulges of water being two high tides, and at 90 degrees to this, we have two low tides.

The side of earth closest to the sun also experiences the sun's gravitational force enhancing the moon's pull. At new moon every month, the sun and moon are pulling one tidal bulge in the same direction. The combined moon and sun gravity creates an extreme high tide and two extreme low tides simultaneously. At full moon, the sun and moon are opposite each other but are working together on the two opposite tidal bulges.

The average tidal bulge is about one meter high.

Topography can have an effect on the tides, as can wind and weather patterns on water level. Strong offshore winds can move water away from coastlines, exaggerating low tides, while onshore winds can push water into the shore making low tides less noticeable.

The Falls of Lora in the west of Scotland, because of the geography of the coastline, experiences tidal bulge of 4 meters.

As you all may or may no know, scientists have calculated the moon is drifting away from Earth on average of 3.78 centimetres a year. This is due to the moon speeding up. But, as the moon accelerates away from us, the earth is losing momentum and slowing down. Hence, Earth's spin, and therefore length of day, is governed by the moon.

The revelance to our tides, is the moon speeding up, is caused by earth's tidal bulge exerting a small but significant gravitational pull on the moon, causing it to move ahead in it's orbit.

Quote from: rabinoz on May 02, 2019, 03:30:29 AM

Quote from: Lonegranger on May 02, 2019, 01:45:10 AM

Not the stars, a star or to give it’s more usual name the sun. The moon however exerts an even greater force on than the sun, despite its size, because it’s much much nearer.

That's true but here's a little "paradox" for you.
The gravitational acceleration due to
     the sun at the surface of the earth is about 5.9 x 10^-3 meters/sec² and
     the moon at the surface of the earth is about 3.3 x 10^-5 meters/sec².
So the sun's gravitational acceleration at the earth's surface is about 177 times the moon's gravitational acceleration at the earth's surface.

But the sun only has 44% of the effect the moon has on tides.

All true, Rabinoz, but I think we can go into tides, a little "deeper". Excuse the pun.

While the moon's gravitational force is pulling water towards it, causing a high tide on one side of the globe, on the direct opposite side, there is also a high tide caused by the centrifugal force from the rotation of the Earth pulling water away from the spin axis. So, for our tidal system, we have two bulges of water being two high tides, and at 90 degrees to this, we have two low tides.

The side of earth closest to the sun also experiences the sun's gravitational force enhancing the moon's pull. At new moon every month, the sun and moon are pulling one tidal bulge in the same direction. The combined moon and sun gravity creates an extreme high tide and two extreme low tides simultaneously. At full moon, the sun and moon are opposite each other but are working together on the two opposite tidal bulges.

The average tidal bulge is about one meter high.

Topography can have an effect on the tides, as can wind and weather patterns on water level. Strong offshore winds can move water away from coastlines, exaggerating low tides, while onshore winds can push water into the shore making low tides less noticeable.

The Falls of Lora in the west of Scotland, because of the geography of the coastline, experiences tidal bulge of 4 meters.

As you all may or may no know, scientists have calculated the moon is drifting away from Earth on average of 3.78 centimetres a year. This is due to the moon speeding up. But, as the moon accelerates away from us, the earth is losing momentum and slowing down. Hence, Earth's spin, and therefore length of day, is governed by the moon.

The revelance to our tides, is the moon speeding up, is caused by earth's tidal bulge exerting a small but significant gravitational pull on the moon, causing it to move ahead in it's orbit.

Not that relevant to the topic but I drove past the falls of Lora last week. The bulge there is caused by the narrow entrance to Loch Etive and I think an underwater rocky shelf. I think what it demonstrates is how local conditions and topography affect the behaviour and nature of  tides. I was heading over the Connel Bridge going up to Castle Stalker then on to Glencoe. Glen Etive that ends at the head of Loch Etive was unfortunately made ‘famous’ after making an appearance in Skyfall the James Bond film. Just having a single track road along the glen makes it difficult at times to navigate with all the extra visitors many of whom are unused to driving on such narrow roads.

Quote from: rabinoz on May 02, 2019, 03:30:29 AM

Quote from: Lonegranger on May 02, 2019, 01:45:10 AM

Not the stars, a star or to give it’s more usual name the sun. The moon however exerts an even greater force on than the sun, despite its size, because it’s much much nearer.

That's true but here's a little "paradox" for you.
The gravitational acceleration due to
     the sun at the surface of the earth is about 5.9 x 10^-3 meters/sec² and
     the moon at the surface of the earth is about 3.3 x 10^-5 meters/sec².
So the sun's gravitational acceleration at the earth's surface is about 177 times the moon's gravitational acceleration at the earth's surface.

But the sun only has 44% of the effect the moon has on tides.

All true, Rabinoz, but I think we can go into tides, a little "deeper". Excuse the pun.

While the moon's gravitational force is pulling water towards it, causing a high tide on one side of the globe, on the direct opposite side, there is also a high tide caused by the centrifugal force from the rotation of the Earth pulling water away from the spin axis. So, for our tidal system, we have two bulges of water being two high tides, and at 90 degrees to this, we have two low tides.

The side of earth closest to the sun also experiences the sun's gravitational force enhancing the moon's pull. At new moon every month, the sun and moon are pulling one tidal bulge in the same direction. The combined moon and sun gravity creates an extreme high tide and two extreme low tides simultaneously. At full moon, the sun and moon are opposite each other but are working together on the two opposite tidal bulges.

This isn't a bad reference on the relative "tidal effects" of the sun and moon, HyperPhysics, Tides, the Tidal Effects of the Sun and Moon.