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Questions tagged [earth-observation]

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8
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1answer
89 views

Seeming correlation between time of day and earthquakes

I live in a generally geographically active area (Southern California, near the San Andreas fault, if that matters), that has had two relatively minor earthquakes that I have felt in the last week (in ...
7
votes
1answer
72 views

What physical measurement / elevation is used to define Earth's radius?

Earth's radius is usually given as 6378137 meters (equatorial radius), its flattening is defined as 1/298.257223 (WGS84), and thus its polar radius is calculated as 6356752 meters. However, the ...
4
votes
1answer
564 views

Every 202,500 years, Earth wanders in a new direction; does it affect climate?

I refer to this article on nytimes.com: Every 202,500 Years, Earth Wanders in a New Direction TLDR: Scientists believe the earth's orbit oscillates between circular and more elliptical due to the ...
1
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2answers
329 views

Effects of CERN on earth's magnetic field?

CERN is a scientific site developed to create anti matter. Does this have any negative impact on the environment?
2
votes
1answer
108 views

Volcano in ocean?

Is it a volcano in this image ? The magnified version. I was browsing through earth images here when I spotted this orange thing. Is it some oceanic volcano? It may be an absurd question but is it ...
1
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0answers
49 views

How much curvature of the Earth can be seen at altitude? [duplicate]

Is there an equation that produces the amount of curvature of the Earth one should see at the altitude of x (whatever x may be)? ...
8
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4answers
2k views

What are we seeing when we see the curvature of Earth?

I don't know if this question's for here, physics, maths, or geometry. I know that this or something similar has been asked a million times, but I've recently come to the concept that since the ...
2
votes
1answer
91 views

Understanding pushbroom sensors

Does a push broom scanner scan a path perpendicular to the direction of satellite travel? I am confused because its detectors are arranged across track even though it scans along track.
0
votes
1answer
73 views

Can someone provide a map of Nazca lines with this image in it?

I found this image of a bird with another image below its right wing on google earth in nazca peru. Is there any maps or infomation available that can help me identify this one? Kind regards Jeff B.
4
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0answers
176 views

Trewartha climate classification overlap?

By my reading of the wikipedia page on the Trewartha climate classification, climate classifications are not mutually exclusive. Let's take a look at the climate classification of Iowa City, IA. The ...
3
votes
3answers
129 views

Had the climatologists predicted climate change as the deviations to both extremely cold and hot temperatures before?

Recently I read that the current extreme snowfall in northern temperate climate is caused by the increased evaporation due to the global warming. Had any scientist predicted these extremes before ...
3
votes
2answers
394 views

Climate change hoax [closed]

I see many scientific articles and newspapers out there saying that the climate change is happening. Yet, there are people who believe climate change is a hoax and a lie. But I haven't seen any '...
2
votes
1answer
2k views

What time and date is the sun directly overhead a given place on Earth?

In different regions, the sun is directly overhead at different times of the year. When do these event happen?
3
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0answers
35 views

Does the hour of the day and the position on the sun have any influences on the formation of a hurricane?

I am writing an essay and cannot find if a hurricane is influenced by the position of the sun or the hour of the day.
4
votes
1answer
105 views

Has PAZ satellite been launched?

There are several mentions in the net about Spanish radar satellite called "PAZ", which should work in tandem with German TerraSAR-X and should have been launched in 2015. But most results I can find ...
6
votes
1answer
514 views

How to locally identify a cold front passage?

I know that the passage of a cold front affects local conditions by decreasing the temperature and shifting the winds. Some precipitation could happen as well. How do software that analyze weather ...
2
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0answers
45 views

WMM and IGRF model?

I am studying about World Magnetic Model (WMM) and International Geomagnetic Reference Field (IGRF) model provides the seven parameters about the earth magnetic field. These models have to be deployed ...
2
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0answers
31 views

How can parameters of the ionosphere be calculated?

How can parameters of the ionosphere be calculated? Specifically, how do we calculate total ion density, total ion temperature and individual major ion densities from I-V Characteristics curve of ...
0
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3answers
325 views

What sort of geological features would you look for to find copper?

What sort of geological features would you look for to find this precious resource?
1
vote
1answer
64 views

Pure blue sky in Spring [closed]

I live in France. Is it true that there are more occurrences of deep blue skies during spring. If yes why ? Is it true also during autumn. Thank you for answering
3
votes
1answer
121 views

At what latitudes does daytime last exactly 24 hours once in the year?

I assume at the Solstice - a definite latitude would have exactly 24 hours of daylight. What latitudes (North and South) are these - they might vary a little with longitude?
6
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0answers
37 views

Distribution of thermometric devices on earth

In complex climate models, measurements of Earth-based thermometers are used. What is their geographic distribution - historically? Does each measurement get equal weight?
29
votes
6answers
67k views

How high must one be for the curvature of the earth to be visible to the eye?

I would like to ask that at what distance from the Earth's surface the curvature of the Earth is visible. What layer of the atmosphere is this? I've noticed that at the height of 9-12 Km (the view ...
4
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0answers
48 views

meaning of Grid resolution [duplicate]

I have some queries regarding grid. What does this mean. The grid has spatial resolution of 1/2 degrees latitude × 2/3 degrees longitude.?
3
votes
1answer
138 views

Are the magnetic elements of meteorites that have struck Earth aligned with the magnetic field?

I was just pondering this question; do meteorites containing significant magnetic metal elements displace paleomagnetism the same way that magnetic striping on the ocean floor occurs? When the ...
16
votes
6answers
5k views

How to quickly or easily prove the world is spherical?

A relative of mine has recently introduced me to the modern flat earth theory, which she believes in. Setting aside for the moment that it is ridiculous, and that sending up some balloons with cameras ...
6
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5answers
2k views

Why wouldn't the earth be “always daytime” if the “daily cycle of sunlight” was drawn full-scale?

The question is clear enough in my opinion but, I've found out that if you redraw this picture here: You'll notice that the Sun is as big as the Earth. But if you scale up the Sun to it's real size ...
9
votes
3answers
693 views

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 ...
6
votes
2answers
1k views

How would the Earth look without water in the oceans?

Has there ever been a movie, a documentary, or an image that provides a visualization of the oceans without water? I'm writing an article on geology and I thought a visual representation would be of ...
8
votes
1answer
111 views

How to measure the cycles of earth moving/rotation?

My knowledge of science is very basic, but after some research I have some knowledge, but I am still not clear with so many things regarding to this earth. I have read Laser's Measure the Earth's ...
14
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3answers
1k views

Is Earth an organism?

According to Wikipedia, "all known types of organism are capable of some degree of response to stimuli, reproduction, growth and development and self-regulation via homeostasis." Further, watching a ...
12
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0answers
56 views

Why were no interferometers launched on weather satellites between the '69-'72 IRIS-D and the 2002-onward AIRS?

As early as the late 1960s / early 1970s, Nimbus-3 carried Iris-B and Nimbus-4 carried Iris-D, both infrared spectroradiometers with a moderate spectral resolution. Subsequently, I believe it was not ...
10
votes
1answer
94 views

Why is there no High-Resolution Infrared Radiation Sounder (HIRS) on Metop-C?

The weather satellites Metop-A and Metop-B carry copies of the High-Resolution Infrared Radiation Sounder (HIRS), an instrument with a heritage back to 1975. Considering that Metop-C is part of the ...