@Mew Dr. Song and Dr. Richards studied seismic waves from 38 earthquakes that occurred between 1967 and 1995 near the South Sandwich Islands at the bottom of the globe. They measured the speed of waves that traveled up through the inner core to receiving seismographs in Alaska at the top of the globe and found that the waves arrived about 0.3 seconds sooner in the 1990s than they did in the 1960s.
The speed of the waves steadily increased over the period because the inner core's "fast axis" -- the fastest possible route through the inner core -- was gradually becoming more closely aligned …
@Mew for the second part: he Earth's core was formed very early in Earth's history as heavier molten iron sank toward the center of the planet. As the Earth cooled and dissipated its internal heat toward the surface, some molten iron began to solidify to create the dense, solid inner core at the center of the planet. Enormous pressure keeps the inner core solid in a region of temperatures in the range of 7,000 degrees Fahrenheit and possibly much higher.
Fluid iron in the outer core has continued to solidify at the boundary between the two cores, so that over a billion years, the inner co…
only 8 questions were asked over 24 hours if you exclude mine
the number of questions per day has been decreasing since there was a crackdown on the standard of questions
we want to ask expert questions, but the experts here aren't asking questions, so therefore we will have nothing if we really stop asking basic questions and the site will fail
There have been some discussions as to whether we want to be a site for experts, or a site for all.
There have also been discussions if some questions are too basic.
Are those two discussions essentially the same, or is there some difference between them? Can an expert question be basic? Can ...
Most of us know about the Dust Bowl, the huge storms of dirt and dust that swept across America in the 1930s, but what I'm wondering is:
What actually triggered the start of the Dust Bowl?
Is it very likely that it will occur again?
What are some good textbooks and online resources for learning about geophysics? That is, physics, as it relates to the earth's geology, shape, and internal structure.
It is well known that the jet stream follows an overall meandering pattern, but what is less well known is that this meandering pattern itself moves as a wave with a velocity much slower than the velocity of the jet stream itself. So why does this meandering wave propagate, and what causes the m...
The reason for the initiation of the El Nino is unknown, but what is well known is how it progresses once initiated. The West Pacific warm pool begins to drift East, and the strength of the trade winds begins to decrease. In turn, the decreased trade wind strength further enhances the drift of ...
@Neo, if everyone asked 2 questions as you did, and everyone was an expert there would be 400 good questions. But I would guess only 20 experts or so on Area51, meaning only 40 good questions.
@Mew you might revisit your choice of accepted answer on earthscience.stackexchange.com/questions/370/… , the other answer is a much more thorough explanation than the one you've given the check to
On one of my questions, here, Coriolis effect and Cyclones, there were 2 answers I originally selected what I thought to be the best answer.
After I had done this, the answer I did not accept was edited to beceme far more comprehensive than it was previously. So much so that I believe it now su...
Neo: One of the difficulties that SE sometimes suffers from, IMHO, is people specifically going after rep (or other Internet Point such as badges). Perhaps unsurprisingly, it can be particularly bad on gaming.SE!
And on an unrelated matter, not just atmospheric and mantle groups, probably also ocean people :-)
The thing about rep is that if you have a good body of GOOD questions and answers out there, they effortlessly accumulate rep over time. It's only if you're trying to "game the system" that you really have to work at it ;-) (although I have no idea how the people with tens of thousands on multiple sites got there!)
@gerrit I didn't think about the sun's activity changing, which it might, but since this has already happened to mars, and the earth isn't that much bigger, it seems logical to assume the same.
There have been some discussions as to whether we want to be a site for experts, or a site for all.
There have also been discussions if some questions are too basic.
Are those two discussions essentially the same, or is there some difference between them? Can an expert question be basic? Can ...
Most of us know about the Dust Bowl, the huge storms of dirt and dust that swept across America in the 1930s, but what I'm wondering is:
What actually triggered the start of the Dust Bowl?
Is it very likely that it will occur again?
What on Earth?
What on Earth?