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Posts treating: "rotation"

Tuesday, 17 November 2015

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Rotation an important factor in Earth’s evolution 

AGU Meetings [2015-11-17 18:42:50]  recommend  recommend this post  (166 visits) info
Around 4.5 billion years ago, shortly after the solar system was formed, an object roughly the size of Mars smashed into Earth. The energy of this impact sheared off enough material to create the Moon and melt the young Earth’s mantle into a giant ocean of magma roughly 1,000 kilometers (approximately 621 miles) deep. This magma ocean set the stage for the evolution of the Earth’s rocky mantle and could have created Earth’s early magnetic field which shielded the planet from the solar [...]

Is Xenoposeidon a rebbachisaur? 

Sauropod Vertebra Picture of the Week [2015-07-14 10:36:31]  recommend  recommend this post  (195 visits) info

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Now that the new Wilson and Allain (2015) paper has redescribed Rebbachisaurus, we can use it to start thinking about some other specimens. Particularly helpful is this beautiful rotating animation of the best dorsal vertebra (here captured at the point of the rotation where we’ve viewing it in right anterolateral): As I briefly discussed on Twitter, seeing this made

The Greatest Geek Experiment Ever 

Dan\'s Wild Wild Science Journal [2015-06-07 03:43:22]  recommend  recommend this post  (288 visits) info
Will toilets in different hemispheres drain in opposite directions? This has long been a great trivia question and the usual answer is that the radius of rotation is too small to detect any difference. This basically true, because the rotation you see mainly depends on how the toilet is constructed. However, if you control for everything, can you detect the coriolis force in the way a child’s kiddie pool drains??

Physics - High Energy Part 2 

Ontario-geofish [2015-05-25 17:55:00]  recommend  recommend this post  (185 visits) info

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The highest energy thing we have going here is the rotation of the Earth, followed by the radiation heat deep in the Mantle.  I don't know how many atomic bombs they are, or how many seconds of the Sun, but it is huge.  Man isn't even the flea on these elephants.  The orbit of the Moon is somewhere there, and that controls the tides. For the rotation, two things leech off it - ocean

U.S. hurricanes begin in western Africa’s atmosphere 

AGU Meetings [2015-03-16 19:59:19]  recommend  recommend this post  (88 visits) info
Hurricanes require moisture, the rotation of the Earth, and warm ocean temperatures to grow from mere atmospheric disturbances into tropical storms. But where do these storm cells originate, and exactly what makes an atmospheric disturbance amp up full throttle? A new study accepted for publication in Geophysical Research Letters finds most hurricanes over the Atlantic Ocean that eventually make landfall in North America actually start as intense thunderstorms in western

Recording Geotechnical Drill Rig Parameters 

GeoPrac.net [2014-09-09 08:11:18]  recommend  recommend this post  (105 visits) info

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Providing geotechnical drilling parameters such as thrust, rotation, rate of penetration, and flush pressure will soon be incorporated into European Standard EN22574-15 and is already in BS5930. Having these parameters available gives geotechnical engineers another tool in the toolbox to characterize the subsurface. But I am not familiar with any drilling companies here in the US that can record and report this type of data. Does anyone use this technology in their practice? What kind of [...]

Big Picture Lessons from an Unfortunate Tweet 

Dan\'s Wild Wild Science Journal [2014-05-21 23:22:37]  recommend  recommend this post  (66 visits) info

 US
This is a re-post from the blog of Dr. Marshall Shepherd, past president of the American Meteorological Society. (Highlighting is mine)   Just in case someone asks, No, there is not enough rotation and scale to produce the Coriolis Effect by spinning the Wheel of Fortune.Now that we have clarified that, I wanted to use the recent Pat Sajak tweet to turn a negative to a positive.  I don’t know

Measuring Wind With Microphones? 

Geology.com News [2014-03-02 13:06:25]  recommend  recommend this post  (50 visits) info

 US
“We have demonstrated for the first time that we can use ambient noise to measure wind speeds. [...] Eventually, the method could be used to cheaply measure wind speed and direction in the atmosphere, critical information for weather forecasts, or even to study the rotation of Earth’s core.” Quoted from the University of Colorado Boulder

New earthquake and paleoseismology papers in SRL, J Struc Geol 

Paleoseismicity [2013-09-06 00:03:05]  recommend  recommend this post  (56 visits) info
The latest issue of the Seismological Research Letters (SRL) has at least three papers dealing with topics interesting for paleoseismologists. Hinzen et al. studied the rotation of objects (e.g., monuments) during the L’Aquila earthquake of 2009. They scanned the rotated … Continue reading

Close Encounter with a Big Asteroid on May 31 

Geology.com News [2013-05-22 07:44:34]  recommend  recommend this post  (83 visits) info
Earth’s May 31 “close call” with a 1.7 mile-wide asteroid has radio astronomers excited. Fortunately it is going to miss Earth by over 3 million miles. “Whenever an asteroid approaches this closely, it provides an important scientific opportunity to study it in detail to understand its size, shape, rotation, surface features, and what they can

US89 slide may be failure in a larger ancient slide block 

Arizona Geology [2013-02-20 19:11:00]  recommend  recommend this post  (69 visits) info
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We are getting photos from a variety of sources showing the slump or slide that closed US89 this morning. Ron Schott posted this interpretation (copyrighted) of the slump on flickr, which shows that it is part of a much larger ancient slump/slide complex. Phil Pearthree here at AZGS suggests that this is a particular type of landslide that involves rotation of a block of more cohesive
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