• 9964432222
  • Mail Us
  • Appointment
  • Locate Us
  • Chat Now
  • Courses
  • Login
  • Register
Manifest IAS
JournalsOfIndia
Advertisement
  • Home
  • SNIPPETSfor Prelims
  • ARTICLESfor Mains
  • BROWSEBY SOURCE
  • DOWNLOADS
No Result
View All Result
  • Home
  • SNIPPETSfor Prelims
  • ARTICLESfor Mains
  • BROWSEBY SOURCE
  • DOWNLOADS
No Result
View All Result
JournalsOfIndia
No Result
View All Result
Home Geography

Iron Snow on Earth’s Inner Core

July 28, 2020
in Geography
Reading Time: 2 mins read
0
160
VIEWS
Share on WhatsAppShare on TelegramShare on Facebook
image_pdfMake PDF

Recently a study claimed that earth’s inner core is made out of iron snow

Key observations

  • According to the study, published in the journal JGR Solid Earth, the iron-snow falls from the molten outer core, and piles up on top of the inner core, creating stacks up to 200 miles thick which cover the innermost layer of the planet.
  • The researchers, including those from the University of Texas at Austin in the US, studied this layer by recording and analysing signals from seismic waves as they passed through the Earth.
  • In doing so, they found variations between recent seismic wave data, and the values they expected based on mathematical models of the Earth’s core, raising new questions.
  • One of their observations was that the seismic waves moved much slower than expected when they passed through the base of the outer core, and they moved faster than estimates as they passed through the eastern hemisphere of the top inner core.
  • Based on these findings, the study proposed the iron snow-capped core as an explanation for these aberrations.
  • Earlier studies had pointed that a slurry layer exists between the inner and outer core, however the existing knowledge at that time about heat and pressure conditions in the core quashed that theory
  • With new data from experiments on core-like materials, the scientists found that crystallisation was possible and that about 15 per cent of the lowermost outer core could be made of iron-based crystals.
  • They said these could eventually fall down the liquid outer core and settle on top of the solid inner core.
  • According to the researchers, accumulated snow pack may be the cause of the seismic aberrations.
  • They said the slurry-like composition of the snow pack slows the seismic waves in such a way that the variation in snow pile size — thinner in the eastern hemisphere and thicker in the western — affected the speed of the waves.
  1. The Earth’s core has never been sampled, thus scientists try to study it by analysing signals from seismic waves.
  2. The Earth’s core has a major influence over phenomena that affects the entire planet, which includes generating its magnetic field to radiating the heat that drives the movement of tectonic plates. Understanding the core and its composition, can help us understand how these processes work.

 

 

image_pdfMake PDF
Tags: Prelims

Related Posts

Amalthea moon

Amalthea moon

May 16, 2022
Marsquake

Marsquake

May 12, 2022
Blood Moon total lunar eclipse

Blood Moon total lunar eclipse

May 10, 2022
Solomon Islands

Solomon Islands

May 9, 2022
Titan satellite

Titan satellite

May 9, 2022
Kwar hydroelectric project

Kwar hydroelectric project

April 29, 2022
Europa

Europa

April 23, 2022
Bernardinelli-Bernstein comet

Bernardinelli-Bernstein comet

April 18, 2022
‘Long Period Average’ (LPA)

‘Long Period Average’ (LPA)

April 18, 2022
Mullaperiyar Dam

Mullaperiyar Dam

April 14, 2022
Please login to join discussion

Our Offline Classroom Student

PRELIMS 2021 POLITY QUESTIONS ANALYSED

https://youtu.be/5q8hBcRGhAs

PRELIMS 2021 HISTORY QUESTIONS ANALYSED

https://youtu.be/v0SIZ7SUybg

CONGRATULATIONS TO 2020 TOPPERS !!!

Rank 25 Vaibhav Rawat 

Rank 218 Kankanala Rahul Reddy
Rank 385 Sagar A Wadi
Rank 504 Malashree MV
Rank 573 Shridevi B V
Rank 707 Mamatha G

COURSES OFFERED

PRELIMS SURESHOTS

May 2022
MTWTFSS
 1
2345678
9101112131415
16171819202122
23242526272829
3031 
« Apr    

Browse by Category

  • Agriculture
  • Disaster Management
  • Economy
  • Environment
  • Ethics
  • Foreign Affairs
  • Geography
  • Governance
  • History
  • Law & Policy
  • Opinion
  • People in News
  • Places in News
  • Science & Tech
  • Security
  • Society
  • Sports
  • Uncategorized

Browse by Tags

AIR BBC Business Standard CNN Deccan Herald DownToEarth Down to Earth DTE Economic Times ET GS-1 GS-2 GS-3 GS-4 Hindustan Times IE India & the world Indian express India today Indiatoday Kurukshetra LiveMint Mains News News Paper Newspaper PIB PIB & The Hindu pre Prelims PRS India RSTV Science Reporter Survey The Hindu The Hindustan Times The India Express The Indian Express The New Indian Express Times of India TOI TOPPERS UNDP website Wikipedia Yojana
JournalsOfIndia

Our vision is to orient the readers to grasp the facts objectively and analyse critically. In the rush of reaching first to the readers, the websites miss the balanced opinion, which is the need of the hour. We aim to reach the readers with more crispness, preciseness and relevance. We bring the articles in UPSC way for the civil services aspirants and the Wisest Way for general readers.

Categories

  • Agriculture
  • Disaster Management
  • Economy
  • Environment
  • Ethics
  • Foreign Affairs
  • Geography
  • Governance
  • History
  • Law & Policy
  • Opinion
  • People in News
  • Places in News
  • Science & Tech
  • Security
  • Society
  • Sports
  • Uncategorized

Browse by Tag

AIR BBC Business Standard CNN Deccan Herald DownToEarth Down to Earth DTE Economic Times ET GS-1 GS-2 GS-3 GS-4 Hindustan Times IE India & the world Indian express India today Indiatoday Kurukshetra LiveMint Mains News News Paper Newspaper PIB PIB & The Hindu pre Prelims PRS India RSTV Science Reporter Survey The Hindu The Hindustan Times The India Express The Indian Express The New Indian Express Times of India TOI TOPPERS UNDP website Wikipedia Yojana

Newsletter

The most important UPSC news and events of the day.

Get Journals daily newsletter on your inbox.

© 2020 JournalsOfIndia - A free initiative by Manifest Team.

  • Login
  • Sign Up
  • Home
  • SNIPPETS
  • ARTICLES
  • BROWSE
  • DOWNLOADS
No Result
View All Result

© 2020 JournalsOfIndia - A free initiative by Manifest Team.

Welcome Back!

Login to your account below

Forgotten Password? Sign Up

Create New Account!

Fill the forms bellow to register

All fields are required. Log In

Retrieve your password

Please enter your username or email address to reset your password.

Log In