• 9964432222
  • Mail Us
  • Appointment
  • Locate Us
  • Chat Now
  • Courses
  • Login
  • Register
Manifest IAS
JournalsOfIndia
Manifest Learning Academy
  • 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
196
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

Zero Shadow Day

Zero Shadow Day

April 26, 2023
Kerala first state to adopt Water Budget

Kerala first state to adopt Water Budget

April 24, 2023
First Census of Water Bodies

First Census of Water Bodies

April 24, 2023
The Indian Bureau of Mines (IBM)

The Indian Bureau of Mines (IBM)

April 20, 2023
Trojan asteroids

Trojan asteroids

April 19, 2023
A large deposits of 15 rare earth elements found in Andhra Pradesh

A large deposits of 15 rare earth elements found in Andhra Pradesh

April 6, 2023
Sky Canvas project

Sky Canvas project

April 4, 2023
What is “upward lightning” or “upward flashes”?

What is “upward lightning” or “upward flashes”?

March 30, 2023
NALCO develops India’s first Bauxite Certified Reference Material

NALCO develops India’s first Bauxite Certified Reference Material

March 29, 2023
What are atmospheric rivers?

What are atmospheric rivers?

March 29, 2023
Please login to join discussion

Our Offline Classroom Student

CONGRATULATIONS TO 2021 TOPPERS !!!

Rank 171 Kumar Shivashish
Rank 250 Sahithya
Rank 263 Sumit Kumar Thakur
Rank 311 Deepak Ramachandra Shet
Rank 455 Ravinandan B M

July 2025
MTWTFSS
 123456
78910111213
14151617181920
21222324252627
28293031 
« May    

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 All India Radio BBC Business Line Business Standard dow Down to Earth DownToEarth DTE Economic Times ET FAO Financial Express GS-1 GS-2 GS-3 GS-4 Hindustan Times IE India & the world Indian express Indiatoday India today Kurukshetra Livelihoods portal LiveMint Mains News Newspaper News Paper PIB Prelims PRS India RSTV Science Reporter Survey The Hindu The India Express The Indian Express The Print the wire Times of India TOI TOPPERS 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 All India Radio BBC Business Line Business Standard dow Down to Earth DownToEarth DTE Economic Times ET FAO Financial Express GS-1 GS-2 GS-3 GS-4 Hindustan Times IE India & the world Indian express Indiatoday India today Kurukshetra Livelihoods portal LiveMint Mains News Newspaper News Paper PIB Prelims PRS India RSTV Science Reporter Survey The Hindu The India Express The Indian Express The Print the wire Times of India TOI TOPPERS 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