Skip to main content
NTv Online

Sci-Tech

Sci-Tech
  • Science
  • Technology
  • Bangla Version
  • Archive
  • Bangladesh
  • World
  • Sports
  • Entertainment
  • Business
  • Comment
  • Education
  • Life
  • Health
  • Art & Culture
  • Election
  • বাংলা
  • Bangladesh
  • World
  • Sports
  • Entertainment
  • Business
  • Comment
  • Education
  • Life
  • Health
  • Art & Culture
  • Election
  • বাংলা
  • Bangla Version
  • Archive
Follow
  • Sci-Tech
IANS
10 February, 2015, 18:19
Update: 10 February, 2015, 18:19
More News
Scientists warn a million species at risk of extinction
New study says universe expanding faster and is younger
Black hole named ‘Powehi’ by Hawaii university professor
NASA calls India satellite destruction ‘terrible thing’
US scientists to climb Everest, collect data on climate

Earth’s inner core has an inner core too

IANS
10 February, 2015, 18:19
Update: 10 February, 2015, 18:19
Photo: Reuters

New York: Looking into the world’s “deepest mystery” with the help of seismic waves, researchers have found that the Earth’s inner core has an inner core of its own, which has surprising properties that could reveal information about our planet.

“Even though the inner core is small - smaller than the moon - it has some really interesting features,” said Xiaodong Song, professor of geology at University of Illinois.

“It may tell us about how our planet is formed, its history, and other dynamic processes of the Earth. It shapes our understanding of what is going on deep inside the Earth,” Song added.

Researchers use seismic waves from earthquakes to scan below the planet’s surface, much like doctors use ultrasound to see inside patients.

The team used a technology that gathers data not from the initial shock of an earthquake, but from the waves that resonate in the earthquake’s aftermath.

The inner core, once thought to be a solid ball of iron, has some complex structural properties.

The team found a distinct inner-inner core, about half the diameter of the whole inner core.

The iron crystals in the outer layer of the inner core are aligned directionally, north-south. However, in the inner-inner core, the iron crystals point roughly east-west, the study noted.

Not only are the iron crystals in the inner-inner core aligned differently, they behave differently from their counterparts in the outer-inner core. This means that the inner-inner core could be made of a different type of crystal, or a different phase, the scientists pointed out.

“The fact that we have two regions that are distinctly different may tell us something about how the inner core has been evolving,” Song said.

The study appeared in the journal Nature Geoscience.

Most Read
  1. ‘Block Screenshot for Calls’ feature to ensure imo privacy
  2. Winners of 2021 UiPath Automation Excellence Awards announced
  3. UiPath rated market leader in Zinnov Zones for HIA
  4. Mobile radiation exposure not harmful to health, environment: BTRC
  5. Intel, Qualcomm, and other chipmakers reportedly join Google in Huawei ban
  6. Google suspends some business with Huawei after Trump blacklist
Most Read
  1. ‘Block Screenshot for Calls’ feature to ensure imo privacy
  2. Winners of 2021 UiPath Automation Excellence Awards announced
  3. UiPath rated market leader in Zinnov Zones for HIA
  4. Mobile radiation exposure not harmful to health, environment: BTRC
  5. Intel, Qualcomm, and other chipmakers reportedly join Google in Huawei ban
  6. Google suspends some business with Huawei after Trump blacklist

Follow Us

Alhaj Mohammad Mosaddak Ali

Chairman & Managing Director

NTV Online, BSEC Building (Level-8), 102 Kazi Nazrul Islam Avenue, Karwan Bazar, Dhaka-1215 Telephone: +880255012281 up to 5, Fax: +880255012286 up to 7

Browse by Category

  • About NTV
  • NTV Programmes
  • Advertisement
  • Web Mail
  • NTV FTV
  • Satellite Downlink
  • Europe Subscription
  • USA Subscription
  • Privacy Policy
  • Terms & Conditions
  • Contact

Our Newsletter

To stay on top of the ever-changing world of business, subscribe now to our newsletters.

* We hate spam as much as you do

Alhaj Mohammad Mosaddak Ali

Chairman & Managing Director

NTV Online, BSEC Building (Level-8), 102 Kazi Nazrul Islam Avenue, Karwan Bazar, Dhaka-1215 Telephone: +880255012281 up to 5, Fax: +880255012286 up to 7

Reproduction of any content, news or article published on this website is strictly prohibited. All rights reserved