Earthquakes unveil deep rock structure under East Asia

May 15, 2015

Washington, May 15: Scientists have found a towering rock structure deep under East Asia by using 3-D supercomputer simulations of data from 227 earthquakes that hit the region during 2007-2011.

deep rock

The finding could throw light on the fate of the subducted continental plates beneath the Tibetan Plateau, known as ‘the roof of the world,’ which rises about 5km above sea level.

The work may also help find hidden hydrocarbon resources, and more broadly it could help explore the Earth under East Asia and the rest of the world, researchers said.

“We are combining different kinds of seismic waves to render a more coherent image of the Earth,” said principal investigator and lead author Min Chen from the Rice University.

Researchers combined seismic records from thousands of stations for each earthquake to produce scientifically accurate, high-resolution 3-D tomographic images of the subsurface beneath immense geological formations.

Like a thrown pebble generates ripples in a pond, earthquakes make waves that can travel thousands of miles through the Earth.

A seismic wave slows down or speeds up a small percentage as it travels through changes in rock composition and temperature.

The scientists mapped these wave speed changes to model the physical properties of rock hidden below ground.

“We found that beneath the Tibetan plateau, the world’s largest and highest plateau, there is a sub-vertical high velocity structure that extends down to the bottom of the mantle transition zone,” the principal investigator said.

The bottom of the transition zone goes to depths of 660 kilometres, she said.

“Three-dimensional geometry of the high velocity structure depicts the lithosphere beneath the plateau, which gives clues of the fate of the subducted oceanic and the continental parts of the Indian plate under the Eurasian plate,” she added.

The research was published in the Journal of Geophysical Research, Solid Earth.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
June 5,2020

New Delhi, Jun 5: Shares of Reliance Industries on Friday gained over 2 per cent to hit their one-year high level after the company announced sale of 1.85 per cent stake in its digital unit, Jio Platforms, to Abu Dhabi-based sovereign investor Mubadala.

On BSE, the heavyweight stock jumped 2.38 per cent to Rs 1,617.70 -- its 52-week high.

It surged 2.41 per cent to its one-year high of Rs 1,618 on NSE.

Earlier in the day, Reliance Industries announced the sale of 1.85 per cent stake in its digital unit to Mubadala for Rs 9,093.60 crore, the sixth deal in as many weeks that will inject a combined Rs 87,655.35 crore in the oil-to-telecom conglomerate to help it pare debt.

"Mubadala Investment Company (Mubadala) will invest Rs 9,093.60 crore in Jio Platforms at an equity value of Rs 4.91 lakh crore and an enterprise value of Rs 5.16 lakh crore," the company said in a statement.

With this investment, Jio Platforms has raised Rs 87,655.35 crore from leading global technology and growth investors including Facebook, Silver Lake, Vista Equity Partners, General Atlantic, KKR and Mubadala in less than six weeks.

Jio Platforms, a wholly-owned subsidiary of Reliance Industries Ltd, is a next-generation technology company.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
February 28,2020

Feb 28: The best economic tonic for the coronavirus shock is to contain its spread and worry about stimulus later, said Raghuram Rajan, former head of the Reserve Bank of India.

There’s little central banks can do, and while more government spending would help, the priority should be on convincing companies and households that the virus is under control, he said.

“People want to have a sense that there is a limit to the spread of this virus perhaps because of containment measures or because there is hope that some kind of viral solution can be found,” Rajan told Bloomberg Television’s Haidi Stroud Watts and Shery Ahn.

“At this point I would say the best thing that governments can do is to really fight the epidemic rather than worry about stimulus measures that comes later,” said Rajan, who is currently a professor at the Chicago Booth School of Business.

The spread of coronavirus is pushing the world economy toward its worst performance since the financial crisis more than a decade ago.

Bank of America Corp. economists warned clients Thursday that they now expect 2.8% global growth this year, the weakest since 2009.

“We have moved from extreme confidence in markets to extreme panic, all in the space of one week,” said Rajan, who previously was chief economist at the International Monetary Fund.

The virus outbreak will force companies to rethink supply chains and overseas production facilities, he said.

“I think we will see a lot of rethinking on this, coming on the back of the trade disruption, now we have this,” Rajan said. “Globalization in production is going to be hit quite badly.”

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
Agencies
March 6,2020

Mumbai, Mar 6; The Indian equity indices slumped on Friday morning, with the BSE Sensex falling over 1,450 points

The slump across the sectoral indices was led by the finance and banking stocks as the Reserve Bank of India on Thursday superseded the board of directors of Yes Bank and placed it under moratorium.

Persistent fears of the coronavirus outbreak severely impacting global economy also weighed on the investor sentiments, analysts said.

At 9.36 a.m., the BSE Sensex trimmed some losses and was trading at 37,376.66, lower by 1,093.95 points or 2.84 per cent from the previous close of 38,470.61

So far, the index has touched an intra-day low of 37,011.09, falling by 1,459.52 points.

It had opened at the intra-day high of 37,613.96.

The Nifty50 on the National Stock Exchange was trading at 10,938.75, lower by 330.25 or 2.93 per cent from its previous close.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.