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.

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News Network
May 27,2020

New Delhi, May 27: With 6,387 new coronavirus cases in the last 24 hours, India's count of COVID-19 rose to 1,51,767 on Wednesday, said the Union Ministry of Health and Family Welfare.

170 people have also died in the last 24 hours due to the infection.

Currently, there are 83,004 active cases while 64,425 COVID-19 positive patients have been cured/discharged and one has migrated. So far, a total of 4,337 deaths have taken place across the country.

Among all states, Maharashtra has the highest number of COVID-19 cases with 54,758. Tamil Nadu has 17,728 cases with Gujarat at 14,821 cases. The national capital has 14,465 reported cases of coronavirus.

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News Network
April 2,2020

Thiruvananthapuram, Apr 2: With the coronavirus lockdown in place, liquor would be delivered home by state-run retail outlets in Kerala after the left government has decided to issue special passes to tipplers, who exhibit withdrawal symptoms and have doctors prescription.

Protesting the government decision, the Kerala Government Medical Officers Association (KGMOA) wore black badges on Wednesday, but attended duty and seeking immediate withdrawal of the order, saying it was "anti-people".

As per guidelines issued by the Kerala State Beverages Corporation managing director G Sparjan Kumar, for the supply of liquor, a service charge of Rs 100 would be collected from each pass holder for meeting the delivery expenses.

Each person would be entitled to 3 litres of Indian Made Foreign Liquor (IMFL) and sale of wine and beer was not envisaged, the order stated.

Those not willing to undertake the home delivery, the name and details of the employee should be reported to the Head office for submission to the government, it said.

A civil police officer will have to accompany the distribution vehicle.

The sale of liquor should be only to the pass holders, limiting it to the quantity mentioned in the pass.

Any excess sale to pass holders or sales to non-pass holders is strictly prohibited, the order said.

In the order issued on Monday, the government said, following the lockdown and the closure of liquor outlets in the state, there were many instances of social issues, including suicidal tendencies shown by those who consumed liquor regularly and the state government has decided to initiate steps to resolve the matter.

Speaking to reporters, chief minister Pinarayi Vijayan said his government has not forced anyone to prescribe liquor to addicts.

He was responding to a query on the indifference of doctors towards the matter of prescribing liquor to addicts.

"If the doctors are not ready to prescribe liquor, it's fine. We are not forcing anyone to do so. We were just following the protocol which are prevalent at many places. It's been over a week. The family and friends of the addicts can gently persuade them to approach the de-addiction centres," he said.

Sparjan Kumar said the order on home delivery was just a modality, as part of the earlier order issued by the government to provide liquor under prescription.

"We have worked out a modality. We have a meeting tomorrow. Some new order has been issued by the Centre today. The meeting will discuss the implementation of the orders," Kumar told.

A person showing withdrawal symptoms has to get a doctor's prescription on his condition so that he could be provided liquor in a "controlled manner", the order added.

The Indian Medical Association (IMA) has also come out against the government's move.

Meanwhile, Vimukthi, an anti-narcotics campaign launched by the state government, has till now admitted 64 patients since March 24.

"Since March 24, the day lockdown started, we have 64 patients admitted due to withdrawal symptoms. We have also registered at least 200 out patients at various de-addiction centres across Kerala," K Mohammed Resheed, Joint Excise Commissioner in charge of awareness told.

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Agencies
April 24,2020

New Delhi, Apr 24: The Central government said on Wednesday that the number of COVID-19 cases in the country is now doubling in every 10 days, adding that had the lockdown not been imposed on time, the number of cases would have sky-rocketed to over one lakh by now.

"Had we not taken the decision to impose nationwide lockdown, we would have had around one lakh COVID-19 cases by now. This is a reasonable estimate," said Niti Aayog member V.K. Paul.

Paul, who is also the Chairman of the government's Empowered Committee- 1, said the "cases are now doubling in every 10 days."

"As on March 21, our doubling time of cases was three days. Results started showing on March 23, due to travel restrictions imposed earlier. On April 6, further slowing of doubling rate became visible, thanks to the nationwide lockdown," he added.

He further added that the decision to impose the lockdown was timely and asserted that the curve has begun to flatten.

"Nationwide lockdown helped take us away from the exponential growth curve and thereby contain the growth of COVID-19 cases," he said.

Paul further added that surveillance has been a great strength in containing the spread of the virus.

"Besides containing the spread, augmenting testing and improving preparedness, the nation has brought about a massive behavioural change through a ‘Jan Andolan' (mass movement)," he said.

Meanwhile, the number of confirmed cases in the country has crossed the 23,000-mark, with 718 deaths. Globally, the number of cases has crossed 2.7 million while the death toll has mounted to 1.9 lakh.

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