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
March 4,2020

Bhopal, Mar 4: Madhya Pradesh Chief Minister  Kamal Nath on Tuesday asserted that there was no threat to his government.

Nath's comments came when he was asked about reports of alleged 'poaching' attempts being made by the opposition BJP in the state.

“The legislators are telling me that they are being offered so much money. I am telling the MLAs to take it, if they are getting this free money,” Nath told reporters here on the sidelines of a programme.

Congress veteran Digvijaya Singh on Monday alleged that his party MLAs were being offered “huge money by BJP leaders” as part of the saffron party's “poaching” attempt to destablise the Kamal Nath government.

When Nath was asked about any threat to the stability of his government in Madhya Pradesh, he said, “There is nothing to worry about.”

Reacting to Nath's statement, state BJP spokesman Rajneesh Agrawal told PTI that his party has nothing to do with the allegations.

“In fact, these speculations and allegations are part of the internal bickering of among Congress leaders to get nominated for the Rajya Sabha polls,” he said.

After Digvijaya Singh's remarks on Monday, senior BJP leader and former chief minister Shivraj Singh Chouhan accused the Congress veteran of making false statements to create sensationalism.

“Speaking lies to create sensationalism is Digvijaya's habit. Probably some of his (Digivijaya's) works were not done and he wants to create pressure on the CM to get them done,” Chouhan alleged.

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News Network
March 20,2020

New Delhi, Mar 20: The government on Thursday said one Indian who tested positive for coronavirus has died in Iran while the other citizens infected with the disease are being provided treatment and taken care of by the Iranian government.

Noting that the virus tends to be more fatal for those whose immunity levels are low, a senior MEA official said the deceased, an elderly person, belonged to the vulnerable age group and had health-related complications.

The death was not because of lack of medical attention or care, he said.

"We have evacuated 590 people from Iran where the situation is very severe. The Indians infected with coronavirus in Iran have been segregated and taken care of very well by the government there. We believe they will recover and we will bring them back," the MEA official said, adding that 201 Indians were evacuated from Iran on Wednesday.

The official said closely knit families required some persuasion and counselling during the process of segregation to prevent the spread of the contagion.

The Indian ambassador and other officials explained the consequences of infected people not being separated from their families and were successful to a large extent in segregating the positive cases from the negative ones, he said.

"Some pilgrims and students are still there and our embassy and mission are in control (of the situation)," the official said.

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Agencies
February 9,2020

Panaji, Feb 10: Archbishop of Goa and Daman, Rev Filipe Neri Ferrao, has urged the central government to "immediately and unconditionally revoke the Citizenship Amendment Act" and stop quashing the "right to dissent".

He also appealed to the government not to implement the proposed countrywide National Register of Citizens (NRC) and the National Population Register (NPR).

Diocesan Centre for Social Communications Media, a wing of the Goa Church, in a statement on Saturday said, "The Archbishop and the Catholic community of Goa would like to appeal to the government to listen to the voice of millions in India, to stop quashing the right to dissent and, above all, to immediately and unconditionally revoke the CAA and desist from implementing the NRC and the NPR."

The CAA, NRC and NPR are "divisive and discriminatory" and will certainly have a "negative and damaging effect" on a multi-cultural democracy like ours, the church said.

There is serious concern that NRC and NPR will result in "direct victimisation of the underprivileged classes, particularly Dalits, adivasis, migrant labourers, nomadic communities and the countless undocumented people who, after having been recognised as worthy citizens and voters for more than 70 years, will suddenly run the risk of becoming stateless and candidates for detention camps," it said.

There has been widespread discontent and open protests throughout the country and even abroad against the CAA, NRC and NPR, which are "forecasting a systematic erosion of values, principles and rights" that have been guaranteed to all citizens in the Constitution, the release said.

Eminent citizens, including top intellectuals and legal luminaries, have taken a studied and unequivocal stand against the CAA, NRC and NPR, it noted.

Goa also witnessed several protests, which transcended the confines of religious and caste affiliation and brought people from all walks of life together on one united platform, said the statement.

It said Christians in India have always been a peace loving community and deeply committed to the ideals of justice, liberty, equality and fraternity, enshrined in the
Constitution.

"We have always taken great pride that our beloved country is a secular, sovereign, socialist, pluralistic anddemocratic republic," the church said.

The very fact that CAA uses religion goes against the secular fabric of the country, it said.

"It goes against the spirit and heritage of our land which, since times immemorial, has been a welcoming home to all, founded on the belief that the whole world is one big family," the church said.

"We pray for our beloved country, that good sense, justice and peace prevail in the hearts and minds of all," it added.

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