Scientists induce Yellowstone seismic activity to analyze the volcano’s depth

Researchers from the University of Utah and the University of New Mexico used artificial “earthquakes” to investigate the magma beneath Yellowstone, a closely monitored hypervolcano. The team deployed truck-mounted bibroseis, large mechanical vibrators, to generate seismic waves throughout the national park. By recording these waves with 650 ground sensors, scientists were able to examine the underground volcanic structures.

Dr. Jamie Farrell, a geologist at the University of Utah and study co-author, explained, “In a way, we’re causing our own earthquakes and recording all that data on seismometers. With so many sensors, we can obtain a clear image of what’s happening below the surface.” This investigation revealed that the top of the magma chamber is approximately 3.8 km below the surface, with 86% consisting of solid rock and 14% containing molten rock, gas, and liquid pockets.

Scientists deployed a portable seismometer called Geophone to measure vibrations from artificial earthquakes – Credit: Jamie Farrell, University of Utah

Professor Bill McGuire, an expert in Geophysical and Climate Hazards, noted that using artificial seismic waves to study underground geology is not new but has not been applied in Yellowstone for determining magma depth before. Despite the proximity of the magma to the surface, the study confirmed that an eruption is not imminent.

Mike Poland, the chief scientist at the US Geological Survey and Yellowstone Volcano Observatory, remarked, “Yellowstone provides valuable insights into volcano behavior worldwide. While another super eruption is possible elsewhere, Yellowstone is not currently at risk.”

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About our experts:

Professor Bill McGuire: Professor Emeritus of Geophysics and Climate Hazards at University College, London. McGuire is a science writer and broadcaster with a forthcoming book on how past events shape our future.

Source: www.sciencefocus.com

Astronomers Analyze Gas Flow in Uncommonly Bright Infrared Galaxy

Ultraluminous infrared galaxies are the rarest and most extreme star-forming systems and are found only in the distant universe.

Radiative distribution of stars, cold gas, and ionized gas in the unusual HyLIRG Einstein ring PJ0116-24. Image courtesy of Liu others., doi:10.1038/s41550-024-02296-7.

“Ultraluminous Infrared Galaxies (HyLIRGs) are incredibly luminous galaxies illuminated by extremely rapid star formation within their interiors,” said Dr Daizhong Liu from the Max Planck Institute for Extraterrestrial Physics and his colleagues.

“Previous studies had suggested that such extreme galaxies must have arisen through galactic mergers.”

“The collisions of these galaxies are thought to create regions of dense gas that trigger rapid star formation.”

“However, isolated galaxies could also become HyLIRGs through internal processes alone if star-forming gas flows rapidly toward the galaxy's center.”

In the new study, the astronomers focused on a gravitationally lensed HyLIRG galaxy known as PJ0116-24.

“PJ0116-24 is so distant that it took its light about 10 billion years to reach Earth,” the researchers said.

“By chance, the foreground galaxy acts as a gravitational lens, bending and magnifying the light from the background galaxy, PJ0116-24, and directing it towards the Einstein ring.”

“This precise configuration of space allows us to magnify very distant objects and see them with a level of detail that is very difficult to achieve any other way.

The researchers used ESO's Very Large Telescope (VLT) and the Atacama Large Millimeter/submillimeter Array (ALMA) to study the motion of gas within PJ0116-24.

“ALMA tracks the cold gas which appears blue here, while the VLT with its new High Resolution Imaging Spectrograph (ERIS) tracks the warm gas which appears red,” the researchers say.

“Thanks to these detailed observations, we now know that the gas in this extreme galaxy rotates in an organized manner, rather than the chaotic state expected after a galaxy collision. A stunning result!”

“This convincingly shows that a merger is not necessarily required for a galaxy to become a HyLIRG.”

Team paper Published in the journal Natural Astronomy.

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D. Liu othersA detailed study of a rare, ultra-luminous rotating disk in a 10 billion year old Einstein ring. Nat AstronPublished online July 15, 2024; doi: 10.1038/s41550-024-02296-7

Source: www.sci.news

Neuroscientists analyze brain scans of soccer fans to research passionate devotion

Football is a great model of social belonging, promoting inclusivity, teamwork, community spirit, social change, and individual achievement. Still, collective factors may be the reason behind acts of violence and vandalism. In a new study, neuroscientists at the University of San Sebastian investigate the brain mechanisms underlying positive and negative social stimuli in soccer fans in positive and negative social scenarios.



Mendieta other. fMRI was used to measure the brain activity of fans of rival soccer teams during a match. This image shows the contrast between winning and losing in the “good fanatic’s brain.” Activities related to important victories are shown in warm colors. The blue scale represents activations associated with significant losses. This pattern is consistent with a mentalization network suggesting a pain rationalization process triggered by a losing scenario. Image credit: Mendieta other.

“Our study aims to uncover the behaviors and dynamics associated with extreme competitiveness, aggression, and social belonging within and between fans’ groups,” said the first author. Dr. Francisco Zamorano Mendietaa researcher at the University of San Sebastian.

Rivalries are deeply rooted in the history of sports, and fans can be very protective of their “home” team and favorite players.

These same fans run through a range of emotions as they watch their team succeed or fail during a game, cheering when they score or being furious at a bad call.

Soccer fans are known for their loyalty and enthusiasm for their team, especially in Europe and South America.

To gain insight into the brain mechanisms behind fan behavior, Dr. Zamorano and his colleagues recruited 43 healthy male volunteers for a functional MRI (fMRI) study.

Participants are fans of Chile’s two most popular soccer teams, which are considered arch-rivals.

They were divided into two groups: 22 supporters of one team and 21 supporters of the rival team.

They completed a survey to determine their Soccer Enthusiasm Score and underwent a psychological evaluation.

All participants received an edited version of the match containing 63 goals.

While participants watched a compilation of matches, their brain activity was measured using fMRI, a non-invasive imaging technique that detects changes in blood flow in the brain.

The fMRI results showed that fans’ brain activity changed depending on whether their team was successful or unsuccessful.

“When your team wins, the reward system in your brain is activated,” Dr. Zamorano says.

“Losing activates the mentalization network, putting fans into a reflective state, which may alleviate some of the pain of the loss.”

“We also observed that the brain hub connecting the limbic system and frontal cortex was disrupted, disrupting mechanisms that regulate cognitive control and increasing the likelihood of destructive or violent behavior. .”

The research team’s findings could shed light on social dynamics at all levels.

“People inherently crave social connection, whether it’s membership in a running club, participation in a book discussion group, or participation in a virtual forum,” Dr. Zamorano said.

“These social bonds are often formed around shared beliefs, values ​​and interests, but there can also be elements of persuasive proselytism, or ‘groupthink’; That can lead to irrational beliefs and social discord.”

“The enthusiasm we see among some sports fans can serve as a convincing example of intense emotional investment, occasional aggressive behavior, and a decline in rationality.”

“Understanding the psychology of group identification and competition sheds light on decision-making processes and social dynamics, allowing us to more fully understand how societies operate.”

Authors present their work findings this month, Radiological Society of North America (RSNA) Annual Meeting.

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Francisco Zamorano Mendieta other. Brain mechanisms underlying emotional responses in social pain. Football as a surrogate for studying fanaticism: an fMRI study. RSNA 2023

Source: www.sci.news