NEW YORK (AP) — Scientists have detected cosmic waves that sound like birds chirping in an unexpected place.
These bursts of plasma, called chorus waves, ripple at the same frequency as human hearing. When converted to audio signals, their sharp notes mimic high-pitched bird calls.
Researchers have captured such sounds in space before, but now they have sensed the chirping waves from much farther away: over 62,000 miles (100,000 kilometers) from Earth, where they've never been measured before.
“That opens up a lot of new questions about the physics that could be possible in this area,” said Allison Jaynes, a space physicist at the University of Iowa who was not involved with the work.
Scientists still aren’t sure how the perturbations happen, but they think Earth’s magnetic field may have something to do with it.
The chorus has been picked up on radio antennas for decades, including receivers at an Antarctica research station in the 1960s. And twin spacecraft — NASA's Van Allen Probes — heard the chirps from Earth's radiation belts at a closer distance than the newest detection.
The latest notes were picked up by NASA's Magnetospheric Multiscale satellites, launched in 2015 to explore the Earth and sun's magnetic fields. The new research was published Wednesday in the journal Nature.
Chorus waves have also been spotted near other planets including Jupiter and Saturn. They can even produce high-energy electrons capable of scrambling satellite communications.
“They are one of the strongest and most significant waves in space,” said study author Chengming Liu from Beihang University in an email.
The newfound chorus waves were detected in a region where Earth's magnetic field is stretched out, which scientists didn't expect. That raises fresh questions about how these chirping waves form.
“It's very captivating, very compelling,” Jaynes said. “We definitely need to find more of these events.”
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NASA’s four Magnetospheric Multiscale, or MMS, satellites at the Astrotech Space Operations facility in Titusville, Florida, March 2015. (NASA via AP)
NEW YORK (AP) — Oil prices rose sharply Monday as U.S. and Israeli attacks on Iran and retaliatory strikes against Israel and U.S. military installations around the Gulf sent disruptions through the global energy supply chain.
Traders were betting the supply of oil from Iran and elsewhere in the Middle East would slow or grind to a halt. Attacks throughout the region, including on two vessels traveling through the Strait of Hormuz, the narrow mouth of the Persian Gulf, have restricted countries’ ability to export oil to the rest of the world. Prolonged attacks would likely result in higher prices for crude oil and gasoline, according to energy experts.
West Texas Intermediate, the light, sweet crude oil produced in the United States, was selling for about $72 a barrel early Monday, up around 7.3% from its trading price of about $67 on Friday, according to data from CME group.
A barrel of Brent crude, the international standard, was trading at $78.55 per barrel early Monday, according to FactSet, up 7.8% from its trading price of $72.87 on Friday, which had been a seven-month high at the time.
Higher global energy prices could lead to consumers paying more for gasoline at the pump and shelling out more for groceries and other goods, at a time when many are already feeling the impacts of elevated inflation.
Roughly 15 million barrels of crude oil per day — about 20% of the world’s oil — are shipped through the Strait of Hormuz, making it the world’s most critical oil chokepoint, according to Rystad Energy. Tankers traveling through the strait, which is bordered in the north by Iran, carry oil and gas from Saudi Arabia, Kuwait, Iraq, Qatar, Bahrain, the UAE and Iran.
Iran had temporarily shut down parts of the strait in mid-February for what it said was a military drill, which led oil prices to jump about 6% higher in the days that followed.
Against that backdrop, eight countries that are part of the OPEC+ oil cartel announced they would boost production of crude Sunday. The Organization of Petroleum Exporting Countries, in a meeting planned before the war began, said it would increase production by 206,000 barrels per day in April, which was more than analysts had been expecting. The countries boosting output include Saudi Arabia, Russia, Iraq, the United Arab Emirates, Kuwait, Kazakhstan, Algeria and Oman.
“Roughly one-fifth of global oil supply passes through the Strait of Hormuz, a vital artery for world trade, meaning markets are more concerned with whether barrels can move than with spare capacity on paper,” said Jorge León, Rystad's senior vice president and head of geopolitical analysis, in an email. "If flows through the Gulf are constrained, additional production will provide limited immediate relief, making access to export routes far more important than headline output targets.”
Iran exports roughly 1.6 million barrels of oil a day, mostly to China, which may need to look elsewhere for supply if Iran’s exports are disrupted, another factor that could increase energy prices.
FILE - Fishermen work in front of oil tankers south of the Strait of Hormuz Jan. 19, 2012, offshore the town of Ras Al Khaimah in United Arab Emirates. (AP Photo/Kamran Jebreili, File)
