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12 Oct 2024 - 08:24 am

A severe geomagnetic storm could cause colorful auroras over Northern California and Alabama
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Colorful auroras could be visible in areas of the United States such as Alabama and Northern California — much farther south than they typically appear — on Thursday evening due to a powerful solar flare and coronal mass ejection released from the sun, according to the National Weather Service’s Space Weather Prediction Center.

The severe solar storm, classified as a level 4 on a scale from 1 to 5, also could disrupt communications, the power grid and satellite operations, according to officials at the center.

The storm is expected to reach Earth between early morning and 12 p.m. ET Thursday, with the potential to last through Friday.

The intensity and full characteristics of the storm, moving toward Earth at more than 2.5 million miles per hour (about 4 million kilometers per hour), won’t be known until it reaches the Deep Space Climate Observatory and the Advanced Composition Explorer satellites orbiting 1 million miles from Earth.

The satellites will measure the speed and magnetic intensity of the storm, which is expected to arrive at Earth 15 to 30 minutes after reaching the space observatories, said Shawn Dahl, service coordinator for the Space Weather Prediction Center, at a news briefing Wednesday.

A series of the most intense type of solar flares, known as X-class flares, have released from the sun this week. The flares also coincided with coronal mass ejections on Tuesday.

Coronal mass ejections are large clouds of ionized gas called plasma and magnetic fields that erupt from the sun’s outer atmosphere. When these outbursts are directed at Earth, they can cause geomagnetic storms, or major disturbances of Earth’s magnetic field.

“Geomagnetic storms can impact infrastructure in near-Earth orbit and on Earth’s surface,” according to the Space Weather Prediction Center.

As a result, the center has notified the Federal Emergency Management Agency, the North American power grid and satellite operators to prepare for disruptions, especially given the amount of preparations and expected relief efforts for Hurricane Milton, Dahl said.

Historically, G4 storms are common during a solar cycle, but G5, or extreme geomagnetic storms such the one that occurred on May 10, are incredibly rare, Dahl said. This new storm has a 25% chance of becoming a G5, he said.

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12 Oct 2024 - 08:16 am

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12 Oct 2024 - 06:57 am

Arrowheads reveal the presence of a mysterious army in Europe’s oldest battle
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Today, the lush, green valley surrounding the Tollense River in northeast Germany appears to be a serene place to appreciate nature.

But to archaeologists, the Tollense Valley is considered Europe’s oldest battlefield.

An amateur archaeologist first spotted a bone sticking out of the riverbank in 1996.

A series of ongoing site excavations since 2008 has shown that the thousands of bones and hundreds of weapons preserved by the valley’s undisturbed environment were part of a large-scale battle 3,250 years ago.

The biggest mysteries that researchers aim to uncover are why the battle occurred and who fought in it. These are questions that they are now one step closer to answering.
ozens of bronze and flint arrowheads recovered from the Tollense Valley are revealing details about the able-bodied warriors who fought in the Bronze Age battle.

The research team analyzed and compared the arrowheads, some of which were still embedded in the remains of the fallen. While many of these weapons were locally produced, some bearing different shapes came from a region that now includes modern Bavaria and Moravia.

The outliers’ presence suggests that a southern army clashed with local tribes in the valley, and researchers suspect the conflict began at a key landmark along the river.

Back to the future
Scientists are harnessing the power of artificial intelligence to detect hidden archaeological sites buried below the sand of the sprawling Rub‘ al-Khali desert.

The desert spans 250,000 square miles (650,000 square kilometers) on the Arabian Peninsula, and its name translates to “the Empty Quarter” in English. To unravel the secrets of the desolate terrain, researchers are combining machine learning with a satellite imagery technique that uses radio waves to spot objects that may be concealed beneath surfaces.

The technology will be tested in October when excavations assess whether predicted structures are present at the Saruq Al Hadid complex in Dubai, United Arab Emirates.

Separately, an AI-assisted analysis uncovered a trove of ancient symbols in Peru’s Nazca Desert, nearly doubling the number of known geoglyphs, or stone and gravel arranged into giant shapes that depict animals, humans and geometric designs.

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12 Oct 2024 - 06:34 am

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