Connect with us

Science

Solar Flare Causes Geomagnetic Storm, Aurora Expected In Northern Reaches – ExplorersWeb

Published

 on


On Saturday, October 9, specialists at NASA’s Solar Dynamics Observatory detected a solar flare from a sunspot. Solar flares happen constantly, but this one is unique: it launched a coronal mass ejection (CME) directly toward Earth’s atmosphere.

As a result, parts of the northern hemisphere as far south as New York might be lucky enough to witness an anomalous aurora borealis between dusk October 11 and dawn October 12.

Solar flare event and what to expect

Owing to its intensity and trajectory of the CME, the flare will trigger a G2-level geomagnetic storm over our planet’s northern hemisphere beginning late Monday, October 11, and lasting into Tuesday or Wednesday. In addition to the aurora borealis (aka northern lights) spectacle, scientists predict that the flare will cause a few noticeable events throughout late Monday and into Tuesday morning:

  • Moderate fluctuations to high-latitude power grids, which could potentially trigger voltage alarms and result in damage to some transformers.
  • Mild to moderate satellite and spacecraft interference, including disorientation due to increased drag on low-Earth orbiters. Such disorientation will likely require corrective repositioning by ground control agents.
  • High-latitude radio interference resulting in high-frequency propagation fades.

The Geomagnetic Storm Scale explained

Image: NOAA

NOAA established a 5-tier geomagnetic storm scale which it uses to gauge weather systems caused by solar activity. G1 storms are ‘minor’ with minimal detected effects and a high frequency of occurrence — about 1,700 times every 11 years. G5 storms constitute the most extreme and rarest storm type, with intense, far-reaching effects that can be detected as low as Florida and southern Texas. By comparison, G5 storms occur about four times every 11 years.

What we’re experiencing on October 11 is a moderate G2 storm, which is relatively mild and occurs about 600 times in 11 years.

What creates the aurora borealis?

Aurora borealis aka northern lights. Elements of image furnished by NASA. Image_ Mura T, Shutterstock

Image: NASA/Mura T. via Shutterstock

Spaceweather.com indicated the unusual northern lights show may be visible from Scotland, Northern England, and Northern Ireland in the UK, as well as Canada and the northern band of U.S., states that span from the Pacific Northwest through upper New England. Views may be visible as far down in latitude as Washington S.tate, Wisconsin, and New York.

As explained by ExWeb’s own Kristine De Abreu in Solar Storm Causes Spectacular Aurora:

 “There are two magnetic fields at play — the Earth’s and the Interplanetary Magnetic Field carried by the solar wind. While Earth’s magnetic field stays fixed over long periods (100,000s of years), the IMF fluctuates around the equinoxes, creating openings called cracks. These cracks allow particles from the solar wind to enter the magnetosphere, triggering the auroral displays. The ionization when the solar wind collides with the upper atmosphere creates a variety of colors.”

Follow along as this October solar storm develops with @NOAA or check-in with NOAA’s Space Weather Prediction Center at spaceweather.gov, which serves as the US government’s official source for space weather forecasts, watches, warnings, and alerts.

About the Author

Jilli Cluff

Jilli Cluff

Jilli grew up in the rural southern Colorado mountains, later moving to Texas for college.
After seven years in corporate consulting, she was introduced to sport climbing. In 2020, Jilli left her corporate position to pursue an outdoor-oriented life.
She now works as a contributor, an editor, and a gear tester for ExplorersWeb and various other outlets within the AllGear network.
She is based out of Austin, Texas where she takes up residence with her climbing gear and one-eared blue heeler, George Michael.

Adblock test (Why?)



Source link

Continue Reading

Science

Rocket failure mars U.S. hypersonic weapon test as others succeed

Published

 on

The Pentagon ‘s hypersonic weapon programs suffered a setback on Thursday when a booster rocket carrying a hypersonic weapon failed, people briefed on the test result said.

The test was intended to validate aspects of one of the Pentagon’s hypersonic glide vehicles in development, two of the people said.

Hypersonic glide vehicles are launched from a rocket in the upper atmosphere before gliding to a target at speeds of more than five times the speed of sound, or about 3,853 miles (6,200 kilometers) per hour.

In a separate series of tests conducted on Wednesday, the U.S. Navy and Army tested hypersonic weapon component prototypes. That test successfully “demonstrated advanced hypersonic technologies, capabilities, and prototype systems in a realistic operating environment,” the Pentagon said in a statement.

The United States and its global rivals have quickened their pace to build hypersonic weapons – the next generation of arms that rob adversaries of reaction time and traditional defeat mechanisms.

U.S. President Joe Biden expressed concern on Wednesday about Chinese hypersonic missiles, days after a media report that Beijing had tested a nuclear-capable hypersonic glide weapon.

Glide bodies are different from their air-breathing hypersonic weapon cousins which use scramjet engine technology and the vehicle’s high speed to forcibly compress incoming air before combustion to enable sustained flight at hypersonic speeds. An air-breathing hypersonic weapon was successfully tested in September.

Companies such as Lockheed Martin and Raytheon Technologies are working to develop the hypersonic weapon capability for the United States.

(Reporting by Mike Stone and Idrees Ali in Washington; Editing by Sandra Maler)

Continue Reading

Science

Patagonian fossils show Jurassic dinosaur had the herd mentality | Saltwire – SaltWire Network

Published

 on


By Will Dunham

(Reuters) – A vast trove of fossils unearthed in Argentina’s southern Patagonia region is offering the oldest-known evidence that some dinosaurs thrived in a complex and well-organized herd structure, with adults caring for the young and sharing a communal nesting ground.

Scientists said on Thursday the fossils include more than 100 dinosaur eggs and the bones of about 80 juveniles and adults of a Jurassic Period plant-eating species called Mussaurus patagonicus, including 20 remarkably complete skeletons. The animals experienced a mass-death event, probably caused by a drought, and their bodies were subsequently buried by wind-blown dust, the researchers said.

“It is a pretty dramatic scene from 193 million years ago that was frozen in time,” said paleontologist Diego Pol of the Egidio Feruglio Paleontological Museum in Trelew, Argentina, who led the research published in the journal Scientific Reports.

Mussaurus, which grew to about 20 feet (6 meters) long and about 1.5 tons, possessed a long neck and tail, with a small head. It was bipedal as an adult but newborns were quadrupedal. Mussaurus lived early in the Jurassic, the second of three periods comprising the age of dinosaurs. It was a relatively large beast for its time – much bigger than contemporaneous meat-eating dinosaurs. Dinosaurs became true giants later in the Jurassic.

“The site is one of a kind,” Pol said. “It preserves a dinosaur nesting ground including delicate and tiny dinosaur skeletons as well as eggs with embryos inside. The specimens we have found showed that herd behavior was present in long-necked dinosaurs since their early history. These were social animals, and we think this may be an important factor to explain their success.”

The animals were found to have been grouped by age at the time of their deaths, with hatchlings and eggs in one area while skeletons of juveniles were clustered nearby. The eggs were arranged in layers within trenches. Adults were found alone or in pairs.

This phenomenon, called “age segregation,” signals a complex social structure, the researchers said, including adults that foraged for meals and cared for the young. The researchers suspect that members of the herd returned to the same spot during successive seasons to form breeding colonies.

“The young were staying with the adults at least until they reached adulthood. It could be that they stayed in the same herd after reaching adulthood, but we don’t have information to corroborate that hypothesis,” said paleontologist and study co-author Vincent Fernandez of the Natural History Museum in London.

Herd behavior also can protect young and vulnerable individuals from attack by predators.

“It’s a strategy for the survival of a species,” Fernandez said.

The oldest previous evidence for dinosaur herd behavior was from about 150 million years ago.

The nesting ground was situated on the dry margins of a lake featuring ferns and conifers in a warm but seasonal climate. The eggs are about the size of a chicken’s, and the skeleton of a hatchling fits in the palm of a human hand. The adults got as heavy as a hippo.

A scanning method called high-resolution X-ray computed tomography confirmed that the embryos inside the eggs indeed were of Mussaurus.

Mussaurus was a type of dinosaur called a sauropodomorph, which represented the first great success story among herbivorous dinosaurs. Sauropodomorphs were an evolutionary forerunner to a group called sauropods known for long necks and tails and four pillar-like legs.

The largest land animals in Earth’s history were the sauropod successors of sauropodomorphs, as exemplified by a later denizen of Patagonia called Argentinosaurus that reached perhaps 118 feet (36 meters) in length and upwards of 70 tons.

(Reporting by Will Dunham in Washington, Editing by Rosalba O’Brien)

Adblock test (Why?)



Source link

Continue Reading

Science

Some of the world’s oldest rubies linked to early life – Newswise

Published

 on


Newswise — While analyzing some of the world’s oldest coloured gemstones, researchers from the University of Waterloo discovered carbon residue that was once ancient life, encased in a 2.5 billion-year-old ruby.

The research team, led by Chris Yakymchuk, professor of Earth and Environmental Sciences at Waterloo, set out to study the geology of rubies to better understand the conditions necessary for ruby formation. During this research in Greenland, which contains the oldest known deposits of rubies in the world, the team found a ruby sample that contained graphite, a mineral made of pure carbon. Analysis of this carbon indicates that it is a remnant of early life.

“The graphite inside this ruby is really unique. It’s the first time we’ve seen evidence of ancient life in ruby-bearing rocks,” says Yakymchuk. “The presence of graphite also gives us more clues to determine how rubies formed at this location, something that is impossible to do directly based on a ruby’s colour and chemical composition.”

The presence of the graphite allowed the researchers to analyze a property called isotopic composition of the carbon atoms, which measures the relative amounts of different carbon atoms. More than 98 per cent of all carbon atoms have a mass of 12 atomic mass units, but a few carbon atoms are heavier, with a mass of 13 or 14 atomic mass units.

“Living matter preferentially consists of the lighter carbon atoms because they take less energy to incorporate into cells,” said Yakymchuk. “Based on the increased amount of carbon-12 in this graphite, we concluded that the carbon atoms were once ancient life, most likely dead microorganisms such as cyanobacteria.”

The graphite is found in rocks older than 2.5 billion years ago, a time on the planet when oxygen was not abundant in the atmosphere, and life existed only in microorganisms and algae films.

During this study, Yakymchuk’s team discovered that this graphite not only links the gemstone to ancient life but was also likely necessary for this ruby to exist at all. The graphite changed the chemistry of the surrounding rocks to create favourable conditions for ruby growth. Without it, the team’s models showed that it would not have been possible to form rubies in this location.

The study, Corundum (ruby) growth during the final assembly of the Archean North Atlantic Craton, southern West Greenland, was recently published in Ore Geology Reviews. A companion study, The corundum conundrum: Constraining the compositions of fluids involved in ruby formation in metamorphic melanges of ultramafic and aluminous rocks, was published in the journal Chemical Geology in June.

Adblock test (Why?)



Source link

Continue Reading

Trending