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Airburst

All articles tagged with #airburst

science10 days ago•9 min saved

Tunguska 1908: How a Siberian Skyburst Redefined Our View of Space Threats

A 1908 Tunguska skyburst over Siberia flattened forests across a vast area without a crater, forcing a shift in meteor science toward recognizing airbursts and the potential for atmospheric explosions to cause widespread damage. The long-standing asteroid-or-comet identity debate persisted for decades, but later events like Chelyabinsk highlighted the real threat of such bursts. Today, improved detection and defense efforts—through projects like NASA's NEO Surveyor, the Vera Rubin Observatory, and the DART mission—aim to forecast and, if needed, alter the course of hazardous near-Earth objects, though warning times remain highly dependent on an object's approach vector.

via NDTV|

#airburst #chelyabinsk #near-earth-objects

science21 days ago•11 min saved

Tunguska 1908: a sky-borne blast that flattened forests without a crater

A 1908 explosion over remote Siberia flattened about 2,000 square kilometres of forest—an estimated 10–15 megatons of energy—yet produced no ground crater. Scientists now favor an airburst: a small asteroid (roughly 50–60 metres) disintegrated high in the atmosphere, ejecting energy into the air rather than the ground. While Lake Cheko’s crater hypothesis has been largely rejected, Tunguska remains the largest known airburst and a key reminder that near-Earth objects can devastate large areas without leaving a crater; it also underpins ongoing asteroid monitoring and risk awareness.

via Space Daily|

#airburst #asteroid #crater

science1 month ago•34 min saved

New England Fireball: Meteor's 300-Ton TNT-Equivalent Airburst

A meteor exploded in the atmosphere off the coast of Massachusetts, releasing an energy equivalent to about 300 tons of TNT and lighting up the night sky. The fireball was observed over parts of New England and produced sonic booms, while scientists collect data from radar, seismographs, and observational networks to refine estimates of its size and trajectory; no injuries or damage were reported.

via Yahoo|

#airburst #astronomy #bolide

science1 month ago•2 min saved

New England Meteor Airburst Shakes Homes with 300-Ton TNT Blast

A meteor exploded high over northeastern United States, releasing an energy equivalent to about 300 tons of TNT. The fireball traveled roughly 75,000 mph at an altitude of ~40 miles, not tied to a debris re-entry or a meteor shower. The resulting airburst generated loud booms that rattled homes and blew out windows across hundreds of square miles, injuring around 1,600 people. By comparison, the 2013 Chelyabinsk event released far more energy (around 440,000 tons).

via ScienceAlert|

#airburst #loud-booms #meteor

science1 month ago•13 min saved

The Tunguska Mystery: The 1908 Airburst That Flattened a Forest Without a Crater

In 1908 a space object exploded over Siberia in an airburst, releasing roughly 10–15 megatons of energy and flattening about 80 million trees across 830 square miles, with no crater and a ring of standing trees at the center. Scientists still debate whether it was a stony asteroid or a comet; the asteroid answer fits the ground damage while the comet explanation could account for the eerie skyglow seen across Europe. No fragment has ever been found, and the event helped spur modern planetary defense efforts, including NASA’s DART mission.

via Space Daily|

#airburst #asteroid #comet

science1 month ago•11 min saved

Tunguska 1908: The Sky Burst That Left No Ground Crater

On June 30, 1908, a sky explosion over Tunguska, Siberia leveled about 2,150 square kilometers of forest with an energy around 10–15 megatons, but left no ground crater because the object disintegrated in the atmosphere at roughly 5–10 km altitude; decades later, Leonid Kulik found no meteorite and a radial pattern of downed trees, supporting the airburst explanation and dispelling sensational theories. The object is believed to have been a ~50–60 meter stony asteroid, though Lake Cheko’s proposed crater remains contested. The event reshaped thinking about space hazards and the need to map near-Earth objects, a lesson underscored by the smaller 2013 Chelyabinsk event.

via Space Daily|

#airburst #near-earth-objects #science

archaeology2 years ago•4 min saved

The Truth Behind the Alleged Comet Destruction of Hopewell Culture

Archaeologists and scientists have criticized the claim that a comet caused the downfall of the Native American Hopewell culture 1,500 years ago. Experts argue that there is no evidence supporting the theory of an exploding comet, and that the decline of the Hopewell culture was likely due to other factors. They refute claims of burned villages, meteorites, and an upsurge in mineral concentrations as evidence, stating that these are either ceremonial burnings or natural products of local soil chemistry. The study also criticizes the mixing up of samples and materials by the researchers who proposed the comet theory.

via IFLScience|

#airburst #archaeology #comet

science3 years ago•3 min saved

The Catastrophic Consequences of an Asteroid Collision with Earth.

Scientists have calculated that if the asteroid Ryugu were to hit Earth, it would break up in the atmosphere resulting in an airburst similar to the Chelyabinsk meteor in 2013. Ryugu is considered a rubble-pile asteroid with low mechanical strength, meaning scientists would have to take great care to prevent it from breaking apart if they attempted to divert it. The asteroid's tensile strength is currently unknown, which could impact the size of the pieces that would fall to Earth. The analysis of samples returned by the Hayabusa2 spacecraft will help assess the impact of asteroids like Ryugu on Earth.

via Space.com|

#airburst #asteroid-ryugu #hayabusa2