Chelyabinsk meteor
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| Chelyabinsk meteor | |
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| Name | Chelyabinsk meteor |
| Caption | Entry trajectory over Chelyabinsk Oblast airspace on 15 February 2013 |
| Date | 15 February 2013 |
| Time | 09:20:30 YEKT |
| Location | near Chelyabinsk, Russia |
| Type | Airburst of stony meteoroid |
| Estimated mass | ~12,000–13,000 tonnes (pre‑entry) |
| Estimated diameter | ~17–20 m |
| Energy release | ~400–500 kilotons TNT equivalent |
| Casualties | ~1,500 injured (mostly from broken glass) |
| Notable | Largest recorded airburst since Tunguska event |
Chelyabinsk meteor The Chelyabinsk meteor was a daylight airburst over Chelyabinsk Oblast on 15 February 2013 that produced a bright fireball, a powerful shock wave, and widespread window damage across Chelyabinsk and nearby towns. The event injured about 1,500 people, caused structural damage, and attracted rapid attention from observatories, planetary defense organizations, and media worldwide. It became a focal point for studies by planetary scientists, astronomers, geophysicists, and atmospheric researchers.
Overview and event
An approximately 17–20‑metre stony meteoroid entered Earth's atmosphere at ~19 km/s over the southern Ural Mountains near Chelyabinsk on 15 February 2013, producing an airburst at 23–30 km altitude and releasing energy comparable to hundreds of kilotons of TNT. The event's luminous trajectory and ensuing sonic boom were captured by thousands of surveillance cameras, dashcams, and seismographs across Chelyabinsk Oblast, Kurgan Oblast, Sverdlovsk Oblast, and farther regions such as Yekaterinburg and Kurgan. News agencies, national media outlets, and emergency services in Russia coordinated initial responses while international institutions including the NASA Planetary Defense Coordination Office, the European Space Agency, and research centers in United States, United Kingdom, Germany, and Japan began analyses.
Observation and detection
The meteor was observed visually by residents and recorded by widespread civilian cameras, enhancing datasets for trajectory reconstruction by teams at institutions like Kazan Federal University, the Institute of Physics of the Earth (Moscow), and Moscow State University. Radar and infrasound stations operated by networks such as the Comprehensive Nuclear-Test-Ban Treaty Organization detected the airburst signature, and seismic arrays run by the Russian Academy of Sciences registered ground-coupled waves. Space agencies including NASA and the Russian Federal Space Agency (Roscosmos) issued rapid assessments; orbital surveys such as NEOWISE and ground-based surveys like Catalina Sky Survey and Pan-STARRS were referenced to contextualize precovery capabilities. International collaborations among Smithsonian Institution researchers, Max Planck Society teams, and California Institute of Technology analysts produced early peer-reviewed trajectory and mass estimates.
Physical characteristics and origin
Recovered fragments classified as LL5 ordinary chondrite meteorites provided petrological, isotopic, and mineralogical evidence linking the body to near‑Earth object reservoirs such as the Apollo population. Laboratory analyses at institutions including the Vernadsky Institute, University of California, Berkeley, Imperial College London, and University of Tokyo measured shock metamorphism, cosmic‑ray exposure ages, and trace element abundances, constraining pre‑entry mass (~12,000–13,000 tonnes), bulk density, porosity, and fragmentation behavior. Dynamical studies by researchers at Jet Propulsion Laboratory, Harvard–Smithsonian Center for Astrophysics, and Leiden Observatory used orbital reconstruction to suggest an origin in the inner main asteroid belt with subsequent evolution via the ν6 secular resonance or 3:1 Kirkwood gap into an Earth‑crossing orbit.
Impact effects and damage
The airburst produced a bright bolide, ultraviolet and visible radiation recorded by atmospheric sensors on satellites such as GOES and Meteosat, and a shock wave that shattered windows and damaged facades across Chelyabinsk and neighboring towns. Hospitals in Chelyabinsk and regional clinics treated flash‑blast injuries, chiefly from glass, while emergency responders from Ministry of Emergency Situations (Russia) assessed structural hazards. Economic impacts involved repair of public buildings, schools, and industrial facilities, with insurance interests and municipal authorities coordinating recovery. The event prompted comparisons with the Tunguska event of 1908 and stimulated policy dialogues at forums including United Nations Office for Outer Space Affairs and scientific panels at International Astronomical Union meetings.
Scientific study and analysis
Multidisciplinary teams from Russian Academy of Sciences, NASA, European Southern Observatory, Riken, and universities worldwide integrated video triangulation, infrasound, radar, and meteoritic chemistry to model fragmentation, energy deposition profiles, and radiative transfer through the atmosphere. Numerical simulations using codes developed at Los Alamos National Laboratory, Princeton University, ETH Zurich, and University of Colorado Boulder improved estimates of peak overpressure and casualty risk from similar events. Studies published in journals involving researchers from Nature, Science, Geochimica et Cosmochimica Acta, and Meteoritics & Planetary Science refined our understanding of small‑body mechanical strength, entry physics, and atmospheric interaction relevant to planetary defense.
Aftermath, response, and legacy
The incident accelerated investments in near‑Earth object surveys and planetary defense infrastructure by agencies such as NASA (including the DART and NEO survey efforts), ESA (funding for surveys and coordination), and international consortia like the International Asteroid Warning Network. It also influenced public awareness campaigns and emergency preparedness planning in regions prone to bolide airbursts, coordinated by organizations including Civil Defence agencies and academic outreach from Smithsonian National Air and Space Museum and university centers. The Chelyabinsk event remains a case study in observational coverage by ubiquitous cameras, interagency cooperation among Roscosmos, NASA, and European partners, and the practical need for improved survey completeness of the small‑to‑medium near‑Earth population.
Category:Meteors