The rate of small impacts on Earth

@article{Bland2006TheRO,
  title={The rate of small impacts on Earth},
  author={Philip A. Bland and N. Artemieva},
  journal={Meteoritics \& Planetary Science},
  year={2006},
  volume={41}
}
  • P. BlandN. Artemieva
  • Published 1 April 2006
  • Geology, Environmental Science, Physics
  • Meteoritics & Planetary Science
Abstract— Asteroids tens to hundreds of meters in diameter constitute the most immediate impact hazard to human populations, yet the rate at which they arrive at Earth's surface is poorly known. Astronomic observations are still incomplete in this size range; impactors are subjected to disruption in Earth's atmosphere, and unlike the Moon, small craters on Earth are rapidly eroded. In this paper, we first model the atmospheric behavior of iron and stony bodies over the mass range 1–1012 kg… 

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The impact rate on Earth

  • P. Bland
  • Geology, Environmental Science
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2005
Estimates of the size-frequency distribution for terrestrial impactors, from meteorite-sized objects up to kilometre-sized asteroids, for both the upper atmosphere and the Earth's surface allow us to constrain the threat posed by impacts to human populations.
...

References

SHOWING 1-10 OF 111 REFERENCES

Efficient disruption of small asteroids by Earth's atmosphere

It is shown that the separated-fragments model predicts the total atmospheric disruption of much larger stony bodies than previously thought, and it is estimated that bodies >220 m in diameter will impact every 170,000 years.

The flux of small near-Earth objects colliding with the Earth

Satellite records of bolide detonations in the atmosphere over the past 8.5 years are reported and it is found that the flux of objects in the 1–10-m size range has the same power-law distribution as bodies with diameters >50 m.

A reduced estimate of the number of kilometre-sized near-Earth asteroids

An analysis of the survey for near-Earth asteroids that uses improved detection technologies finds that the total number of asteroids with diameters > 1 km is about half the earlier estimates.

Crater fields on Venus, Earth and Mars.

Introduction: Meteoroids that are disrupted and dispersed in the atmosphere may give rise to crater fields at the surface. For lower mass objects fragmentation may produce a strewn field of meteorite

Asteroid Impact Tsunami: A Probabilistic Hazard Assessment

Abstract We investigate the generation, propagation, and probabilistic hazard of tsunami spawned by oceanic asteroid impacts. The process first links the depth and diameter of parabolic impact

Long-term variations in the impact cratering rate on Earth

  • E. Shoemaker
  • Geology, Physics
    Geological Society, London, Special Publications
  • 1998
Extended abstract Lunar and terrestrial impact craters, the terrestrial stratigraphic record of impact events, and astronomical observations of Earth-crossing asteroids and comets provide the primary

ASTEROID AND COMET BOMBARDMENT OF THE EARTH

Two classes of solid bodies large enough to be detected by telescopes occur in orbits that overlap that of the Earth. These bodies are the Earth-crossing asteroids and comet nuclei. Although their

The Near-Earth Asteroid Size–Frequency Distribution: A Snapshot of the Lunar Impactor Size–Frequency Distribution

Abstract It is shown that the size–frequency distribution (SFD) of a time-averaged projectile population derived from the lunar crater SFD of Neukum and Ivanov (in Hazards Due to Comets and Asteroids

The size distribution of the earth-approaching asteroids

The discovery circumstances of the first asteroids ever observed outside the earth's atmosphere but within the neighborhood of the earth-moon system are described. Four natural objects with diameters
...