The expected frequency of collisions of smallmeteorites with cars and aircraft

Planetary Seismology

“…In the case of the Moon and Earth, and more generally for the terrestrial planets (Le Feuvre and Wieczorek, 2008), the frequency and size of impactors can be obtained using the statistical properties of the Earth-crossing asteroids (e.g., Poveda et al, 1999) and collision rates (e.g., Brown et al, 2002;Shoemaker et al, 1990). Such an approach allows for the modeling of impact frequencies on terrestrial planets that can then be calibrated to the lunar impact-generated seismic noise, using the ALSEP seismic data .…”

“…This effect can be assessed by integrating the impactor equation in the atmosphere (Chyba et al, 1993;Poveda et al, 1999):…”

“…Vertical lines provide the impulse values for the Apollo artificial impacts (see Gudkova et al, 2011) and density of small craters (Richardson et al, 2004). As the frequency of impacts is typically a power law function of diameter, with a power law exponent of À5/2 (e.g., Poveda et al, 1999) (and hence a power-law function of mass, with exponent À5/6), accelerations 10 6 times smaller (in the range of 1-100 ng) will occur at a rate 10 5 times higher at 1 AU, and possibly even higher rates will occur at longer distances from the Sun. This translates into rates of hundreds of events per year, which could possibly be recorded by space-qualified SP seismometers.…”

Planetary Seismology

“…In the case of the Moon and Earth, the frequency and size of impactors can be obtained using statistical properties of the Earth-crossing asteroids (ECAs, e.g. Poveda et al 1999) and of the collision rates (e.g., Shoemaker et al 1990). Figure 16 shows the frequency distribution of impactors as a function of seismic impulse, for the lunar cross section.…”

Asteroid impact in the Black Sea. Death by drowning or asphyxiation?

“…Swiss Reinsurance (CF) and Munich Reinsurance Company (FRG) researchers are trying to calculate the pay-off costs ensuing from small and large asteroid impacts upon human infrastructures-the risk assessors are monitoring science periodicals to provide data that will enable them to devise mathematical models putting a price tag on unforeseen tragedies (Poveda et al 1999). Scientists, too, seek to assess the damage to infrastructures from asteroid impacts (Remo 1998).…”