Roberto Gorelli points our attention at a recently published meteor related paper.

Observational Signatures of Sub-Relativistic Meteors

This paper has been submitted for publication by Amir Siraj and Abraham Loeb

Abstract: It is currently unknown whether solid particles larger than dust from supernova ejecta rain down on Earth at high speeds. We develop a hydrodynamic and radiative model to explore the detectability of >~ 1 mm sub-relativistic meteors. We find that a large fraction of the meteor energy during its passage through the Earth’s upper atmosphere powers the adiabatic expansion of a hot plasma cylinder, giving rise to acoustic shocks detectable by infrasound microphones. Additionally, a global network of several hundred all-sky optical cameras with a time resolution of . ~<10^−4 s would be capable of detecting >~ 1 mm sub-relativistic meteors.

You can download this paper for free: (10 pages).