Signals from Earth


Nature 514, 538 (30 October 2014) doi:10.1038/514538d


Radio pulses that look like they came from deep space could actually have earthly origins.
A team led by Pascal Saint-Hilaire at the University of California, Berkeley, detected five short but intense radio bursts at the Bleien Radio Observatory in Switzerland. This is only the second location at which such pulses have been detected, and their origins are still unclear. Characteristics of the radio waves suggest that they were stretched after passing through vast amounts of plasma — usually indicating an origin outside of the Milky Way, such as exploding stars in other galaxies.
However, the pulses were detected only when the antenna was in a mode susceptible to ground interference, and all but one pulse occurred in the late morning. This suggests that the signals could actually be coming from sources on Earth.

Saint-Hilaire P. & C. Monstein (2014). SHORT-DURATION RADIO BURSTS WITH APPARENT EXTRAGALACTIC DISPERSION, The Astrophysical Journal, 795 (1) 19. DOI: (arXiv)


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.