* Astronomy

Seismic sensors recorded two events minutes apart at the time Kincardine-area fire departments and police were swamped with calls that an explosion had occurred in the area, earthquake experts said yesterday.
But Earthquake Canada seismologists say it will take more analysis to determine what caused the events shortly after 11 p.m. on July 31 near Goderich.
The first event was recorded by seismic sensors at 11:01.22 p.m. and had a magnitude of 1.4 at a depth of one kilometre.
The estimated location is in Lake Huron in Canadian waters west of Point Clark, but not far from the Canada-U.S. border.
If it was an earthquake, it is unlikely it would have been felt by anyone, seismologists said.
But there was a second event captured by the seismic recorders at 11:07 p.m., said Earthquake Canada seismologist Catherine Woodgold.

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