December 18, 2007
Niagara Falls, 1911, Frozen almost solid, an occurrence documented only once more in 1848.
Buffalo Express newspaper wrote the article:
The Falls of Niagara can be compared to nothing but a mere mill dam this morning. In the memory of the oldest inhabitants, never was there so little water running over Niagara's awful precipice, as at this moment! Hundreds of people are now witnessing that which never has, and probably never may again be witnessed on the Niagara River.
Last night at 11 o'clock the factories fed from the waters of this majestic river were in full operation, and at 12 o'clock the water was shut off, the wheel suddenly ceased their revolutions, and everything was hushed into silence. Various are the conjectures as to the cause; the most reasonable of which is that Lake Erie must be making a grand delivery of ice, and this the mouth of the Niagara, although large, is not quite enough to take in the whole at once, and that the consequences are, back water.
December 17, 2007
December 16, 2007
A Jet From The Sun
What powers the solar wind? Our Sun is known to emit a powerful wind of particles with gusts that can even affect astronauts and satellites orbiting Earth. The cause of the solar wind has been debated for decades but is thought to be rooted in Alfvén waves generated by the ever changing magnetic field of the Sun. Newly released images from the Japanese Hinode satellite appear to bolster this hypothesis, imaging an average of 240 daily plasma jets that are excellent candidates to fuel the outwardly moving Alfvén waves. The jets and waves are themselves ultimately created by magnetic reconnection events, rapid events where lines of constant magnetic field suddenly move extremely rapidly, dragging electrons and protons along with them. On the image left, one such jet is visible in X-ray light. Bright spots show relatively energetic regions elsewhere on the Sun.
December 15, 2007
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