Pat Shingleton: "Timing Lightning and the Titanic..."
Saturday afternoon and evening could pose hearing problems for our pets. Claps of thunder are produced when the intense heat and lightning causes the air to expand. This sends a vibrating pressure or shock wave outward at the speed of sound. When a person, or a dog, is near a stroke of lightning, thunder is heard as a single sharp crack. At a distance, thunder can be heard as a continuous rumble as the sound waves move away from random points along the lightning stroke. If you count the seconds between the flash of lightning and the sound of thunder and divide that by 5, you will calculate, from your location, the approximate number of miles where the thunderclap occurred. On April 12, 106 years ago at 11:40 PM, the Titanic sank. Weather was never considered in the early stages of the investigation. Weatherwise Magazine's research noted that weather patterns in the winter and early spring of 1911-1912 were to blame for the ship’s demise. Changes in atmospheric pressure at sea level caused strong north winds that propelled the icebergs farther south than normal, placing them into the Titanic’s course. Iceberg season in the north Atlantic is April through July where more than 80 percent of the total number of icebergs cross south of latitude 48 north. In April, 1912, more than 900 icebergs floated in the North Atlantic.
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