A model predicted the tsunami wave height from a Jan. 8, 1817, earthquake offshore South Carolina. The earthquake’s magnitude was estimated at 7.4 from newspaper accounts.
January 8, 1817: Tsunami on the Delaware Estuary. New geological modeling has suggested that a magnitude 7.4 earthquake occurred off of South Carolina in 1817. The resulting tsunami tossed boats around on the Delaware Estuary south of Philadelphia according to newspaper reports at the time.
“The size and location, or epicenter, of the 1817 earthquake has never been pinned down so closely before. U.S. Geological Survey research geophysicist Susan Hough and her colleagues zeroed in on the source from newly uncovered archival records, looking at where the shaking was strongest. But they weren’t sure about the tsunami link: The 11 a.m. arrival time seemed too late for a 4:30 a.m. earthquake. So they created a computer model of the tsunami, testing different locations and magnitudes. The best fit to force a
foot-high (30 centimeters) wave up the mouth of Delaware Bay by about 11 a.m. was a magnitude-7.4 earthquake offshore of South Carolina.
‘That was the eureka moment,’ Hough told Live Science’s Our Amazing Planet. ‘Darned if that wave doesn’t hit the Delaware River and slow way down.’
The foot-high tsunami wave started about 800 miles (1,300 kilometers) south of Delaware Bay and 400 to 500 miles (650 to 800 km) offshore of South Carolina, according to the study, published in the September/October issue of the journal Seismological Research Letters….
No obvious culprit jumps out of the seafloor topography, such as a linear feature that could be an earthquake-causing fault, Hough said. But according to ship records, the sea above the temblor’s likely epicenter trembled for several years. Earthquakes can be felt at sea, and ship captains reported shaking before and after Jan. 8, 1817, that could have been foreshocks and aftershocks, the researchers said. Ships in the area also rocked or shook from earthquakes in 1858, 1877 and 1879.”
January 8, 1957: Death of Charles-Edward A. Winslow. “Charles-Edward Amory Winslow (4 February 1877 – 8 January 1957) was an American bacteriologist and public health expert who was, according to the Encyclopedia of Public Health, “a seminal figure in public health, not only in his own country, the United States, but in the wider Western world.”
Winslow was born in Boston, Massachusetts and attended Massachusetts Institute of Technology (M.I.T.), obtaining a B.S. in 1898 and an M.S. in 1910.
He began his career as a bacteriologist. He met Anne Fuller Rogers when they were students in William T. Sedgwick’s laboratory at M.I.T., and married her in 1907. He taught at the Massachusetts Institute of Technology while heading the sewage experiment station from 1908 to 1910, then taught at the College of the City of New York from 1910 to 1914.
He was the youngest charter member of the Society of American Bacteriologists when that organization was founded in 1899. With Samuel Cate Prescott he published the first American textbook on the elements of water bacteriology.
In 1915 he founded the Yale Department of Public Health within the Yale Medical School, and he was professor and chairman of the Department until he retired in 1945. (The Department became the Yale School of Public Health after accreditation was introduced in 1947.) During a time dominated by discoveries in bacteriology, he emphasized a broader perspective on causation, adopting a more holistic perspective. The department under his direction was a catalyst for health reform in Connecticut. He was the first director of Yale’s J.B. Pierce Laboratory, serving from 1932 to 1957. Winslow was also instrumental in founding the Yale School of Nursing.
He was the first Editor-in-Chief of the Journal of Bacteriology, serving in that position from 1916 to 1944. He was also editor of the American Journal of Public Health from 1944 to 1954. He was curator of public health at the American Museum of Natural History from 1910 to 1922. In 1926 he became president of the American Public Health Association, and in the 1950s was a consultant to the World Health Organization.”