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Maurice Ewing

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Maurice Ewing was a pioneering American scientist who studied the mysteries of our planet. He was a geophysicist and an oceanographer. A geophysicist uses the laws of physics to study the Earth's structure and movement. An oceanographer studies the physical and biological aspects of the ocean. Known by his colleagues as "Doc," Ewing dedicated his life to understanding the Earth from its surface to its core. His research helped change how we understand the very foundation of our world.

Ewing developed many ways to observe things that are hidden deep underwater. He discovered the SOFAR channel, which is a layer in the ocean where sound travels very effectively. He also invented the "sofar bomb" to help study these underwater sounds. To see the ocean floor, he used deep water photography. This work was partly a hobby and partly used by the government to find ships lost to U-boats. He also studied seismic reflection and refraction in ocean basins. These methods involve using sound waves to map what lies beneath the sea floor.

His research covered many different scientific areas. He studied the theory and observation of earthquake surface waves to understand how the ground moves. He also investigated the fluidity of the Earth's core to see how it behaves. Ewing looked at the generation and propagation of microseisms, which are tiny earth tremors. He conducted marine gravity surveys and studied bathymetry, which is the measurement of ocean depth. He even examined the natural radioactivity found in ocean waters and sediments. His work on abyssal plains and submarine canyons helped map the deepest parts of the sea.

Ewing's academic journey began in Lockney, Texas. He was the eldest surviving child in a large farm family. He attended Rice University on a scholarship, earning his BA in 1926. He stayed at Rice for graduate studies, receiving his MA in 1927 and his PhD in 1931. He taught at the Rice Institute while finishing his doctorate. In 1930, he joined the faculty at Lehigh University. He was instrumental in starting a geophysics program there. In 1947, he moved to Columbia University as a professor of geology. By 1959, he was named the Higgins Professor of Geology at Columbia.

In 1949, Ewing founded the Lamont Geological Observatory. This center is now known as the Lamont–Doherty Earth Observatory (LDEO) in Palisades, New York. He worked there with many famous scientists. These included J. Lamar Worzel, Frank Press, Jack Nafe, and Jack Oliver. He also collaborated with oceanographic cartographers Marie Tharp and Bruce Heezen. Ewing was a very active researcher throughout his career. He led more than 50 oceanic expeditions and published over 340 scientific papers. He also served as president of the American Geophysical Union and the Seismological Society of America.

Ewing received many prestigious honors for his contributions to science. In 1973, he was awarded the National Medal of Science. He was elected to the National Academy of Sciences in 1948. He also became a Foreign Member of the Royal Society in 1972. Other awards included the Penrose Medal, which he received posthumously in 1974. He won the Gold Medal of the Royal Astronomical Society in 1964. His work was so significant that several awards were named after him. These include the Maurice Ewing Medals from the Society of Exploration Geophysicists and the American Geophysical Union.

His influence can still be seen in science today. A research vessel, the R/V Maurice Ewing, was named in his honor. On the moon, a wrinkle ridge named Dorsa Ewing bears his name. At the University of Texas Medical Branch, a building called Maurice Ewing Hall stands in his memory. His fundamental work helped support the theory of plate tectonics. This theory explains how the Earth's outer shell is divided into large plates. He also helped with Project Mogul, an early program to detect Soviet nuclear weapons tests. Even in space, his impact remains.

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In 1972, he was seen viewing seismometer readings from the Apollo 17 Saturn S-IVB stage impact on the moon.

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