Unveiling Earth’s magnetic secrets: paleomagnetism and its geological applications
By Hawaiian Volcano Observatory | Sunday, June 18, 2023, 12:05 a.m.
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Paleomagnetic secular variation curve for the past two thousand years. Label dates are mean ages before present (B.P.) or Anno Domini (AD), with gray circles indicating estimated error. Note that the magnetic field changes in declination (horizontal arched lines) and inclination (angled vertical lines) over time. Diagram is a section of an equal-area net where symbols indicate directions projected from the lower hemisphere. (Courtesy/photo)
Duane Champion (shown here on the left, with two coworkers) helped us to unlock Pele’s secrets by studying the magnetic properties preserved in lava flows. A good friend and valuable colleague, he greatly improved our ability to reconstruct past geological events using paleomagnetism. He will be missed. (Courtesy photo/usgs)