Moonquakes discovered in data from 1970s Apollo mission

日期:2019-03-02 03:20:12 作者:祖助骢 阅读:

IT WAS there all along, but it took until now for a computer to spot it – the signature of moonquakes, hiding in seismic data from a 1970s moon landing. The technique behind the find may soon help spot tremors on Mars, too. Seismometers left on the moon by the Apollo missions have recorded about 13,000 events: meteor strikes, deep quakes linked to the moon’s orbit around Earth, and powerful shallow quakes of unclear origin. Software trained by humans could find even more events, says Brigitte Knapmeyer-Endrun of the Max Planck Institute for Solar System Research in Göttingen, Germany. She and her team have developed an algorithm that can identify quakes with roughly the same pattern as a sample set picked out by researchers. When they set it to work on data from a seismometer left on the moon by Apollo 16 in 1972, they found 200 quakes that had eluded notice (Journal of Geophysical Research: Planets, The algorithm may be useful for NASA’s InSight lander, which aims to put a seismometer on Mars next year. InSight doesn’t have much bandwidth to send data back, so software could help determine which quakes warrant study, Knapmeyer-Endrun says. This article appeared in print under the headline “New moonquakes in decades-old data” More on these topics: