Ele Willoughby, PhD on Nostr: Another without a known birthday: my #linocut of ancient Chinese Han Dynasty ...

Another without a known birthday: my #linocut of ancient Chinese Han Dynasty #polymath & statesman Zhang Heng (78-139) who invented a seismoscope (simplified seismometer which doesn’t make a record of earth motions) to detect distant earthquakes & indicate their direction, 2000 years ago! Here with a reconstruction of his seismoscope, schematic of how it might have worked & horizontal earthquake surface waves (Rayleigh waves🧵

#histsci #printmaking #ZhangHeng #EarthScience #seismology #MastoArt