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What is a seismograph? OR With which instrument are seismic waves measured? भूकंपलेखी क्या है? अथवा भूकंपीय तरंगों को किस यंत्र से मापा जाता है ?
Seismic waves are measured with a seismograph. An instrument called ‘seismograph’ records the waves reaching the surface.Seismograph
भूकंपीय तरंगों को भूकंपलेखी यंत्र से मापा जाता है। 'सीस्मोग्राफ' नामक उपकरण सतह पर पहुंचने वाली तरंगों को रिकॉर्ड करता है।