Events
Zhang Heng of China designed the first known seismoscopeThe Lisbon earthquake led to a new era of modern earthquake studies, promoting the collection of data and scientific inquiryDavid Milne suggested that a machine could be created to measure seismic activityRobert Mallet discovered that earthquakes are caused by seismic waves and realized that damage is due to these wavesRobert Mallet proposed that earthquakes move outward from a central focal pointGrove Gilbert found out that earthquakes are centered around fault linesFilippo Cecchi built the first time-recording seismographA seismometer was tested and used for detectionThe first U.S. seismograph was installed at the Lick Observatory near San FranciscoThe San Francisco earthquake occuredHarry Reid hypothesized that earthquakes are caused by the buildup of pressure along faultsGiuseppe Mercalli developed the Mercalli Intensity Scale to measure the damage caused by an earthquake.Andijia Mohorovičić discovered the Moho boundary, between the Earth's crust and mantleCharles Richter developed the Richter scale to measure the magnitude of an earthquakeHiroo Kanamori proposed the moment magnitude scale to replace the Richter scale
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