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History of Seismology
Main
First seismoscope developed in China
132 BC
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David Milne coined the name "seismometer".
1841
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Robert Mallet studied and developed theories about earthquakes
March 27, 1857
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He thought earthquakes moved outward from a central focal point.
Grove Gilbert discovered that earthquakes usually occur around a fault line
May 4, 1872
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First seismometer invested by Fillippo Cecchi in Italy
1875
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Distant earthquake recorded for the first time
1889
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The earthquake was in Japan and the recording was made in Germany,
John Milne develops a seismometer
1892
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This seismometer is installed in approximately 40 observatories beginning the global earthquake monitoring.
First seismograph installed in the U.S.
1897
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Richard Oldham discovers Earth's core by studying seismic waves
1906
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Andrija Mohorovicic discovers the moho discontinuity.
1909
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Moho discontinuity is the boundary between the Earth's crust and mantle.
Charles Richter develops the magnitude scale
1935
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Inge Lehmann discovers the Earth's inner core
1936
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A nuclear explosion is recored by a seismograph
1946
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Largest recored earthquake in Chile
1960
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M=9.5
The World Wide Standardized Seismic Network is established.
1961
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Keitti Aki defines seismic moment.
1966
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Apollo astronauts place a seismometer on the moon
1969
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first moon quakes are registered
http://science.nasa.gov/media/medialibrary/2006/03/15/15mar_moonquakes_resources/A11setup5_med.jpg
Hiroo Kanamori establishes the moment magnitude scale.
1977
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The Comprehensive Nuclear Test Ban Treaty is established
1996
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signed by 174 countries