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132 BCE
First seismocope
The earliest seismoscope was invented by Chinese philosopher, Chang Heng. -
Period: 132 BCE to
Seismology
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John Winthrop
Winthrop is one of the first to study earthquakes. -
Robert Mallet
Mallet is often referred to as the father of seismology due to his work. He developed the theory that earthquakes move outward from a central fixed point. -
Grove Gilbert
Gilbert discovers that earthquakes usually occur near a fault line. -
First seismograph
Fillippo Cecchi develops the first true seismograph in Italy. -
John Milne develops a seismometer
John Milne develops a seismometer. -
Mercalli intensity scale
Giuseppe Mercalli creates a scale that measures the likelihood of damage caused by an earthquake. The one below is a modified version by Harry O Wood and Frank Neumann in 1931. -
International recorded earthquake
A seismograph recorded a earthquake in Japan from Germany. -
The Great San Francisco Earthquake
The Great San Francisco Earthquake killed over 3,000 people even though it only lasted a minute. -
Moho boundary
Andrija Mohorovii discovers that there is a boundary between the Earth’s crust and mantle. -
The Richter Scale
Charles Richter creates the Richter Scale to determine the magnitude of earthquakes. -
Earths inner core
Inge Lehman discovers Earth’s inner core by studying seismic waves. -
The Great Chilean Earthquake
One of the worst earthquakes ever recorded, earning a 9.1 on the Richter scale, was recorded in the city of Valdivia, Chile.