# data[].attributes.body
1841

Wrote about Forbes' invention referring to it as "the worst machine there ever was." From there he comes up with the term seisometer, a machine to measure seismic activity

# data[].attributes.body
1857

After the 'Great Neapolitan' earthquake struck Mallet began finding data and descriptions about earthquakes. He used maps, diagrams, and photographs in his publication to come up with the first theory of seismology.

# data[].attributes.body
1872

Discovered after exploring the Wheeler Surveys that earthquakes occurred around fault lines instead of folding. This idea was not widely accepted at the time and many even challenged it.

# data[].attributes.body
1890

The first seismograph that recorded earthquakes was developed.

# data[].attributes.body
1906

Italian seismologist who contributed to the creation of the earthquake intensity scale. This measured the damage that earthquakes caused.

# data[].attributes.body
1906

A professor at John Hopkins University, Reid examined how the ground was displaced after an earthquake. He concluded that an earthquake must have an "elastic rebound" that previously stored elastic stress along the fault lines.

# data[].attributes.body
1909

Andrija Mohorovicic used advanced sesmographs to capture an earthquake that occured in 1909. The readings were faster than he had thought was possible. So this lead him to the conclusion that seismic waves had to travel though a deep part of the Earth (the mantle) whereas the slower waves had traveled through the crust. The boundary between the two, Earth's mantel and crust would later go on be named the Moho Boundary

# data[].attributes.body
1935

Charles Richter developed the "Richter Scale." This mathematical device compared the size and intensity of earthquakes. He modeled his scale off of the stellar magnitude scale used by astronomers, it quantified the star's luminosity. He substituted his measurements for ground vibrations in for the measurements of luminosity. This formulation was not entirely correct but he would later go on to create the correct table which allowed magnitudes to be calculated without the distance of the earthquake from the seismometer.