Development of seismology

David Milne

Mar 22, 1840

David Milne came up with the idea of a machine that could measure seismic activy.

Robert Mallet

Mar 22, 1857

Robert Mallet proposed the theory that earthquakes moved outward from a main point, or focus.

Grove Gilbert

Mar 22, 1872

Grove Gilbert made the discovery that earthquakes happen on a fault line.

First U.S seismograph

Mar 22, 1897

Giuseppe Mercalli

Mar 22, 1906

Made a machine that measured the intensity of an earthquake.

Harry Reid

Mar 22, 1906

Harry Reid made a hypotheses that earthquakes were caused by built up pressure on faults.

Andrija Mohorovii

Mar 22, 1909

Andrija Mohorovii the Moho boundary, a boundary between the Earths crust and the mantle

Charles Richter

Mar 22, 1935

Charles Richter created the Richter scale, a scale that measures the intensity of earthquakes.