The theory suggests that you can hit a solid object and waves of energy will travel through the object and cause movement, through to be the cause of earthquakes
Fiats person to study an earthquake
David Milne first suggested that a machine could be used to measure seismic activity
It was build by F.Cecchi in Italy
It was installed in an observatory in San Jose, California. It recorded the 1906 San Fransisco's earthquake.
Major earthquake caused by San Andreas fault. Killed about 3,000 people.
Giuseppe Mercalli was the first person who created a seismograph but it wasn't very accurate so they turned it into a device that measures how much damage an earthquake can do.
Andrija Mohorovii discovered a boundary between the Earths crust and the mantle, this boundary helped better understand Earths interior
B. Gutenburg publishes Time Travel Tables that include seismic waves that reflect from the core and accurately estimates the depth of the Earths fluid core.
Charles Ritcher made the first accurate seismograph known as the Ritcher Scale to determine the earthquakes magnitude.