Study about earthquakes is known as:

If the word seismology is read by breaking it then it means  earthquake + study i.e. to read or know about an earthquake. Before an earthquake occurs, seismic waves arise from the earth, after which an earthquake happens. In seismology, we read about these seismic waves. The device that catches these seismic waves is named seismography. But if we look at other options, then Astrology means getting knowledge about stars Geology and Zoology provides information about biology subject of science.