Why is it important to study prehistoric earthquakes?

 It is important to study prehistoric earth quakes because they want to be able to tell if they are recurring, how big the earth quakes are. and it could also help in the future to help locals  know how to plan for a event like so.  I'm sorry if I'm too late.. 

if you're in the Northern Hemisphere, look towards the southern skies to see the galactic core. This can be southeast (Spring), due south (Summer), or southwest (Fall) depending on the time of year. As mentioned above, Sagittarius is found nearest the galactic core.

Explanation: