Sangeetha Pulapaka

Interesting question! It is like wanting to know which is more powerful (to get the job done) mom's anger or mom's love? I am no expert in either, but I will try to answer this the best way I can.

 Volcanoes: Generally speaking, scientists can predict with a relatively good degree of certainty when a volcano will erupt. This is because most volcanoes follow a regular pattern of increasing seismic activity as the eruption approaches, usually in the form of small earthquakes.  

Earthquakes: On the other hand, earthquakes have proven to be notoriously difficult to predict because of the lack of regular patterns - sometimes they are preceded by a series of small earthquakes, and other times not. Scientists measure the severity of an earthquake on a (modified) Richter scale, where an increase of 1 unit represents 10 times more ground motion and 30 times more energy released. A magnitude 5 earthquake will be felt by most people in the vicinity, but do little damage to well-made buildings. A magnitude 7-8 earthquake will do major damage. An earthquake  larger than a magnitude 9 has also been recorded in Chile in 1960. The motion that this Richter scale measures is due to seismic waves that are generated at the center and subsequently travel through the Earth. Much like the use of radiation (electromagnetic waves) that are used in medicine to diagnose diseases, the way that these waves travel through the Earth can tell us a great deal of the structure of the inner Earth.

Earthquakes often occur in densly populated areas, whereas volcanoes are more synonymous with mountainous terrain. Both destroy life and distrupt peace. Here is some more info on this!