Most of the material moved by volcanoes is from the few, big ones rather then from the many, little ones. most of the material moved downhill in landslides is in the many, little ones rather than the few, big ones. in comparing the importance of the few, big earthquakes to the many, little earthquakes, are earthquakes more like volcanoes (the few big ones matter most) or like landslides (the many little ones matter most)?