earthquakes are probably the biggest threat regarding natural disasters in indonesia as they come sudden and can strike in populous areas,such as the bigger Cit

earthquakes are probably the biggest threat regarding natural disasters in indonesia as they come sudden and can strike in populous areas,such as the bigger Cities.earthquakes with a magnitude of around five or six on the scale of Richter happen almost on a daily basis in indonesia but usually cause no or little damage.when the magnitude becomes over seven on the scale of Richter,an earthquake can potentially do a lot of damage.yearly,two or three earthquakes with a magnitude of seven or higher occur in indonesia and cause casualties and damage the infrastructure or environment.the high number of indonesian cadualities is partly inflicted by the bad state of some housing facilities and infrastructure.this is why a moderate earthquake can in fact result in many casualities,the collapse of many buildings and the displacement of many people.a world bank publication (in october 2010) expressed its concern about the devastating effects an 8.5 magnitude earthquake can have if it happens in a mega-city such as jakarta.
pertanyaannya:
1.when the earthquake can potentially do a lot of damage?
2.what are the damagescaused by an earthquake with a higher magnitude in indonesia?