2 minutes
about 2 min
there is an after shock
since they are dangerous like you
a tsunami
There is a big earthquake.
the most dangerous place is california
An earthquake in the ocean is dangerous than on land because in the ocean if it occurs it can generate an earthquake which can cause more destruction than an earthaquake on land
pretty dangerous; the earthquake in Haiti 2009 was a 7.7 magnetude quake, and that was powerful enough to destroy thousands of homes; so they can be life threatening.
It is very dangerous but a flood is an dangerous attack as well as a hurricane.
both
Earthquake itself is not dangerous if you know how to response. as long as you are on the right place, for example on an open place or inside seismic resistant buildings, etc you will be fine. Many people killed during earthquake because of panic and do wrong thing. tsunami triggered by underwater earthquake and off course more more more dangerous than earthquake. for example if there is no tsunami in sendai, miyagi, iwate area (march 11, 2011) the people killed will be not so significant. tsunami is the most dangerous natural disaster in the world.