How community residence and authorities can prepare for an earthquake or volcanic eruptions and its aftermath?
I think that the community residents and authorities should make a project to prevent a disaster that an earthquake can cause.
They should signalize the ways from escape or to teach the people the places where they are sure. Then they have to make a project of what they have to make before, during and after the earthquake.
They have to prepare seeing what areas are exposed to be attack by a volcano disaster. They have to make tests to prove if the people are prepared to a volcano attack.