Volcanic activity, or other geologic processes, may cause stress changes in the earth that can also result in an earthquake.
(Volcanic activity, or other geologic processes; may cause; stress changes in the earth that can also result in an earthquake) (stress changes in the earth; can also result; in an earthquake)
Volcanic activity, or other geologic processes stress changes in the earth
may cause can also result
stress changes in the earth that can also result in an earthquake
in an earthquake