You should be able to notice things around you. If something unusual, such as a decrease in sea level rapidly. Is the alarm that is going to have a tsunami or behavior by an animal that has changed.
You should notice the things around you. If there is something wrong Such as a reduction in sea levels rapidly. As a warning sign that a tsunami would follow. Or behavior of animals has changed.
You should observe the things around you. If there is something unusual, such as the reduction of sea level quickly. An alarm that is a tsunami followed. Expression of animal behavior change.