ACROSS

1. An instrument that records direction, intensity, and duration of earthquakes.
2. To an extreme degree.
3. A narrow and long extension of the sea that has steep cliffs as it's borders.
4. A rock formation with a fracture in it.
5. An intense wavelike movement.
6. Intense vibrations that occur in the earth's crust.
7. A massive sea wave brought on by an undersea volcanic eruption or seaquake.
8. A large overflow or flow of water that often occurs on land.

DOWN

1. The great size of something.
2. Lesser shock after the main shock of an earthquake.
3. The act of providing notice or caution.
4. A long, narrow area that moves water from one place to another.
5. A catastrophic event, often resulting in loss of life and property.
6. The main area where activity occurs.