Across
- 4. the point on the earth's surface directly above the place that an earthquake occured
- 7. tectonics a theory in geology the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates
- 9. wave a from of sound wave that travels away from the source of an earthquake. there are several types of seismic waves, but s-waves and p-waves are the most commonly measured and recognized
- 12. eruption when a volcano has a sudden occurrence of a violent discharge in which lava, tephra,or gases are released
- 13. chamber the underground space usually deep below the earth's surface occupied by magma that may ascend from it to or toward the surface
- 15. circular depression in the ground. it has steep sides and contains a volcanic vent
- 16. molten rock in the earth's crust
Down
- 1. a ripple wave produced by an earthquake. the s is from the lkalian segundo, indicating that s-waves arrived at seismic station after the p-waves
- 2. a fissure in the earth's crust through which gases erupt
- 3. the sudden motion or slip along a fault 2. the ground shaking that results from the release of seismic energy by 1 or by other means, such as the movement of magma beneath the surface of the earth
- 5. a compression wave produced by an earthquake. the p is from the ltalian primero,indicating that the p-waves were the first to arrive at seismic stations
- 6. the branch of science concerned with earthquakes and related phenomena
- 8. the place inside earth's crust where an earthquoke oringinates
- 9. the recording of the ground shaking at the specific location of the seismograph
- 10. a device that records and measures seismic wave like those from earthquahes
- 11. molten rock that issues from a volcano or from a fissure in the surface of a planet or moon
- 14. a vent is an opening in the earth's surface through which volcanic materials erupt.