Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Earthquakes
Exam 3
| Question | Answer |
|---|---|
| What is an earthquake? | Earth's surface shakes due to energy release following rapid movement of lithosphere along zones of weakness called faults |
| What is the focus of an earthquake? | Where the earthquake begins ; fault, underground |
| What is the epicenter of an earthquake? | Geographic location on Earth’s surface directly above the focus |
| What are P-waves? | Primary |
| What are S-waves? | Secondary |
| Which wave is compressional? | P-waves |
| Which wave is shear? | S-waves |
| When do P-waves arrive on a seismometer/seismogram? | 1st, they are the fastest |
| How do P-waves move? | Squeeze and contract (DO NOT LAUGH) |
| How do S-waves move? | Up and down (AGAIN, NO LAUGHING) |
| True or false: P-waves cannot move through liquid, while S-waves can | False! P-waves CAN move through solids and liquids, while S-waves CANNOT move through liquids |
| What are surface waves? | Make the SURFACE move up and down, or back and forth |
| When do S-waves arrive on a seismometer/seismogram? | 2nd |
| When do surface waves arrive on a seismometer/seismogram? | 3rd, they are the slowest |
| How do we determine the distance to an epicenter? | The difference in arrival times between the 3 stations |
| How do you triangulate an earthquake? | 3 stations = your epicenter, the difference in arrival stations tells you where it is, the overlapping area of the 3 stations tells you where the earthquake is |
| What is intensity? | Measure of effects of an earthquake on people and buildings (damage) ; uses roman numerals |
| What is magnitude? | Standard measure of shaking and/or energy release from an earthquake calculated using a seismogram |
| What can the amount of shaking depend on? | Magnitude, DISTANCE FROM FOCUS, GEOLOGY |
| What is liquefaction? | Occurs when water is released from saturated earth materials that are violently shaken ; think QUICKSAND |
| What is a tsunami? | Water displacement caused by slipping faults (or landslides or volcanic disruption) |
| What three things do you need to consider when assessing hazards? | Location, geology, and nearness to a fault |
| What aspects of location? | Population size/density, infrastructure |
| What aspects of geology? | Liquefaction risk, slopes (soft soil) |
Created by:
user-1965680