6.23: Geological Activity and Earthquakes- Challenge 3
- Page ID
- 5423
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- 1. How many seismic stations are needed to find the epicenter of an earthquake, and why?
- Three, because this is the minimum number of circles that will intersect at one point.
- 2. To find the epicenter of an earthquake, ___ seismograms are needed.
- three
- 3. The Richter Scale measures the magnitude of the ___ of an earthquake.
- largest jolt of energy
- 4. An increase of one integer in the moment magnitude scale means ___.
- thirty times more energy is released by an earthquake
- 5. In a ___ scale, each unit is an exponential increase over the previous unit.
- logarithmic
- 6. Small earthquakes that come before large ones are known as ___.
- foreshocks
- 7. Geologists cannot predict earthquakes, because ___.
- they can't be sure when and where stress will be released along a fault.
- 8. Scientists can predict ___.
- the region in which an earthquake will occur
- 9. ___ occurs when an earthquake causes sediments to saturate with water and become quicksand-like in consistency.
- Liquefaction