in the form As tectonic plates move across the Earth, stress builds up. This str
ID: 117001 • Letter: I
Question
in the form As tectonic plates move across the Earth, stress builds up. This stress is released of earthquakes, which occur around the world every day. We can use the location and magnitude of earthquakes to learn more about plate boundaries. Go to the USGS "Latest Earthquakes" map: https /learthquake.usgs.gov/earthquakes/map/ The map is preset to show earthquakes in the past 24 hours of magnitude 2.5 or greater 16. When and where in the conterminous United States (the lower 48 states) was the most recent earthquake of magnitude 2.5 or greater? What was its magnitude? 17. How many total earthquakes occurred in the conterminous United States in the past 24 hours? 18. Zoom out to the world view. How many earthquakes occurred globally in one day? Click the "show legend" button at the bottom. Using the settings button (gear in upper right) to change to 7 days and adjust the magnitude. 19. How many earthquakes of all magnitudes occurred over the last seven days? How many with magnitudes greater than 4.5 What can you say about the relationship between the magnitude of earthquakes and their frequency? 20.
Explanation / Answer
16. 15km N of Cherokee, Oklahoma of magnitude 3.3
17. A total of 6 earthquakes occured in past 24 hrs.
18. A total of 40 earthquakes occured globally in one day.
19. A total of 1923 earthquakes took place in globally in last 7 days. A total of 111 earthquakes of magnitude 4.5 or above occured.
20. Magnitude of earthquake and frequency are inversely proportional according to this map because the frequency of higher magnitude earthquakes is more whereas lower magnitude earthquakes are more frequent.
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