EARTHQUAKES The USGS Earthquake center (http://earthquake.usgs.gov/earthquakes/)
ID: 802825 • Letter: E
Question
EARTHQUAKES The USGS Earthquake center (http://earthquake.usgs.gov/earthquakes/) is an excellent source of earthquake information. The center’s scientists track earthquake activity worldwide and provide up to the minute information on seismic activity. Copy and paste the following URL into your internet browser. http://www.earthquake.usgs.gov/earthquakes/ Look at the USA map of earthquakes. You may also find it interesting to click on the animation to see up to date earthquake activity in the US.
Answer the following questions in the submission box and submit when done. Be sure to identify each question.
S 1) STATE the concept behind the website. (2 pt.)
E 2) ELABORATE on the concept: explain fully why certain areas (locations) have a much higher number of earthquakes than others. (2 pt.)
E 3) EXEMPLIFY the concept: locate, name, and describe the area of greatest concentration of earthquakes. (3 pt.) - I
4) Illustrate the concept: Using graphs, pictures, and/or tables, and text, describe the largest most recent earthquake; provide information on its magnitude, depth, and ecological & biological impacts to the region. (Do this by finding the World Lists of earthquakes on the same webpage and clicking on Magnitude 5+.) (3 pt.)
Explanation / Answer
Answer 1: The website is designed as a part of “Earthquake Hazard Reduction Program” with an aim to provide detailed and up to date information of earthquake event to prevent damages caused to life, property due to occurrence of earthquake.
Answer 2: The occurrence of many Earthquakes at certain places is due to the fact that earthquakes are found to occur at active plate margins i.e at the margin of plates related with subduction zone.
Answer 3: The majority of earthquakes which lies along Japan and its neighborhood. These lie across four major plates which are as mentioned hereunder:
Answer 4: The largest most recent earthquake has been registered from 31 Km SW of Pangyan, Philippines. The coordinates was 5.505°N 125.072°E.
The magnitude of earthquake was 6.9 and it was located at a depth of 26 Km.
There were no major ecological or biological effects of this event and this was not linked to any tsunami or other like events. The exposure to population in thousands has been shown in the enclosed graph.
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