GEOLOGY

Previous
Next

EARTH SCIENCE

SEISMOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement is true about Earthquake frequency? More than one answer may be correct.
A
More weak earthquakes occur per year than strong.
B
On average, one Great Earthquake occurs per year.
C
Hundreds of earthquakes occur each year.
D
More strong earthquakes occur than Moderate.
Explanation: 

Detailed explanation-1: -The National Earthquake Information Center now locates about 20, 000 earthquakes around the globe each year, or approximately 55 per day.

Detailed explanation-2: -[3] From seismometric data we know that earthquakes generally radiate seismic waves mainly in the frequency range of 0.01 to 10 Hz, even if they can generate higher frequencies.

Detailed explanation-3: -On average, Magnitude 2 and smaller earthquakes occur several hundred times a day world wide. Major earthquakes, greater than magnitude 7, happen more than once per month. “Great earthquakes", magnitude 8 and higher, occur about once a year.

Detailed explanation-4: -It is estimated that around 500, 000 earthquakes occur each year, detectable with current instrumentation. About 100, 000 of these can be felt.

There is 1 question to complete.
Previous
Next