What is the "artificial earthquake"？
"Artificial earthquake" is not the thing which took place naturally.
The earthquake was made artificially.
Why will an artificial earthquake happen?
I expected it.
＜Case 1＞ To check the underground state of the place
This is a newspaper article of July, 2011.
(There is a letter of "the artificial earthquake","Structure
analysis" in this article.)
●Purpose To measure an earthquake wave and analyze underground structure.
●Method With a dynamite, an earthquake is caused intentionally.
＜Case２＞ Influence by public works
●Purpose To destroy an interfering building or rock by a blasting charge.
●Method To use the gunpowder such as dynamites.
※In this case the artificial earthquake is not intentional and gets up
It is necessary to consider it to suppress vibration and the noise if possible.
＜Case３＞ Influence by the nuclear test
（Example） May, 2009 Underground nuclear test by North Korea
→ The Korean Meteorological Agency observed an earthquake of M4.5
●Purpose To make a higher-performance nuclear weapon
●Method To set off a nuclear bomb experimentally and analyze performance
※ In this case "the earthquake" is a by-product.
The original purpose is a performance investigation into nuclear bomb.
By the way, a treaty named "ENMOD" exists.
＞＞ Environmental Modification Convention (ENMOD)