May 13, 1998
LONDON (Reuters) - Following India's resumption of nuclear testing two days ago, two more ``sub-kiloton'' tests were carried out at the Pokhran test site Wednesday at 0651 GMT. It last conducted an underground nuclear test in May 1974 which it said was for its atomic energy program.
Here is a chronology of nuclear tests since the Non-Proliferation Treaty (NPT) was made permanent in 1995.
Many nations agree to make permanent the 25-year-old Non-Proliferation Treaty (NPT) on stopping the spread of nuclear weapons. A U.N. conference publicly approves indefinite extension of the 178-member agreement.
China conducts an underground nuclear test just days after the successful extension of the NPT treaty.
President Jacques Chirac announces France will resume nuclear weapons testing at its South Pacific site in September, setting off widespread protests throughout the area.
Hiroshima commemorates 50th anniversary of atomic bombing by the United States.
China's second underground nuclear test in five months provokes a world-wide storm of condemnation.
France conducts underground nuclear test on Mururoa Atoll, bringing worldwide condemnation and riot in Tahiti.
International Court of Justice in Hague rejects New Zealand bid to stop further French testing in South Pacific.
France conducts second blast of series at Fangataufa atoll, more than five times as powerful as the first. Sixteen-nation South Pacific Forum suspends ties with Paris. French commandos seize Greenpeace ship Manuatea in international waters off Mururoa.
France sets off third nuclear explosion equivalent to under 60 kilotonnes of TNT.
France carries out fourth test at Mururoa, equivalent to less than 40 kilotonnes of TNT.
France stages fifth test at Mururoa, equivalent to less than 30 kilotonnes of TNT.
France conducts sixth and most powerful test at Fangataufa, equivalent to under 120 kilotonnes of TNT.
Chirac announces an end to French nuclear tests.
France, Britain and the United States sign South Pacific Nuclear Free Zone Treaty.
Forty-three African states sign treaty declaring Africa free of nuclear weapons.
China carried out a nuclear explosion at the Lop Nor test site in northwestern Xinjiang province.
United Nations approves Comprehensive Test Ban Treaty (CTBT), which bans nuclear test explosions but not laboratory testing to refine nuclear weapons. India rejects treaty as flawed; Pakistan says it will not sign unless India does first.
United States begins a round of controversial underground nuclear weapons related tests in the Nevada desert.
The United States conducts a second underground explosive test on radioactive plutonium at a Nevada site.
France's National Assembly votes unanimously to ratify CTBT.
The U.S. Department of Energy announces it will begin a series of underground explosive tests on radioactive plutonium later in the month.
India conducts three underground nuclear tests in the Thar desert in the state of Rajasthan, close to India's border with Pakistan.