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A reactor at the Fukushima Daiichi nuclear power plant melts and explodes and releases radioactivity into the atmosphere

A reactor at the Fukushima Daiichi nuclear power plant melts and explodes and releases radioactivity into the atmosphere a day after Japan's earthquake.

Fukushima Daiichi is 1 of 2 multi-reactor nuclear power sites in the Fukushima Prefecture of Japan. A nuclear disaster occurred there after a 9.0 magnitude earthquake and subsequent tsunami on 11 March 2011. The earthquake triggered a scram shut down of the three active reactors, and the ensuing tsunami crippled the site, stopped the backup diesel generators, and caused a station blackout. The subsequent lack of cooling led to explosions and meltdowns, with problems at three of the six reactors and in one of the six spent-fuel pools.

Times are given in Japan Standard Time (JST), unless noted, which is UTC plus nine hours.

Historical Significance

Fukushima Daiichi is 1 of 2 multi-reactor nuclear power sites in the Fukushima Prefecture of Japan.

Events Before

  1. New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cov

    New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cover from the waist to knee, and women's from shoulder to knee; fabric must be a "textile" or woven material

  2. Earthquake devastates Haiti, killing an estimated 100,000 to 160,000 people and destroying the majority of the capital P

    Earthquake devastates Haiti, killing an estimated 100,000 to 160,000 people and destroying the majority of the capital Port-au-Prince

  3. "Easy Rider" director and actor Dennis Hopper (73) divorces his fifth wife Victoria Duffy due to irreconcilable differen

    "Easy Rider" director and actor Dennis Hopper (73) divorces his fifth wife Victoria Duffy due to irreconcilable differences and out-of-control spending

  4. Infanta Elena, Duchess of Lugo (46) divorces Lord of Tejada, Jaime de Marichalar (46) after 15 years of marriage

    Infanta Elena, Duchess of Lugo (46) divorces Lord of Tejada, Jaime de Marichalar (46) after 15 years of marriage

  5. Alexandre Bilodeau wins the gold medal in the freestyle skiing men's moguls event, becoming the first Canadian to win go

    Alexandre Bilodeau wins the gold medal in the freestyle skiing men's moguls event, becoming the first Canadian to win gold during an Olympic Games hosted in Canada

Events After

  1. Actress Parminder Nagra files for divorce from photographer James Stenson due to irreconcilable differences after 3 year

    Actress Parminder Nagra files for divorce from photographer James Stenson due to irreconcilable differences after 3 years of marriage

  2. American actor Dick Van Dyke (86) weds second wife, American make-up artist Arlene Silver (40) in Malibu, California

    American actor Dick Van Dyke (86) weds second wife, American make-up artist Arlene Silver (40) in Malibu, California

  3. "Twilight" actor Peter Facinelli (38) divorces "Beverly Hills 90210" actress Jennie Garth (39) due to irreconcilable dif

    "Twilight" actor Peter Facinelli (38) divorces "Beverly Hills 90210" actress Jennie Garth (39) due to irreconcilable differences after 11 years of marriage

  4. Actress and model Heidi Klum (39) divorces British soul and R&B singer-songwriter Seal (49) due to irreconcilable differ

    Actress and model Heidi Klum (39) divorces British soul and R&B singer-songwriter Seal (49) due to irreconcilable differences after almost seven years of marriage

  5. "The Lion King" becomes highest grossing Broadway show, overtaking "The Phantom of the Opera"

    "The Lion King" becomes highest grossing Broadway show, overtaking "The Phantom of the Opera"

More from the 2010s

New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cov

New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cover from the waist to knee, and women's from shoulder to knee; fabric must be a "textile" or woven material

10 people are killed, and 120 are injured in a stampede in Luanda, Angola

10 people are killed, and 120 are injured in a stampede in Luanda, Angola

Dutchman Michael van Gerwen wins his first PDC World Darts Championship, defeating Peter Wright of Scotland 7-4; it is t

Dutchman Michael van Gerwen wins his first PDC World Darts Championship, defeating Peter Wright of Scotland 7-4; it is the first time no Englishman has been in the final

Lithuania adopts the euro as its currency, replacing the Litas and becoming the 19th member of the Eurozone

Lithuania adopts the euro as its currency, replacing the Litas and becoming the 19th member of the Eurozone

Frequently Asked Questions

What happened on March 12, 2011?
Fukushima Daiichi is 1 of 2 multi-reactor nuclear power sites in the Fukushima Prefecture of Japan. A nuclear disaster occurred there after a 9.0 magnitude earthquake and subsequent tsunami on 11 March 2011. The earthquake triggered a scram shut down of the three active reactors, and the ensuing tsunami crippled the site, stopped the backup diesel generators, and caused a station blackout.
Why is A reactor at the Fukushima Daiichi nuclear power plant melts and explodes and... significant?
Fukushima Daiichi is 1 of 2 multi-reactor nuclear power sites in the Fukushima Prefecture of Japan.

Explore More

March 12 in HistoryYear 2011