M5.8 hit Fukushima offshore / 2 more major quakes in close area

A major earthquake hit Fukushima offshore at 18:30 of 12/20/2014 (JST) according to Japan Meteorological Agency. Magnitude was 5.8.

The depth of epicenter was 40km. The maximum seismic intensity was 4.

Tepco announced no abnormality was found in plant parameter. They reported the maximum readings of seismometers in Fukushima Daiichi plant and Daini plant however the readings of Daiichi were smaller than Daini for some reason.

 

Daiichi (Measured in Reactor 6)

Horizontal : 12.7 gal

Vertical : 9.1 gal

 

Daini

Horizontal : 20.8 gal (Measured in Reactor 3)

Vertical : 13.4 gal (Measured in Reactor 4)

 

Additionally, M4.4 occurred Miyagi offshore 20 minutes after the M5.8. About 1 hour later, M4.8 happened Sanriku offshore.

3 major quakes occurred in the close areas within 2 hours. At this moment, Japan Meteorological Agency hasn’t made any announcement.

 

↓ The epicenter of the first quake (M5.8)

M5.8 hit Fukushima offshore : 2 more major quakes

 

↓ The epicenter of the second quake (M4.4)

2 M5.8 hit Fukushima offshore : 2 more major quakes

 

↓ The epicenter of the third quake (M4.8)

3 M5.8 hit Fukushima offshore : 2 more major quakes

 

http://www.jma.go.jp/en/quake/20141220183511395-201830.html

http://www.jma.go.jp/en/quake/20141220185412395-201850.html

http://www.jma.go.jp/en/quake/20141220200113395-201956.html

http://www.tepco.co.jp/cc/press/2014/1244983_5851.html

http://www.jma.go.jp/en/quake/quake_local_index.html

 

 

_____

Français :

Un M5,8 au large de Fukushima : 2 autres séismes majeurs dans la région proche

 

Un séisme majeur a frappé au large de Fukushima le 20 décembre 2014 à 18:30 (JST), selon la Japan Meteorological Agency. Sa magnitude était de 5,8.

La profondeur de l’épicentre était de 40 km. L’intensité sismique maximale a été de 4.
Tepco a déclaré qu’il n’y avait eu aucune anomalie relevée dans les paramètres de la centrale. Ils ont donné les lectures records des centrales de Fukushima Daiichi et de Daini, les relevés de Daiichi seraient moins élevés que ceux de Daini.

Daiichi (au réacteur 6)
Horizontal : 12.7 gal
Vertical : 9.1 gal

Daini
Horizontal : 20.8 gal (au réacteur 3)
Vertical : 13.4 gal (au réacteur 4)

EN outre, un M4,4 s’est produit au large de Miyagi 20 minutes après le M5,8. Environ 1 heure plus tard, un M4,8 s’est produit au large de Sanriku.
3 séismes majeurs se sont produits en 2 heures dans la même zone. Pour l’instant la Japan Meteorological Agency n’a fait aucun communiqué.

↓ L’épicentre du premier séisme (M5,8)

M5.8 hit Fukushima offshore : 2 more major quakes

↓ L’épicentre du second séisme (M4,4)
2 M5.8 hit Fukushima offshore : 2 more major quakes

↓ L’épicentre du troisième séisme (M4,8)
3 M5.8 hit Fukushima offshore : 2 more major quakes

http://www.jma.go.jp/en/quake/20141220183511395-201830.html
http://www.jma.go.jp/en/quake/20141220185412395-201850.html
http://www.jma.go.jp/en/quake/20141220200113395-201956.html
http://www.tepco.co.jp/cc/press/2014/1244983_5851.html
http://www.jma.go.jp/en/quake/quake_local_index.html

About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.

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