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Earthquake - Tsunami - Nuclear Power Reactor [Copy link] 中文

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Post time 2011-3-16 10:42:06 |Display all floors
Earthquake in Pacific Ocean Nearby the coast of Japan

Location:
The epicenter in 2011-3-11 was reported to be 130 Kilometers off the coast of Japan
373 Kilometers Northeast of Tokyo, Japan


Tangshan Earthquake:
The Epicenter: Tangshan
100 Kilometers: the distance from Tangshan to Tianjin.
150 Kilometers: the distance from Tangshan to Beijing.

Wenchuan Earthquake:
The Epicenter: Wenchuan
21 Kilometers: the distance from Epicenter to Dujiangyan
75 Kilometers: the distance from Epicenter to Chengdu, the capital city of Sichuan province

Maybe we should compare the buildings in Chengdu during the earthquake with buildings in the coastal area of Japan. I think Chinese buildings is as good as Japanese buildings.

[ Last edited by 468259058 at 2011-3-16 01:24 PM ]

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Post time 2011-3-16 10:42:26 |Display all floors

Magnitude:

Magnitude: 8.9/9.0Mw

(Zhenji in Chinese Pinyin)

Originally posted by 468259058 at 2011-2-17 14:49
An earthquake is meansured in terms of its magnitude.(Richter magnitudes)
Less than 2.0 Micro Micro earthquakes, not felt.
About 8,000 per day

8.0 - 8.9 Great Can cause serious damage in areas several hundred miles across.
1 per year

9.0 - 9.9 Devastating in areas several thousand miles across.
1 per 20 years
...

bbs.chinadaily.com.cn/viewthread.php?gid=4&tid=689609&page=5&extra=page%3D1

[ Last edited by 468259058 at 2011-3-16 10:46 AM ]

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Post time 2011-3-16 10:42:49 |Display all floors

Seismic intensity scale:

Seismic Intensity: 7 in coastal area of Japan: Kurihara, Miyagi Prefecture.
Seismic Intensity: 6 in Fukushima, Ibaraki and Tochigi
Seismic Intensity: 5 in Tokyo (upper 5)

(Liedu in Chinese Pinyin)

Seismic Intensity 7: Throw by the saking and impossbile to move at will. (Japan)


There is 7 scales of Seismic Intensity in Japan.
There is 12 scales of Seismic Intensity in China.

Seismic intensity 7 in Japan is similiar to Seismic intensity 10~12 in China.

(Building Codes in China)
Almost all of buildings in urban area of Jinan are safe in the Seismic intensity 6.
Almost all of buildings in urban area of Beijing are safe in the Seismic Intensity 8.

Seismic intensity 6 in China is similiar to seismic intensity 4 in Japan.(Many people are frightened, some people try to escape from the danger.)

[ Last edited by 468259058 at 2011-3-16 01:11 PM ]

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Post time 2011-3-16 10:46:35 |Display all floors
  1. There is 7 scales of Seismic Intensity in Japan.
Copy code
  1. Seismic intensity 7 in Japan is similiar to Seismic intensity 10~12
Copy code



Shindo 7 (Jap. scale) means open end and is not comparable to a fictitious mag. 10 to 12 which did never happen on earth in recorded history. An mag. 7,1 earthquake is as well a shindo 7 as a mag. 9,0 or 9,5 earthquake. This is the reason why in stronger earthquakes magnitudes are always published (usually starting form shindo 4,0 already).

Modern high rise buildings are generally constructed to withstand a mag. 8,0 quake - at the most - If such buildings withstand anything above it is more a matter of luck and not necessarily a matter of better construction. The 9,0 Giant East Japan quake had an impact of between 7,0 and 7,5 on nearby land (around Sendai) where almost no  building was destroyed in the quake but many in the tsunami.

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Post time 2011-3-16 10:50:38 |Display all floors
Originally posted by satsu_jin at 2011-3-16 10:46
  1. There is 7 scales of Seismic Intensity in Japan.
Copy code
  1. Seismic intensity 7 in Japan is similiar to Seismic intensity 10~12
Copy code

end and is not comparable to a fictitious mag. 10 to 12 which did never happen on earth in recorded history

I am sorry that it should be written as
Seismic intensity 7 in Japan is similiar to Seismic intensity 10~12 in China.

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Post time 2011-3-16 10:52:53 |Display all floors
Originally posted by satsu_jin at 2011-3-16 10:46
Modern high rise buildings are generally constructed to withstand a mag. 8,0 quake - at the most
.
Buildings are generally constructed to withstand the scale measured not by Magtitude but by Seismic intensity in both China and Japan.

e.g.  a magititude 8 earthquake may be described as Seismic intensity 5 in X city, Seismic intensity 4 in Y city, Seismic intensity 3 in Z city.

[ Last edited by 468259058 at 2011-3-16 06:10 PM ]

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Post time 2011-3-16 10:58:28 |Display all floors
Originally posted by 468259058 at 2011-3-16 11:50

I am sorry that it should be written as
Seismic intensity 7 in Japan is similiar to Seismic intensity 10~12 in China.



Do you know the seismic intensity (Chinese scale) of the Great Wenchuan quake which had mag. 8,0 on the Richter scale and shindo 7 on the Japan. scale?


This comparison would give you a rather accurate measurment.

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