5.12汶川地震(英文版)

5.12 Wenchuan earthquake

Seismic parameters

Time:

at 14:28 on May 12, 2008 04.0 seconds

Latitude: 31.0 ° N

Longitude: 103.4 ° E

Depth: 33 km

Richter:

Richter 8.0

The greatest intensity: 11 degrees

Epicenter: Yingxiuwan town of Wenchuan County, Sichuan

Dujiangyan city, Dayi County, northwest 48 km (346 °) northwest of

Chengdu 75 km (302 °)

Causes

CAS

researcher

at

the

Institute

of

Geology

and

Geophysics,

the

Qinghai-Tibet

Plateau

Research

Wang

Wenchuan

27

pairs

more

familiar

with regional geological structure, in early May has been Wenchuan

area. He

analyzed that

Wenchuan earthquake

occurred in

the southeast

edge of the Qinghai-Tibet Plateau, western Sichuan Longmenshan the

center,

located

in

Wenchuan

-

Timor-mao

on

the

fault

Ocean

plate

northward

movement,

squeezing

the

Eurasian

plate,

causing

uplift

of the Qinghai-Tibet Plateau. At the same time in the uplift of the

plateau,

also

eastward

movement,

squeezing

the

Sichuan

Basin.

Sichuan

Basin

is

a

relatively

stable

block.

Although

the

main

looks

Longmenshan

tectonic activity is not strong, but the stress may be stored in the

process

of

accumulation

to

a

certain

extent,

the

crust

will

break

down,

so the earthquake. The U.S.

Geological Survey also

released

the news

that

the earthquake's epicenter and

focal

mechanisms and

Longmenshan

fault

or

a related movement

of tectonic

fault

in

line,

the

earthquake

is

a

thrust

to

the

northeast

of

the

campaign

results.

From

the

mainland

scale,

Central

Asia

and

East

Asia, the

seismic

activity is due

to

the

Indian

Ocean

plate

collision

of

the

Eurasian

Plate.

Southern

California

Earthquake Research Center, Professor Li Yonggang told Xinhua,

Longmenshan fault zone is earthquake-prone region of active faults,

from the Qinghai-Tibet Plateau deep eastward flow of material

disruption

to

the

Sichuan

Basin,

the

upward

movement,

which

both

border

For the fault plane. If the fault movement a few centimeters a year,

once

every 50 to 70 meters, the

accumulation

of

stress

and energy

can

be

generated

from

a

magnitude

7

earthquake

above.

As

the

source

shallow,

and

focal

mechanism

for

the

eastward thrust

of

the

campaign, coupled

with soft soil earthquake zone, seismic waves will spread eastward

very long, making far to Shanghai and Beijing and other cities have

generally felt.