Urgent for articles, demanding that environmental protection be linked to earthquakes.

Because the earth is constantly moving and changing, it gradually accumulates huge energy, causing sudden rupture of rock strata or dislocation of original faults in some fragile areas of the crust. This is an earthquake.

Most earthquakes occur in the earth's crust.

Earthquakes are divided into tectonic earthquakes, volcanic earthquakes, subsidence earthquakes and induced earthquakes.

Tectonic earthquake means that under the action of tectonic movement, when the local stress reaches and exceeds the strength limit of rock stratum, the rock stratum will suddenly deform or even rupture, and the energy will be released at once, causing ground motion. This kind of earthquake is called tectonic earthquake, accounting for more than 90% of the total number of earthquakes.

Volcanic earthquake refers to an earthquake that occurs in the deep underground due to the fracture or collapse of the overlying strata due to the loss of a large amount of magma, the reduction of underground pressure or the lack of time to replenish magma. The number of such earthquakes is small, accounting for only about 7% of the total number of earthquakes.

Collapse earthquake is a local earthquake caused by underground cave or goaf collapse. Collapse earthquakes are all the results of gravity, with small scale and low frequency, accounting for only about 3% of the total number of earthquakes.

Artificial earthquakes and induced earthquakes are earthquakes caused by artificial blasting, mining, military construction and underground nuclear tests. Earthquakes caused by human production activities Some fault activities are called induced earthquakes, mainly including reservoir earthquakes, deep well pumping and water injection induced earthquakes, nuclear tests induced earthquakes, and mining activities and irrigation can also induce earthquakes. Since the storage of Xinfengjiang Reservoir in Guangdong Province in June 1959+00, 337 earthquakes have been recorded by the end of June 1987, among which an earthquake with magnitude of 6. 1 occurred in June/962, resulting in cracks 82 meters long in the concrete dam.

Sichuan earthquake details:

On May 2008 12 and 14: 28: 04.0, an earthquake of magnitude 7.6 occurred in Wenchuan County, Sichuan Province, with the epicenter at 3 1.0 degrees north latitude and 0/03.4 degrees east longitude. Around June 2 14: 35, there was an obvious earthquake in Beijing.

On May 12 15: 00, The Paper learned from the Seismological Bureau of Hunan Province that the Wenchuan earthquake in Sichuan had risen to 7.8.

Xinhua News: According to the National Seismological Network, on May 2, 2008 14: 28: 04.0, an earthquake of magnitude 7.6 occurred in Wenchuan County, Sichuan Province, with the epicenter at 3 1.0 degrees north latitude and 0/03.4 degrees east longitude. 15: 06, an earthquake occurred in Guichuan County, Sichuan Province, affecting Wuhan. 12 14:35 an earthquake of magnitude 3.9 occurred in Tongzhou district of Beijing (39.8 degrees north latitude,1/6.8 degrees east longitude).

Hunan Online May 12 News While Changsha citizens felt the earthquake, the QQ group where the reporter was located also had netizens from all over the country to reflect the earthquake.

The netizen in Nanchang said, "Just now there was an earthquake in Nanchang!" Subsequently, netizens in Kunming, Hohhot, Beijing, Lanzhou and other places all expressed a sense of shock.

According to the reporter's incomplete statistics at the first time, Hainan, Yunnan, Sichuan, Hunan, Chongqing, Jiangxi, Hubei, Beijing, Gansu, Shanxi and Inner Mongolia all felt earthquakes to varying degrees.

Nanhai Net reported in May 12. The reporter learned from the Forecast Center of Seismological Bureau of Hainan Province that this afternoon 14: 28, according to preliminary estimation, an earthquake of magnitude 7.6 occurred in Sichuan, and Hainan had obvious earthquake sensation.

Office workers in Pearl River Plaza and Golden Hotel along Binhai Avenue felt the obvious earthquake and have gone downstairs to evacuate. There are people on one side of the road. It is understood that employees of HNA Building have also been evacuated downstairs.

The reporter just learned from the Seismological Bureau of Inner Mongolia that the epicenter of the earthquake was in Wenchuan, Sichuan, and the earthquake in the central and western parts of Inner Mongolia was an earthquake, so there is no need to panic.

14: 32, the buildings near Xietaizi in High-tech Zone all experienced different degrees of vibration. The earthquake is obvious.

It is reported that at the same time, earthquakes can also be felt in Banan District, Nan 'an District, Northern New District, Yuzhong District, Hechuan District, Dazu, Wansheng and Jiangjin. Many citizens have called this website to break the news, which is shocking.

Hualong. Com reported on February 2nd 14: 45 that there was an obvious earthquake in Chongqing this afternoon 14: 32.

14: 32, the buildings near Xietaizi in High-tech Zone all experienced different degrees of vibration. The earthquake is obvious.

It is reported that at the same time, earthquakes can also be felt in Banan District, Nan 'an District, Northern New District, Yuzhong District, Hechuan District, Dazu, Wansheng and Jiangjin. Many citizens have called this website to break the news, which is shocking.

Today 14: 28: 04.0, an earthquake of magnitude 7.8 occurred in Wenchuan County, Sichuan Province. The epicenter was located at 3 1.0 degrees north latitude and 0/03.4 degrees east longitude. The earthquake in Shaanxi is obvious. Above, citizens who feel "shaken" are running in the street from a welfare zone in Anton, Xi.

Xinmin. Com exclusively reported that an earthquake of magnitude 7.6 occurred in Wenchuan, Sichuan on May 2 14: 28. According to Phoenix Satellite TV1May 2 15: 25, there were obvious earthquakes in Beijing, Shanghai, Taiwan Province, Bangkok and Hanoi.

Nearly ten thousand people died in Sichuan, and nearly seven thousand people were injured and hospitalized.

More than 7,000 people died in Beichuan County and 52 people died in Guangyuan.

Deyang 4 12 people died, Chengdu 323 people died and 1059 people were injured.

The death toll of Juyuan Town Middle School in Dujiangyan City has increased to more than 50, Ziyang died 10, and 86 people were injured.

Eight people died in Meishan City, more than 3,000 people were injured, and five people died in Zhongjiang County.

Five people died in Ganzi Prefecture, 59 people died in Aba Prefecture, 5 people were missing, 67 people were seriously injured and 680 people were injured.

Four people died in Neijiang and seven people died in Suining.

Twenty-seven people were killed and four people were missing in Maoxian county.

Fifty people died in Chongqing.

Five people died in Liangping Primary School, more than 20 people were buried, and more than 0 people were injured 100.

Gansu Gansu Shaanxi died 180 people.

More than 50 people died in Wudu District of Longnan City, 5 in Xihe County, 6 in Huixian County, Lixian County 1 person, Huachi County of Qingyang City 1 person, a school in Xifeng District 16, and Ningxian County 1 person.

0/0 people were injured in Daqin Township, Kongtong District, Pingliang City, and 3 people were injured in Wushan County, Tianshui City.

Two people died in Gannan prefecture

Death in Yunnan 1 person.

Zhaotong 1 person died and 9 people were injured.

85 people were killed and 3 13 people were injured in Shaanxi.

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