CHENGDU, May 10 -- Sichuan, a quake-prone province in southwest China, will provide its residents earthquake early warning services by the end of this year, according to the Sichuan Earthquake Administration.
The early warning services include alerting residents seconds before seismic waves arrive through multiple broadcasting systems, using the theory that radio waves travel faster than seismic waves.
Earthquake research has found that being aware of an earthquake three seconds beforehand can save 14 percent of casualties, 10 seconds can save 39 percent of casualties, and 20 seconds can save 63 percent of casualties.
The services will also offer residents brief information about the quake one to two minutes after a quake strikes, its magnitude two to five minutes later, and an assessment of the disaster within two hours.
China's capacity in earthquake monitoring and disaster relief has improved since 2008, when the Wenchuan Earthquake in Sichuan killed more than 69,000 people and left nearly 18,000 missing, said a report submitted to the country's top legislature last year.
A new generation of earthquake monitoring and warning systems have been installed along more than 20 high-speed railway lines spanning 6,642 km, said the report.
christmas day
JEFC Book 3 Unit 7 Lesson 26
初三英语被动语态
lesson34[上学期]
初三英语上学期9a Unit 1 grammar牛津英语
lesson27[上学期]
Lesson 26THE MAN WHO NEVER GAVE UP
初中英语时态
Lesson 45 感叹句
Composition 121
初三英语上学期chapter8牛津英语
A doctor for animals
The Passive Voice
初中英语的时态
SnowWhite白雪公主
LESSON42 THOMAS EDISON
East south west north
Lesson26[上学期]
book3 lesson42 The Great Green Wall
初三英语上学期9a Unit 1 maintask 牛津英语
A great inventor
七年级英语jUnit 12
lesson22[上学期]
lesson23[上学期]
lesson15[下学期]
初三英语复习2
lesson28[上学期]
lesson35[上学期]
初三英语上学期9A Unit 5牛津英语
被动语态复习
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |