首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
How can the new technology predict the coming earthquake?
How can the new technology predict the coming earthquake?
admin
2012-06-26
28
问题
How can the new technology predict the coming earthquake?
Currently, the most modern systems for predicting earthquakes find them only a short time before the event. Like most strong earthquakes, the one that hit southwestern China in May was not identified early enough for people to flee the area. That earthquake killed sixty-nine thousand people.
But scientists who study earthquakes are reporting that new technology could measure very small changes below ground in the Earth’s surface. Their report was published in September in Nature magazine.
Fenglin Niu is an earthquake expert with Rice University in Houston, Texas. He and his team performed experiments along California’s San Andreas Fault, an area famous for its many earthquakes.
The team placed highly sensitive electrical devices about one kilometer below ground in two different places. The devices were able to measure even small changes in air pressure below ground. The scientists say such changes are caused when rocks push together, forcing air out of small cracks in the rock. When this happens, earthquake waves travel faster than usual through the rock.
The experiment was performed near Parkfield, California. Two earthquakes hit the area in late two thousand five. The first took place on December twenty- fifth. A smaller earthquake struck five days later.
The scientists noted changes below ground about ten hours before the first quake struck. That quake measured three in intensity. They then found similar changes taking place two hours before the other quake struck five days later.
The earthquake in China rated seven point nine in intensity. If additional tests confirm the changes are linked to earthquakes, the scientists believe their equipment could be used for early warning systems. A system that provides a signal ten hours before a major earthquake could help move people from the area and save lives.
The scientists now hope they can find earthquakes with even greater intensity by placing their equipment deeper in the ground.
选项
A、It can find small changes below ground before the earthquake.
B、The devices are placed much deeper below ground.
C、The new electrical devices are highly sensitive.
D、It can help find the earthquake-prone are
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/FqTO777K
0
研究生英语学位课统考(GET)
相关试题推荐
Ateachercannotgive______attentiontoeachpupilifhisclassislarge.
MyfatherwasbominGermanyandstillspeaksEnglishwithaGerman______.
Theseplasticflowerslookso______thatmanypeoplethinktheyarereal.
She______herselfbitterlyforherbehaviorthatevening.(2004年上海理工大学考博试题)
Theschoolshootingtriggeredabarrageoftransparentlyirrelevantproposedsolutions,tossedoutwithoutregardtotheirrelev
Howmuchpaindoanimalsfeel?Thisisaquestionwhichhascausedendlesscontroversy.Opponentsofbiggameshooting,forexam
Inscience,atheoryisareasonableexplanationofobservedeventsthatarerelated.Atheoryofteninvolvesanimaginarymodel
Fastfood,amainstayofAmericaneatingfordecades,mayhavereachedaplateauintheUnitedStatesasthematuringbaby-boom
Agreatdealofattentionisbeingpaidtodaytotheso-calleddigitaldivide—thedivisionoftheworldintotheinfo(informatio
OurculturehascausedmostAmericanstoassumenotonlythatourlanguageisuniversalbutthatthegesturesweuseareunderst
随机试题
WhileIwaswaitingtoenterauniversity,Isawinanewspaperateacherjob【C1】______ataschoolabouttenmilesfromwhereI
牙周病的医源性因素,除外
任何单位,必须经公安交通管理部门和()的批准,才能按规定占用和挖掘城市道路。
企业货物入境报检时应填写( ),并提供外贸合同、发票、提运单、装箱单等有关单证。
被称为“海上名山,寰中绝胜”的名山是()。
一位教师走进教室时,刚刚推开虚掩着的教室门,忽然一把扫帚掉了下来,不偏不倚,正好打在教师的讲义夹上,课堂上一片哗然,这分明是学生搞的恶作剧。下列处理方式,最恰当的一项是()。
()是研究从众现象的经典心理学实验。
没有法定依据或者不遵守法定程序的,行政处罚()。
在考生文件夹下有一个数据库文件“samp2.accdb”,其中存在已经设计好的3个关联表对象“tStud”、“tCourse”和“tScore”及一个临时表对象“tTmp”。请按以下要求完成设计。(1)创建一个查询,查找并显示照片信息为空的男同学的“学号
Ironically,theintellectualtoolscurrentlybeingusedbythepoliticalrighttosuchharmfuleffectoriginatedontheacademic
最新回复
(
0
)