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
56
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 help reduce the power of major earthquakes.
B、It can provide a signal a few days before a major earthquake.
C、It can provide a signal up to ten hours before a major earthquake.
D、It can tell people where the earthquake center is.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/LqTO777K
0
研究生英语学位课统考(GET)
相关试题推荐
Oncethe______contradictionisgrasped,allproblemswillbereadilysolved.(2003年上海交通大学考博试题)
Asubstancesuchassandmaybeeitherfineor______.
ThedistancebetweentheEarthandtheSunmaybesaidtobe______.(2003年南开大学考博试题)
Anystudentwho______hishomeworkisunlikelytopasshisexamination.
Despiteallthehealed______theyhad,theyremainedthebestoffriendsthroughouttheirlives.
Therewas______rainandsnowlastwinter.Sowehaveagoodharvestthissummer.
Watchababybetweensixandninemonthsold,andyouwillobservethebasicideaofgeometrybeinglearned.Oncethebabyhasm
Themajorityofsuccessfulseniormanagersdonotcloselyfollowtheclassicalrationalmodeloffirstclarifyinggoals,assessi
Inasocietywhereallaspectsofourlivesaredictatedbyscientificadvancesintechnology,scienceistheessenceofourexi
Moviesareoftenheldupaseithertheparagonsorpariahsofoursocietyatlarge;toweringachievementsontheonehandanden
随机试题
国家赔偿以支付赔偿金为主,以退还财产和恢复原状为辅,但这三种方式不可以单独适用。()
Thehighestanxietymomentintheholidayseasonmustbethemomentjustbeforeyourlovedonesunwraptheirgifts.Theribbonc
我很快意识到手机就像香烟一样,很难戒掉。
活动范围大,稳定性差,容易脱位的关节是
2012年12月,某公司对县税务局确定的企业所得税的应纳税所得额、应纳税额及在12月30日前缴清税款的要求极为不满,决定撤离该县,且不缴纳税款。县税务局得知后,责令该公司在12月15日前纳税。当该公司有转移生产设备的明显迹象时,县税务局责成其提供纳税担保。
风险评估是项目风险管理的________。
公安专业工作的危险性体现在()。
以下说法哪一个是正确的?
Onenteringanothercountry,atouristwillhaveto______theCustoms.
Ourerawitnessesmanycaseswhereourownlibertycontradictswithothers’.Hereisanexampletoshowthisdelicateissue.A
最新回复
(
0
)