- 1 decade agoFavorite Answer
Hello, everyone, my willing want what to speak today is an earthquake, local earthquake occurrence, we will feel that the whole world is all fluttering, he will cause very big breakage, make a lot of person's dead and injureds, will also make a lot of people homeless, if we can in advance predict seismic occurrence, can make the injury declined lowest, so I want to share with everyone some predict a seismic method, although these method also can't the occurrence of the accurate estimate earthquake, and some earthquakes predictings probably basically can't take place, in advance of prevention work original should do like, just have Jing decision, really didn't take place on the whole, that can't lose, either much and greatly, if really took place, doesn't that can avoid a dead and injured?
Connect down me to start introducing some predict a seismic example and method:
1.The underground water level prognosticates:Before the earthquake take place, the fluctuation of rock stratum will squeeze groundwater, make the groundwater rising perhaps descended, so can observe by observing the fluctuation of underground water level.
2009-04-18 02:54:44 補充：
2.The well water contains amount of Dong:Of the variety Dong is a kind of radio air, the scientists think when the rock is subjected to strong pressure, the rock is internal to produce numerous small crack Xis and usually only use a microscope just in sight.
2009-04-18 02:55:12 補充：
the rock is internal to produce numerous small crack Xis and usually only use a microscope just in sight.
2009-04-18 02:55:45 補充：
After rock had crack Xi, the surface exposed to groundwater accumulates naturally will also increase,
2009-04-18 02:56:11 補充：
be groundwater to seep into crack Xi in, repair the crevice of full fission,
2009-04-18 02:56:38 補充：
can come in contact with more radio material, absorb more Dongs of quantity in the meantime.
2009-04-18 02:58:04 補充：
Until the earthquake takes place, the rock suddenly cracks and the content of Dong descends gradually again.
2009-04-18 02:58:22 補充：
Consequently, monitor well water to contain amount of Dong,
2009-04-18 02:58:34 補充：
can know the rock is subjected to power situation and predict earthquake thus
2009-04-18 02:59:05 補充：
3.Measure a ground of method(geodesic method):According to pass by many records,
2009-04-18 02:59:21 補充：
the earth crust will take place fluctuation, and sometimes take place before earthquake when the heavy earthquake take place,
2009-04-18 02:59:32 補充：
therefore measure the situation of the earth crust fluctuation and grind to judge the phenomenon of the earthquake early sign, can predict to will deny heavy earthquake occurrence.
2009-04-18 03:00:09 補充：
4."The pressure predicts":(Stress-forecasting, with show with traditional method mutually distinct), it made use of a kind of phenomenon that calls a secondary wave abruption(shear-wave splitting),
2009-04-18 03:00:33 補充：
namely the secondary wave splits into two parts while crossing a Yan layer, their parallelism vibration, and is mutually perpendicular with tiny view crack.These two parts cross a Yan layer by different speed, so arrive time of detector also different.
2009-04-18 03:00:44 補充：
Researcher said that the alignment of these tiny view cracks reflected the amount of pressure in the earth crust, the pressure was more big, the crack arranging is more many, two kinds of waves arrive time of detector to differ also more big.Source(s): 譯言堂, 譯言堂, 譯言堂, 譯言堂, 譯言堂, 譯言堂
- Secret LoveLv 71 decade ago
Everybody is good, what I must say today is the earthquake, when the earthquake occurs, we will think that the world will be swaying, he will create the very big destruction, will cause many person casualties, will also let many people be homeless, if we can 夠 predict earthquakes' occurrence, be possible to cause the injury beforehand to fall to lowly, therefore I must share some predict earthquakes' method with everybody, although these methods and will be unable the precise predict earthquakes' occurrence, moreover somewhat forecast the earthquake simply possibly will not occur, but beforehand prevention work should complete originally, only will be has the police to be determined that even if really has not occurred, that will not lose in a big way, but if the real occurrence, that has not been able to avoid the casualties? Then I start to introduce some predict earthquakes' example and the method: 1. subsoil water level observation: Before the earthquake occurs, because of the rock layer change, will extrude the ground water, will cause the underground water raising or the drop, therefore may observe because of the observation subsoil water level change. 2. the well water contains the radon quantity: The change radon is one kind of radioactive gas, the scientists thought that when the rock receives the formidable pressure, the rock interior produces the innumerable small crevasses, usually only then only then can see with the microscope. After the rock had the crevasse, the exposure will increase naturally also in the ground water surface area, in the local sewer permeating crevasse, will compensate the crevice which will split, may contact many radioactive substances, simultaneously will absorb a more abundant radon.
2009-04-11 19:14:36 補充：
Occurs until the earthquake, the rock cracks suddenly, the radon content gradually drops. Therefore, the monitor well water including the radon quantity, may know the rock stress situation, thus predict earthquakes. 3. measures the law (geodesic method):
2009-04-11 19:15:01 補充：
According to past many records, when the big earthquake occurs the earth's crust will have the change, but sometimes will occur before the earthquake, therefore the survey earth's crust change situation and will evaluate the earthquake omen phenomenon, may forecast that
2009-04-11 19:15:12 補充：
will have otherwise the big earthquake to occur. 4.”The pressure forecasts”: (stress-forecasting, shows with conventional routes difference), it has used one kind is called as the transversal wave to split (shear-wave splitting)
2009-04-11 19:15:33 補充：
the phenomenon, namely the transversal wave splits two parts in the traversing 巖 strata time, their parallel oscillation, and is vertical with the microscopic crack. These two parts by different speed traversing 巖 level,
2009-04-11 19:15:46 補充：
therefore arrives at the detection time to be also different. The researchers indicated that these microscopic crack's arrangement reflected in the earth's crust pressure quantity, the pressure has been bigger,
2009-04-11 19:15:52 補充：
the arrangement crack were more, two kind of waves arrived at the detection time difference to be also bigger.
2009-04-11 19:16:08 補充：