can earthquakes be detected before it hits?

Question

This is for my project.

Thanks

Answer 1

Earthquakes can only be forecast in general terms. We know where they are likely to occur, and we can determine how often they occur on average, but there are no recognizable precursors that can reliably give warning that a quake will strike a specific place at a specific time.



Once an earthquake begins, however, some warnings can be issued. The fault rupture progresses (and the surface shock waves travel) at roughly 2 miles/3km per second, so a warning can give people at some distance from the epicenter anywhere from a few seconds to as much as a minute to prepare and take cover.



Like nearly all earthquakes, the Alaska quake was a complete surprise, except that it occurred in an area where large quakes always occur every few centuries.

Answer 2

Scientifically, yes



Earthquakes can be scientifically predicted by observing tiny cracks in rocks and how they widen when the rock is under stress. Other changes are also observable when a rock starts to compress, including changes in electrical resistance and the speed at which sound waves propagate through the rock. The swelling of cracks in a rock before it breaks is called dilantancy. It begins when the force on the rock is about half the force required for it to break.



The 1964 Anchorage, Alaska, earthquake and the resulting tsunami struck without warning on Good Friday, March 27.

Answer 3

There are several methods adopted by various person in the prediction work. But I am the person working in the field of early warning systems. I have designed more than 10 instruments connected with earthquakes.My method and instrument helped to issue Tsunami warning 2 hours before Tsunami struck our coast. Read those unproved prediction methods.

Methods for prediction of earthquakes & Tsunami

Even though it is difficult to predict, the following methods may help.

.

1. Seismic gape: - The earthquake at a particular place may occur for every fixed gape of time. By knowing the past records of the quakes affected at that place may help to decide when the earthquake is next due.

2. Planet position.: - When the stress is accumulated at the tectonic plate boundary and the same time if the position of more than 2 planets comes in a straight line this may help to accelerate the earthquakes. There fore the full moon days and new moon days are more vulnerable days for earthquakes. Some time this method fails why? Think of a sick patient. New moon and full moon days are dangerous for only sick patents. These days will not affect the healthy people. The same way if there is no accumulated stress at the tectonic plate boundaries no need to worry about the planet positions.

3. Sun rays falling method: - If you observe the position of the sun rays falling on our wall at a particular time on all days it should form an angular infinity symbol. If there is any deviation in its path it means that there is some difference in height of the earth. That means some strain noticed at that place. Somebody claims that they can predict the place of epicenter by observing this. The laser beam measuring method of earth height from satellite also will help.

4. MDCB:- Chinese scientist claims that they can predict up to 60 % accuracy by sensing electro magnetic rays.

5. Cloud forming: - Few hours to a few days before the occurrence of earthquakes a cloud reader claims that he has noticed a peculiar mosaic type of formation .We may also notice some lightening in the sky.

6. By sound :- A professor from Ajmeer University claims that he was able to hear a low frequency noise under 125 meter depth in a bore well. The same thing was reported by one Mr. Nair that he heard some roaring noise under the earth one week before the occurrence of earthquake in Gujarat.

7. By frequency of waves :- Mr Richter Allen of Berkley University claims that he can decide the magnitude of earthquake just 4 seconds after observing the frequency of the primary wave. Present method needs the full seismographic picture to find the real magnitude that too from as many places as possible to have fairly accurate results. His claim has got some truth because when there is a slip of bigger tectonic plate the frequency of quake will be less. If a small tectonic plate slips the frequency of the waves will be more.

8. There are several changes in nature and in the behaviors of animals and birds can be observed before an earthquake and Tsunami. The water level in well may change. Stay away from beaches if you sense earthquake waves. The Tsunami may attack long after the shaking is stopped. I wrote several articles on these subjects.

Have one simple earthquake alarm installed in your house.













.

Answer 4

Actually, earthquakes can only be detected WHEN they occur. There are certain places where earthquakes are prone to strike, such as fault lines, and plate boundaries.



They cannot be predicted.

Answer 5

no... they can guess but cant know

Answer 6

i dont think it was...but i'm not sure