Scientists who study earthquakes are known as seismologists.
They will use seismometers to measure the frequency and amplitude of the seismic waves produced when an earthquake occurs.
They also measure the deformation of the earth's surface around fault zones. This measurement is often made using high precision GPS to measure relative positions of surface features around the fault zone. They may also use terrestrial laser scanning equipment which can measure changes in the ground shape (essentially recording deformation) or by using a special form of radar (synthetic aperture radar) and a technique called interferometry (the combined use is known as synthetic aperture radar interferometry or InSAR for short). This process essentially involves the use of a radar to create a series of very accurate relief maps of the ground surface over time and then to compare the maps to create a final plot showing the changes between them which is essentially a record of the land surface deformation.
They may also use strain gauges and tilt metres within boreholes to observe ground deformations as well as a technology known as time domain reflectometry which is an electrical technique used to locate damage and deformation in electrical cables and which in turn can be used to measure deformations.
Well a Richter's scale gives a brief measure and a seismograph gives a better detailed one.
My Answer is that scientists can not predict earthauakes to the exsact date
a seismograph
Measuring the temperature with adequate instruments.
show the pic of measuring balance of mass
The Richter Scale
This is known as a seismogram.
10 times
There are many instruments for measuring speed but I am not aware of any for measuring velocity.
Correctest
In general, we use measuring instruments, but the name depends on what you are measuring.
Nova Measuring Instruments was created in 1993.
well there are many instruments
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Measuring the temperature with adequate instruments.
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The symbol for Nova Measuring Instruments Ltd. in NASDAQ is: NVMI.
show the pic of measuring balance of mass
There are special angle-measuring instruments which you can use to measure the angle.
Magnitude