the difference between the arrival of the p-wave and s-wave
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the difference between the arrival of the p-wave and s-wave
lag time=(time it takes the s-wave to travel)-(time it takes the p-wave to travel)
20 km
4,000 kilometers
Inside lag is the time to implement (pass) a policy, while outside lag is the time it needs to take effect.
The impact of an event happening at a distance takes some time to reach the observer. This is the lag time and, as the distance increases, the lag time increases. The increase depends on the velocity of transmission of the information. For example, the lag time for a flash of lightning depends on the speed of light; the lag time for the clap of thunder depends on the speed of sound; the lag time for the person that the lightning bolt missed depends on how fast they can run to you.
no time lag.................
An event occuring at time t+k is said to lag behind event occurring at time t. Extent of lag is k.
The difference in arrival of P and S waves on a seismogram tells seismologists how far away the away the source of the quake is from the recording station. A little more detail! P-waves travel more quickly through the Earth than S-waves. As such the further away the seismometer is from an earthquake epicentre the greater the amount of distance the S-waves lag behind the P-waves. The same is true for lightning. The flash is visible light which is a form of electromagnetic wave and travels so quickly (approx. 300x106 m/s) that you see it (at what may as well be described as) instantly. However sound waves travel much more slowly (approx. 330 m/s in air), roughly a million times slower than light. As such there is a significant lag time between seeing the flash and hearing the resultant clap of thunder.
Time during which some action is awaitedSynonyms:delay; postponement; time lag; wait; holdmohamed ihab abdel hamid
an s-p interval is the time that it takes for the secondary waves of an earthquake after the primary waves hit.
The sp interval is the time between the p wave arrival and the s wave arrival