they start at a earthquake.
No. S waves are really weak so it wouldn't last to that extent.
P-waves and S-waves. P waves are known as Primary waves as they have a high velocity and so are recorded at seismometer stations before Secondary or S-waves. P waves may also be known as pressure waves as they are in fact compression or longitudinal waves. S-waves may also be known as shear waves as they are transverse waves.
For P waves, the two descriptive words are Primary (or compressional) waves, while for S waves, the two words are Secondary (or shear) waves.
P waves arrive first and are faster than S waves, so measuring the time difference between their arrivals at different seismographs can help determine the distance to the earthquake epicenter. By using data from multiple seismographs, it is possible to triangulate the epicenter of the earthquake. The direction of the waves' arrival can also help determine the location of the earthquake along with other factors like amplitude and frequency.
Yes, a P-wave can travel through gas. P-waves are seismic waves that are the fastest and can travel through solids, liquids, and gases. They compress and expand the material they travel through, which allows them to propagate through gases as well.
P waves are primary waves that travel through solids, liquids, and gases, while S waves are secondary waves that only travel through solids. P waves are faster and can travel through the Earth's core, while S waves are slower and cannot pass through the core. Both types of waves are produced by earthquakes and can provide valuable information about the Earth's interior.