P wave

These are usually bigger than the P waves, and have higher frequency.

They move a little more slowly than P waves, and can only pass through solids.

The P waves are also weaker, and often unnoticed by people.

P waves: Depends on the site of the ectopic focus.

"P waves are faster and would arrive here first?"

The P wave velocity in the north is 7% slower than that in the south.

The P wave is a record of the electrical activity through the upper heart chambers (atria).

"All in all, what would you estimate as the average velocity of a P wave leaving your explosion site and coming straight here?"

Upon reaching the outer core the wave reflects as a P wave.

A P wave with increased amplitude can indicate hypokalemia.

However, if there is atrial fibrillation, there wouldn't be a P wave present.

P waves: Upright, consistent, and normal in morphology and duration.

The pause ends with a P wave, instead of a junctional escape beat the way a sinus arrest would.

Unlike P waves, S waves don't move straight through the Earth.

A Q wave is any downward deflection after the P wave.

This has been further elucidated by the absence of P waves in any surface leads despite effective high right atrial pacing.

Because P waves are the fastest seismic waves, they will usually be the first ones that the seismograph records.

Absence of the P wave may indicate:

The P wave is the first wave that is bigger than the other waves (the microseisms).

You mentioned P waves.

The focal mechanism can be derived from observing the pattern of "first motions", that is, whether the first arriving P waves break up or down.

During atrial ectopic activity where the P wave is normally rounded can be inverted or peaked.

The Secondary waves moved slower than the P waves and whipped through the rock, shaking the ground sideways.

Different kinds of tremors, P waves, S waves.

If the atrial rhythm is not regular, there could be alternative explanations as to why certain P waves do not conduct to the ventricles.