The diagrams show what happens when P waves and S waves pass through the Earth. S waves do not pass through the Earth's core S waves cannot pass through the liquid outer core, but P waves can.

The Alaska Earthquake Center reported a magnitude 3 earthquake about 3:20 p.m. Monday about two miles south of Haines.

The core itself consists of a solid inner core and a liquid outer core. There are three types of seismic waves – P waves, S waves and surface waves. P waves are longitudinal waves, and their ...

A new study shows that SCD is linked to prolonged P-wave duration, even in individuals with no coincident cardiovascular conditions or atrial fibrillation. Share on Facebook. Opens in a new tab or ...

There are two different rates that can be determined on an ECG. The atrial rate is indicated by the frequency of the P waves. The ventricular rate is indicated by the frequency of the QRS complexes.

Because the atrial rate is so fast, and the action potentials produced are of such low amplitude, P waves will not be seen on the ECG in patients with atrial fibrillation. At times, the P wave ...