Powerful Magnitude 6.7 Gulf of California earthquake – P- and S-Wave seismograms

Though we included a live seismogram in one of our supporting articles, as the time passes the waves from the Gulf of California earthquake will disappear.
To avoid total erasing of this event, please find below the static seismogram from this M 6.7 earthquake.

Clicking on the image will lead you to the seismicnet website where seismograph builders are publishing their seismograms and their questions and answers.

An earthquake has always a P- and and S-wave, P being the first noticed, mostly seconds before the main tremor.

To understand P- and S-waves better, here is the wikipedia describing information (clicking on the link will give even more specialist details) :

P-waves are type of elastic wave, also called seismic waves, that can travel through gases (as sound waves), solids and liquids, including the Earth. P-waves are produced by earthquakes and recorded by seismometers. The name P-wave stands either for primary wave, as it has the highest velocity and is therefore the first to be recorded.

The S-wave, secondary wave or shear wave is one of the two main types of elastic body waves, so named because they move through the body of an object, unlike surface waves.
The S-wave move as a shear or transverse wave, so motion is perpendicular to the direction of wave propagation: S-waves, like waves in a rope, as opposed to waves moving through a slinky, the P-wave. The wave moves through elastic media, and the main restoring force comes from shear effects.

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