<h2>Answer : Seismic Waves.</h2><h2 /><h3>Explanation : </h3><h3>Vibrations that move through the ground carrying the energy released during an earthquake are called seismic waves.</h3>
Seismic waves are waves of energy which usually travels through the Earth's layers, and as a result release the energy during earthquakes, volcanic eruptions, magma movement, large landslides or large man-made explosions. It is mainly measured through a special instrument called as seismometer and the graph obtained is called as seismograph.
Potassium-39<span> - It has </span>19 protons<span> and atomic mass is </span><span>39
</span>Calcium has <span>20 protons
fluorine has </span><span>9 protons
Aluminum has </span><span>13 protons</span>