Frequently Asked Questions About Compression, Compression Stockings, and Armsleeves. We're always glad to any questions you may have. If you need a quick answer, please use our Live Chat service, available from 9:00 a.m. to 6:00 p.m. Monday to Friday by clicking the Chat Now button to the left.
Seismic waves are waves of energy that travel through the Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.
Surface waves are the slowest seismic waves and are the final waves to hit an area after an earthquake. First, P-waves move through compression through the deep layers of the Earth. P-waves are also carried by air and water, causing them to make a sound when they hit the Earth's surface. They result in minimal damage.