Jul 11, 2014. 1  Summertime is wedding time, so to commemorate the season, Spotify looked at thousands of wedding-themed playlists to determine the 10 most popular first dance songs. So, not a totally scientific round-up, but the results do seem to be pretty accurate based on our own not-so-scientific assessments.
Surface waves (e.g. Rayleigh waves, Love waves) that produce vertical motion of the ground surface produce the most damage during an earthquake.
(Also man-made due to nuclear explosions) 2. Tectonic Earthquakes. Most earthquakes occur at plate margins due to. tension, compression or shearing forces. Rocks at plate margins are in constant motion. and are being pushed, pulled, bent, twisted and. folded. Inevitably at some point they must break or. crack to produce FAULTS!!