The most dense layer of the atmosphere is the troposphere is the most dense layer because it is at the bottom of the atmosphere. The troposphere is where all our weather happe â¦ ns. It also has the highest air pressure. But more specifically, the earths atmosphere is most dense at the surface.
Earthquakes on faults like these may cause tsunamis in the Puget Sound region. 'Deep' faults Deep faults can occur where two tectonic plates collide and one of the plates is forced beneath the other.
Fault line: The Alaskan rim, where two of Earth's tectonic plates scrape against each other, could cause devastating tsunamis across the globe. The Semidi Islands lie close to the faultline, and an earthquake could send a tsunami towards Hawaii and California. According to Discovery.com, scientists are now investigating the underwater fault-line in the hope of estimating the likelihood of danger to the U.S. and to the Hawaiian islands.