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.
There are three main types of faults - transform, convergent, and divergent - classified by which way the plates are moving. Image by Jose F. Vigil, USGS via Wikimedia Commons, Creative Commons License. The 2004 tsunami in Indonesia, and the devastating 2011 tsunami in Japan, were both caused by convergent fault earthquakes. Two plates collided, one slid underneath the other, and a ton of friction built up between the two plates.