Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth 's subsurface from reflected seismic waves.arine survey acquisition is not just limited to seismic vessels; it is also possible to lay cables of geophones and hydrophones on the sea bed in a similar way to how cables are used in a land seismic survey, and use a separate source vessel.
Psoriasis typically starts or worsens because of a trigger that you may be able to identify and avoid. Factors that may trigger psoriasis include: 1  Infections, such as strep throat or skin infections. 2  Injury to the skin, such as a cut or scrape, bug bite, or a severe sunburn. 3  Stress. 4  Cold weather. 5  Smoking. 6  Heavy alcohol consumption.
1 The most common form, plaque psoriasis causes dry, raised, red skin lesions (plaques) covered with silvery scales. 2  The plaques itch or may be painful and can occur anywhere on your body, including your genitals and the soft tissue inside your mouth.3  You may have just a few plaques or many. 4  Nail psoriasis. The most common form, plaque psoriasis causes dry, raised, red skin lesions (plaques) covered with silvery scales. 2  The plaques itch or may be painful and can occur anywhere on your body, including your genitals and the soft tissue inside your mouth.