How to Read the Display. The seismograms displayed are from a few of the seismograph stations routinely recorded by the Northern California Seismograph Network. Each is a record of how the ground moved at a particular seismograph station in Northern California during a 24-hour period.he height of the recorded waves on the seismogram (wave amplitude) is a greatly magnified representation of the actual ground motion. A recording of an earthquake has recognizable characteristics.
View Full Profile. There are three main causes of retinal detachment, each with its own set of risk factors. The most common type is called a ârhegmatogenousâ detachment, and is caused by a tear or hole in the retina. The retina is the thin, light-sensitive tissue that lines the back inside wall of the eye.
Causes of Retinal Detachment. Retinal detachment is the result of vitreous liquid (the fluid inside the eye) leaking through a small hole or tear in the retina. When this occurs, the retina slowly peels away from the adjacent tissue, damaging the blood supply to the retina and preventing it from working properly.etinal detachment occurs when the retina separates from the tissue and blood vessels located in the back of the eye. Often brought on by a retinal tear, retinal detachment may lead to permanent vision loss or complete blindness if left untreated.