Fractures of the coronoid rarely occur in isolation. They usually occur in combination with a radial head fracture, a dislocation of the elbow, or both (terrible triad of the elbow).Large coronoid fractures often are associated with persistent elbow instability even after reduction of the dislocation.
Hydrothermal Vents. Measurement of tectonic plate movements. The amount of tectonic plate movement is measured using Global Positioning System (GPS) satellites and a network of GPS receivers. This technology allows scientists to measure plate movements as small as a few millimeters per year. click here to plot REAL-TIME data and visualize tectonic plate movement.
One seismograph is needed to measure vertical motion, and two to record horizontal motion. The two seismographs recording horizontal directions, record in 90-degree angles (Kauffman and Judson 182). Seismographs record in a zigzag trace that shoes the varying amplitude of ground oscillations beneath the instrument.