Erta Ale is a remote and rarely visited volcano that is known currently to have an active lava lake in its summit crater. Erta Ale has undergone seven eruption events in the past 125 years.
Re: What are the differences between Signal ground, Chasis ground and Earth?? Signal Ground is a reference point from which that signal is measured, due to the inevitable voltage drops when current flows within a circuit, some 'ground' points will be slightly different to others. There may be several signal grounds in a circuit.
Its function is to keep your equipment as close as possible to ground potential and provide a safe path for ground-fault current to flow. Although it's rather simple component, an equipment-grounding conductor (EGC) serves a vital role in your overall electrical system. You use an equipment-grounding conductor (EGC) to ground the noncurrent-carrying metal parts of equipment.