It will almost certainly take several tens of thousands of years, if the growth rate for L'ihi is comparable to that of other Hawaiian volcanoes (about 0.1 foot per year averaged over geologic time).
A: The Richter scale is used to quantitatively measure the magnitude of an earthquake. This tool was devised by the seismologist Charles F. Richter in 1935. Full Answer >
What the moment magnitude measures. The moment magnitude includes the area of the fault's rupture and slippage along the fault. It also includes the size of the seismic waves recorded by seismographs on seismograms. Formerly the United States Geological Survey used the Richter Scale when describing an earthquake's magnitude. Use for great earthquakes.