A logarithmic scale recording the severity of earthquakes Because the scale is logarithmic, a 4 2 quake is ten times stronger than a 4 1 quake
A logarithmic scale for expressing the magnitude of an earthquake in terms of the energy dissipated in it A modified version of this scale is commonly used
A logarithmic scale that provides a scientific, quantitative measure of the magnitude of an earthquake
the system invented by Dr Charles F Richter to measure the strength of earthquakes
A logarithmic scale that measures the amount of energy released during an earthquake on the basis of the amplitude of the highest peak recorded on a seismogram Each unit increase in the Richter scale represents a 10-fold increase in the amplitude recorded on the seismogram and a 30-fold increase in energy released by the earthquake Theoretically the Richter scale has no upper limit, but the yield point of the Earth's rocks imposes an effective limit between 9 0 and 9 5
Logarithmic scale for measuring earthquake magnitude A magnitude 7 0 earthquake generates 10 times larger amplitude waves than those of a magnitude 6 0, and releases 32 times more energy
Earthquakes are measured and reported in the Richter Scale It is a logarithmic scale which means that a Richter 3 is 10 times greater than a Richter 2, and a Richter 4 is 100 times as great as a Richter 2 Richter 3 can cause slight damage in the local area, Richter 4 causes moderate damage, Richter 5 considerable damage, and Richter 6 severe damage Richter 7 causes widespread heavy damage and is called a Major Earthquake; an 8 on the Richter scale is a Great Earthquake capable of tremendous damage In recent years the Richter scale has been replaced with a more precise scale known as the moment-magnitude (M) scale which measures total energy released by an earthquake The 1906 San Francisco earthquake is 7 7, the 1989 Loma Prieta earthquake is 7 0, and the 1994 Northridge earthquake is 6 7 by the M scale The 1995 Kobe, Japan earthquake was 6 8 on the Richter scale and 6 9 on the M scale
A scale of earthquake intensity graded from 1 (very weak) to 12 (total destruction)
a logarithmic scale of 1 to 10 used to express the energy released by an earthquake
Introduced in 1935 by Charles F Richter, the Richter scale is a numerical scale for quantifying earthquake magnitude -- typically it refers to local magnitude, but for larger quakes, it often refers to surface-wave magnitude (Currently, large quakes are generally assigned a moment magnitude, which is scaled to be similar, but is based on seismic moment, and a better measure of the energy of an earthquake ) Since the Richter scale is logarithmic, very small earthquakes (microearthquakes) can have a negative magnitudes While the scale has no theoretical upper limit, the practical upper limit, given the strength of materials in the crust, is just below 9 for local or surface-wave magnitudes (and just below 10 for moment magnitudes)
A scale for measuring the magnitude of an earthquake devised by the American seismologist Charles Richter It is based on the amplitude of the seismic wave recorded by seismographs
The system used to measure the strength of an earthquake Developed by Charles Richter in 1935 as a means of categorizing local earthquakes It is a collection of mathematical formulas; it is not a physical device
Devised by C F Richter in 1935, an index of the seismic energy released by an earthquake (as contrasted to intensity that describes its effects at a particular place) expressed in terms of the motion that would be measured by a specific type of seismograph located 100 km from the epicentre of an earthquake