Difference between magnitude and intensity | Munich Re Touch Natural Hazards
Often, several slightly different magnitudes are reported for an earthquake. This happens because the relation between the seismic measurements and the. Earthquake: Get the latest news and update on earthquake, also learn how intensity of an earthquake is measured. An earthquake is measured. An earthquake is measured by its Magnitude and Intensity. The Magnitude indicates the amount of energy released at the source (or epicentre).
How are earthquakes recorded?Magnitude and intensity I
How are earthquakes measured? How is the magnitude of an earthquake determined? Earthquakes are recorded by a seismographic network.
What is the difference between Magnitude and Intensity?
Each seismic station in the network measures the movement of the ground at the site. The slip of one block of rock over another in an earthquake releases energy that makes the ground vibrate. That vibration pushes the adjoining piece of ground and causes it to vibrate, and thus the energy Moment magnitude, Richter scale - what are the different magnitude scales, and why are there so many?
Earthquake size, as measured by the Richter Scale is a well known, but not well understood, concept. The idea of a logarithmic earthquake magnitude scale was first developed by Charles Richter in the 's for measuring the size of earthquakes occurring in southern California using relatively high-frequency data from nearby seismograph stations How do you determine the magnitude for an earthquake that occurred prior to the creation of the magnitude scale?
Earthquake: Relation between magnitude and intensity decoded | Skymet Weather Services
For earthquakes that occurred between about when modern seismographs came into use and when Charles Richter developed the magnitude scale, people went back to the old records and compared the seismograms from those days with similar records for later earthquakes. For calculating intensity, the responses of people in surrounding areas, worsened condition of structures and changes in natural surroundings are noted.
Areas near to the epicenter severely feel the shaking intensity and thus are affected critically as compared to those staying farther away.
The scale for noting the magnitude, does not takes into account the type of wave, but simply records the largest seismic wave. Richter scale is a logarithmic scale, with 10 as base. Thus, the magnitude of 5 is ten times more severe than a magnitude of 4. The calculation results of this scale are precise and the smallest earthquakes with negative magnitude values can also be recoded.
Earthquake: Relation between magnitude and intensity decoded
Intensity Measurement Scale Mercalli scale as invented in the year by Giuseppe Mercalli is a method to measure intensity of the earthquake. The intensity scale is not considered a purely scientific scale as it is dependent upon observations and responses of the people staying in vicinity.
For instance, an old structure might sustain severe damage as compared with a new one, thus confusing upon the results of intensity measurements. Mercalli intensity of an earthquake of magnitude 1.