Earthquake Magnitude Scale

Sensitive seismographs can record earthquakes with magnitudes of negative value and have recorded magnitudes up to about 9 0.

Earthquake magnitude scale. Sunday s earthquake was the largest to hit north carolina since 1916 when a magnitude 5 5 quake was recorded according to the national weather service office in greenville. The first widely used method the richter scale was developed by charles f. Richter in 1934 it used a formula based on amplitude of the largest wave recorded on a specific type of seismometer and the distance between the earthquake and the seismometer.

There are a number of ways to measure the magnitude of an earthquake. Denoted explicitly with m w or mw and generally implied with use of a single m for magnitude is a measure of an earthquake s magnitude size or strength based on its seismic moment a measure of the work done by the earthquake it was defined in a 1979 paper by thomas c. This was later revised and renamed the local magnitude scale denoted as ml or m l.

Often felt but. Usually not felt but can be recorded by seismograph. Estimated number each year.

An earthquake with a magnitude of 4 4 on the richter scale struck near mizoram s champhai region on tuesday said the national centre for seismology ncs. An earthquake of 3 3 magnitude on the richter scale shook parts of bharuch town and nearby areas of gujarat with its epicentre in jhagadia taluka on m. On monday evening an earthquake of 3 3 magnitude on the richter scale rocked gujarat.

Because of various shortcomings of the m l scale most. The richter scale also called the richter magnitude scale or richter s magnitude scale is a measure of the strength of earthquakes developed by charles f. Champhai mizoram india july 28 ani.

The moment magnitude scale mms. Parts of bharuch town and nearby areas felt tremors of the earthquake with the epicentre in jhagadia taluka. The 1906 san francisco earthquake for example had a richter magnitude of 8 25.

Hanks and hiroo kanamori similar to the local magnitude scale m l defined by. Residents in bharuch town quickly rushed out of their houses and commercial establishments.