Hingoli Earthquake Today: 4.5 Magnitude Tremor Shakes Maharashtra

An earthquake measuring 4.5 on the Richter Scale struck Hingoli, Maharashtra, at 07:14 IST today, as reported by the National Center for Seismology (NCS). The tremors, felt at around 7:14 a.m., originated at a depth of 10 kilometres.

The NCS confirmed the specifics of the event in a post on X, formerly Twitter, "EQ of M: 4.5, On 10/07/2024 07:14:53 IST, Lat: 19.43 N, Long: 77.32 E, Depth: 10 Km, Location: Hingoli, Maharashtra."

Understanding Earthquake Magnitude

Earthquake magnitude is typically measured by the amplitude of seismic waves recorded on seismometers. These measurements account for the distance between the earthquake's epicentre and the recording instrument.

The Richter Scale

The Richter scale, developed in 1935 by American seismologists Charles F. Richter and Beno Gutenberg, quantifies an earthquake's magnitude by the logarithm of the amplitude of the largest seismic wave recorded by a seismograph. Initially designed to measure moderate-sized earthquakes (magnitude three to seven), it allows for comparison between different earthquakes.

The Moment Magnitude Scale

For larger earthquakes, the moment magnitude scale (MW) is preferred. This scale, based on the total moment release of the earthquake (a product of the fault's displacement and the force required for that movement), is more accurate for measuring significant seismic events globally. The moment magnitude scale aligns closely with the Richter scale for small to large earthquakes but is unique in accurately measuring events of magnitude 8 and above.

Logarithmic Nature Of Magnitude Scales

Magnitude scales are logarithmic (base 10), meaning each whole number increase corresponds to a tenfold increase in recorded ground motion and about 32 times more energy release. For instance, a magnitude five earthquake causes ten times more shaking and releases 32 times more energy than a magnitude four earthquake. This scaling also allows for describing extremely small earthquakes, even in negative magnitudes, and has no upper limit.

The largest recorded earthquake, at magnitude 9.5, occurred along Chile's subduction zone in 1960. Although larger earthquakes might be possible, they are rare. Here's an overview of earthquake magnitudes, their typical effects, and the estimated frequency of their occurrence each year:

Earthquakes can be classified by their magnitudes, which describe the size and impact of the seismic event. Magnitudes less than 2.0 are classified as microearthquakes. These are incredibly common, with over a million occurring each year, though they are usually unfelt by people.

Earthquakes with magnitudes between 2.0 and 2.9 are considered minor and also occur very frequently, with more than a million instances annually. Slightly larger, earthquakes measuring between 3.0 and 3.9 on the scale are still categorized as minor but are less common, occurring over 100,000 times per year.

When magnitudes reach the range of 4.0 to 4.9, the earthquakes are described as light. These events occur more than 10,000 times each year and are often felt but rarely cause significant damage.

Moderate earthquakes have magnitudes between 5.0 and 5.9. These occur over 1,000 times annually and can cause considerable damage in populated areas.

Strong earthquakes, with magnitudes ranging from 6.0 to 6.9, happen more than 100 times a year. These events can cause serious damage over large areas, especially if they strike near cities.

Major earthquakes, which have magnitudes between 7.0 and 7.9, occur 10 to 20 times annually. These powerful earthquakes can cause widespread devastation.

Great earthquakes, with magnitudes between 8.0 and 8.9, are rare, with only one or two occurring each year. These are capable of causing tremendous destruction and loss of life over very large regions.

Finally, earthquakes with magnitudes of 9.0 and above are exceedingly rare, occurring approximately once every 20 years. These rare earthquakes are among the most catastrophic natural events possible, capable of causing profound and widespread damage.