# How do you find the amplitude of an earthquake?

## How do you find the amplitude of an earthquake?

The amplitude is the height (on paper) of the strongest wave. On this seismogram, the amplitude is 23 millimeters. Find 23 millimeters on the right side of the chart and mark that point. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude.

How do you find amplitude and frequency?

Determine the frequency and the amplitude. Answer: The amplitude is 50 and ω = 5000. So the frequency is f = 1/T = ω / 2 π = 795.77 Hz….

Centimeters per period / div. cm
Frequency f = 1/T Hz

### What is the formula for amplitude of a wave?

The amplitude is the distance between the centerline and the peak or trough. x = A sin (ωt + ϕ) or x = A cos (ωt + ϕ) is the formula.

What is the earthquake frequency?

Frequency of earthquake is defined as how often a given earthquake with certain magnitude occurs. On average, earthquakes with a magnitude of 2 and smaller, which are called small earthquakes, happen several hundred times a day worldwide.

#### How is earthquake intensity calculated?

The Richter scale defines the magnitude of an earthquake to be R=log(IcIn) where Ic is the intensity of the earthquake and In is the intensity of a standard earthquake. Therefore, you can write the difference of two magnitudes as R2−R1=log(I2I1).

Is amplitude and frequency same?

Amplitude—distance between the resting position and the maximum displacement of the wave. Frequency—number of waves passing by a specific point per second. Period—time it takes for one wave cycle to complete.

## How do you calculate the frequency of a wave?

Frequency of a wave is given by the equations:

1. f=1T. where: f is the frequency of the wave in hertz. T is the period of the wave in seconds.
2. f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters.
3. f=cλ

What is the relation between magnitude and frequency of an earthquake?

The earthquake phenomena with respect to magnitude, time and space possesses power-law relation. The Gutenber-Richter (1944) frequency- magnitude relation, b-value, is a power law relation involving magnitude.

### How do you calculate the local magnitude of an earthquake?

Richter (1935) defined the local magnitude MLof an earthquake observed at a station to be ML= log A – log Ao ( ∆) (1) where A is the maximum amplitude in millimetres recorded on the Wood- Anderson seismographfor an earthquake at epicentral distance of ∆ km, and Ao (∆ ) is the maximum amplitude at ∆ km for a standard earthquake.

What is the difference between amplitude and energy of an earthquake?

The amplitude (“size”) differences are big enough, but the energy (“strength”) differences are huge. POWER LAW RELEATIONS IN EARTHQUAKE PHENOMENA The earthquake phenomena with respect to magnitude, time and space possesses power-law relation.

#### What is the magnitude of a 9 7 earthquake on the scale?

The magnitude scale is logarithmic, so (10**9.7) / (10**6.8) = 10** (9.7-6.8) = 10**2.9 = 794.328 The magnitude scale is really comparing amplitudes of waves on a seismogram, not the energy of the earthquakes. So, a magnitude 9.7 is 794

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