# How to Calculate and Solve for Bouguer Anomaly | Gravity

The image above represents bourger anomaly. To calculate bourger anomaly, three essential parameters are needed and these parameters are Free Air Correction (gF), Bouguer Correction (Î´gB) and Terrain Correction (Î´gT).

### The formula for calculating bourger anomaly:

gBÂ = gFÂ – Î´gBÂ + Î´gT

Where:

gBÂ = Bouguer Anomaly
gFÂ = Free Air Correction
Î´gBÂ = Bouguer Correction
And, Î´gTÂ = Terrain Correction

Let’s solve an example;
Find the bourger anomaly when the free air correction is 14, the bourger anomaly is 18 and the terrian correction is 20.

This implies that;

gF = Free Air Correction = 14
Î´gB = Bouguer Correction = 18
And, Î´gT = Terrain Correction = 20

gBÂ = gFÂ – Î´gBÂ + Î´gT
That is, gB = 14 – 18 + 20
gB = 14 – 38
gBÂ = -24

Therefore, theÂ bourger anomalyÂ isÂ -24 mGal.

### Calculating the Terrian Correction when the Bourger Anomaly, the Free Air Correction and the Bourger Correction are Given

Î´gTÂ = gB – gF + Î´gB

Where;

Î´gTÂ = Terrain Correction
gBÂ = Bouguer Anomaly
gFÂ = Free Air Correction
Î´gB = Bouguer Correction

Let’s solve an example;
Find the terrian correction when the bourger anomaly is 48, the free air correction is 22 and the bourger correction is 14.

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This implies that;

gB = Bouguer Anomaly = 48
gF = Free Air Correction = 22
Î´gB = Bouguer Correction = 14

That is, Î´gTÂ = gB – gF + Î´gB
Î´gT = 48 – 22 + 14
That is, Î´gT = 26 + 14
Î´gT = 40

Therefore, theÂ terrian correctionÂ isÂ 40.

### How to Calculate Bouguer Anomaly | Gravity in Nickzom Calculator

Nickzom Calculator â€“Â The Calculator Encyclopedia is capable of calculating the bourger anomaly.

To get the answer and workings of the bourger anomaly using the Nickzom Calculator â€“ The Calculator Encyclopedia.Â First, you need to obtain the app.

You can get this app via any of these means:

To get access to theÂ professionalÂ version via web, you need toÂ registerÂ andÂ subscribeÂ forÂ NGN 2,000Â perÂ annumÂ to have utter access to all functionalities.
You can also try theÂ demoÂ version viaÂ https://www.nickzom.org/calculator

Apple (Paid)Â â€“Â https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to theÂ Calculator Map,Â then click onÂ GeologyÂ underÂ Add-on.

Now, Click onÂ GravityÂ under Geology

Now, Click on Bourger Anomaly underÂ Gravity

The screenshot below displays the page or activity to enter your values, to get the answer for the bourger anomaly according to the respective parameters which are the Free Air Correction (gF), Bouguer Correction (Î´gB) and Terrain Correction (Î´gT).

Now, enter the values appropriately and accordingly for the parameters as required by the Free Air Correction (gF) is 14, Bouguer Correction (Î´gB) is 18 and Terrain Correction (Î´gT) is 20.

Finally, Click on Calculate

As you can see from the screenshot above,Â Nickzom Calculatorâ€“ The Calculator Encyclopedia solves for the bourger anomaly and presents the formula, workings and steps too.