The image above represents bourger anomaly.

To compute for bourger anomaly, three essential parameters are needed and these parameters are **Free Air Correction (g _{F}), **

**Bouguer Correction (δg**and

_{B})**Terrain Correction (δg**

_{T}).The formula for calculating bourger anomaly:

g_{B} = g_{F} – δg_{B} + δg_{T}

Where:

g_{B} = Bouguer Anomaly

g_{F} = Free Air Correction

δg_{B} = Bouguer Correction

δg_{T} = 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;

g_{F} = Free Air Correction = 14

δg_{B} = Bouguer Correction = 18

δg_{T} = Terrain Correction = 20

g_{B} = g_{F} – δg_{B} + δg_{T}

g_{B} = 14 – 18 + 20

g_{B} = 14 – 38

g_{B} = -24

Therefore, the **bourger anomaly **is **-24 mGal.**

**Calculating the Terrian Correction when the Bourger Anomaly, the Free Air Correction and the Bourger Correction is Given.**

δg_{T} = g_{B} – g_{F} + δg_{B}

Where;

δg_{T} = Terrain Correction

g_{B} = Bouguer Anomaly

g_{F} = Free Air Correction

δg_{B} = 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.

This implies that;

g_{B} = Bouguer Anomaly = 48

g_{F} = Free Air Correction = 22

δg_{B} = Bouguer Correction = 14

δg_{T} = g_{B} – g_{F} + δg_{B}

δg_{T} = 48 – 22 + 14

δg_{T} = 26 + 14

δg_{T} = 40

Therefore, the **terrian correction **is **40.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the bourger anomaly.

To get the answer and workings of the bourger anomaly using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **for** NGN 2,000 **per** annum** to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

**Android (Paid)** – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

**Android (Free)** – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

**Apple (Paid)** – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Geology**** **under **Add-on****.**

Now, Click on **Gravity **under **Geology**

Now, Click on **Bourger Anomaly **under **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 (g _{F}), **

**Bouguer Correction (δg**and

_{B})**Terrain Correction (δg**

_{T}).Now, enter the values appropriately and accordingly for the parameters as required by the **Free Air Correction (g _{F}) **is

**14,**

**Bouguer Correction (δg**is

_{B})**18**and

**Terrain Correction (δg**is

_{T})**20**.

Finally, Click on Calculate

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