Instantiate - Getting specific data from another script

For my final in class I am being asked to visualize data. I've taken earthquake data from an Excel file an converted it to a TXT. In that data set there are multiple columns including Latitude and Longitude.

I am trying to call those specific variables from that data and to create a sphere for each piece. In other words, for every line of data a sphere is going to be created with that specific latitude and longitude. But right now I'm getting an error that reads:

NullReferenceException: Object reference not set to an instance of an object LevelScript.Start () (at Assets/Classes/LevelScript.cs:24)

Here is the data so it matches:

using UnityEngine; using System.Collections; using System.Collections.Generic; using System.IO;

public class LevelScript : MonoBehaviour {

 public TextAsset earthquakeDataFile;
 
 EarthquakeStruct[] earthquakeStructs; // penguins
 
 // Use this for initialization
 void Start () 
 {
     earthquakeStructs = ParseEarthquakeFile();
     for (int i = 0; i < 1; i++)
     {
         // instantiate that sphere 
         GameObject sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
         sphere.AddComponent<EarthquakeStruct>();
         sphere.transform.position = new Vector3(0, 0, 0);
             
         // set the variables in that sphere to the same as the ones in our struct
         float tempLat = earthquakeStructs[i].GetLatitude();
         float tempLong = earthquakeStructs[i].GetLongitude();
         **sphere.GetComponent<EarthquakeStruct>().SetLatitude(tempLat);
         sphere.GetComponent<EarthquakeStruct>().SetLongitude(tempLong);**

         
         // call function to move gameobject to latitude / longitude location
         sphere.GetComponent<EarthquakeStruct>().MoveToLocation();
     }    
 }
 
 // Update is called once per frame
 void Update () 
 {
 
 }
 
 private EarthquakeStruct[] ParseEarthquakeFile()
 {
     EarthquakeStruct[] temp = new EarthquakeStruct[0];    // make empty array
     
     //read text file
     string earthquakeFile;
     
     earthquakeFile = earthquakeDataFile.text; // entire file
             
     if (earthquakeFile != null)
     {
         string[] lines = earthquakeFile.Split('#'); //each line
                 
         // initialize array
         temp = new EarthquakeStruct[lines.Length]; // set length of struct array
         
         for (int i = 1; i < lines.Length; i++)
         {
             string[] columns = lines[i].Split(','); // each column
             
             // convert into float
             float latitude = 0;
             float longitude = 0;
             
             if (columns.Length > 15) // has reasonable number of columns for our data set
             {
                 if (columns[1] != null) // isn't a null variable
                 {
                     if (columns[1].Length > 0) // not empty
                     {
                         latitude = float.Parse(columns[1]); // parse data into float
                     }
                 }
                 if (columns[2] != null)
                 {
                     if (columns[2].Length > 0)
                     {
                         longitude = float.Parse(columns[2]);
                     }
                 }
             }
             
             temp[i] = new EarthquakeStruct(latitude, longitude); // set struct info
         }                
     }
     return temp;
 }
 

}