C# - Print Custom List In JavaScript?

I have a custom list earthquakes which contains a list of earthquakes. How do I parse this in JavaScript in order to add it to innerHtml and display on the screen. The problem is that I cannot get this to display on the screen in a div. When it parses I get no result because my javascript is wrong and if I try just printing the result i get [Object object]

So the flow goes input from textbox -> web service -> list to javascript

earthquakes class:

public class earthquakes
{
public string eqid { get; set; }
public double magnitude { get; set; }
public double lng { get; set; }
public string source { get; set; }
public DateTime date { get; set; }
public int depth { get; set; }
public double lat { get; set; }
}
dataEarthquakes class
public class dataPostalCodes
{
public List<postalCodes> postalCodes { get; set; }
}

WebService:

public static dataEarthQuakes getEarthquakes(dataPostalCodes postalCodes)
{
double lat = postalCodes.postalCodes[0].lat;
double lng = postalCodes.postalCodes[0].lng;
Uri address = new Uri(String.Format(FindEarthquakes, lat, 0, lng, 0));
WebClient client = new WebClient();
string jsonResponse = string.Empty;
jsonResponse = client.DownloadString(address.AbsoluteUri);
var results = JsonConvert.DeserializeObject<dataEarthQuakes>(jsonResponse);
return results;
}

Javascript:

function OnLookupComplete(e) {
var result = e;
var weatherData = new Sys.StringBuilder();
var line;
for (var property in result.dataPostalCodes) {
line = String.format("<b>{0}:</b> {1}<br/>",
property, result.dataPostalCodes[property]);
weatherData.append(line);
}
$get('divResult').innerHTML = weatherData.toString();
}

Json string:

{"earthquakes":[{"eqid":"2010utc5","magnitude":7.7,"lng":97.1315,"src":"us","datetime":"2010-04-06 20:15:02","depth":31,"lat":2.3602}, {"eqid":"2009kdb2","magnitude":7.6,"lng":92.9226,"src":"us","datetime":"2009-08-10 17:55:39","depth":33.1,"lat":14.0129},{"eqid":"2010zbca","magnitude":7.6,"lng":123.533,"src":"us","datetime":"2010-07-23 20:51:11","depth":576.3,"lat":6.4939},{"eqid":"2010xkbv","magnitude":7.5,"lng":91.9379,"src":"us","datetime":"2010-06-12 17:26:50","depth":35,"lat":7.7477},{"eqid":"c0000rxc","magnitude":7.4,"lng":143.7392,"src":"us","datetime":"2010-12-21 16:19:41","depth":14.9,"lat":26.8656},{"eqid":"2010zbcd","magnitude":7.4,"lng":123.2677,"src":"us","datetime":"2010-07-23 21:15:08","depth":616.7,"lat":6.7489},{"eqid":"2010wbaq","magnitude":7.4,"lng":96.0805,"src":"us","datetime":"2010-05-09 03:59:44","depth":61.4,"lat":3.7284},{"eqid":"2007hvbq","magnitude":7.4,"lng":142.6846,"src":"us","datetime":"2007-09-28 11:38:58","depth":261.3,"lat":21.98},{"eqid":"2010zbbz","magnitude":7.3,"lng":123.4788,"src":"us","datetime":"2010-07-23 20:08:11","depth":604.5,"lat":6.7079},{"eqid":"2007xvam","magnitude":7.3,"lng":126.292,"src":"us","datetime":"2007-01-21 10:27:42","depth":10,"lat":1.2071}]}