rveciana - crisi-sismica-de-la-costa-de-vinaros

Crisi sísmica de la costa de Vinaròs

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Aquesta animació representa els sismes davant la costa de Vinaròs des de mitjans de setembre.

L’estrella indica la posició aproximada de la planta Castor, situada segons les diferents fonts a 22 quilòmetres de la costa davant de Vinaròs. Els números dins els cercles representen la magnitud del sisme en l’escala de Richter.

Les dades de les magnituds i epicentres estan tretes de la pàgina de l’Institut Geològic de Catalunya.

Entrada al blog per entendre la part tècnica.

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.stroke {
  fill: none;
  stroke: #000;
  stroke-width: .5;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/d3.geo.tile.v0.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>
/**
Based on Mike Bostock's http://bl.ocks.org/mbostock/4150951
*/
var width = 960,
    height = 500;

var projection = d3.geo.mercator()
    .center([0.5491, 40.4942])
    .scale(20000);

var path = d3.geo.path()
    .projection(projection);

var tile = d3.geo.tile()
    .scale(projection.scale() * 2 * Math.PI)
    .translate(projection([0, 0]))
    .zoomDelta((window.devicePixelRatio || 1) - .5);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

  var tiles = tile();

  var defs = svg.append("defs");

var magnitudeScale = d3.scale.linear().domain([2,5]).range([5,30]);
d3.json("data.json", function(error, locations) {

  svg.append("g")

    .selectAll("image")
      .data(tiles)
    .enter().append("image")
      .attr("xlink:href", function(d) {
        return "https://a.tiles.mapbox.com/v3/mapbox.world-bright/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; })
      .attr("width", Math.round(tiles.scale) + 1)
      .attr("height", Math.round(tiles.scale) + 1)
      .attr("x", function(d) { return Math.round((d[0] + tiles.translate[0]) * tiles.scale); })
      .attr("y", function(d) { return Math.round((d[1] + tiles.translate[1]) * tiles.scale); });

  svg.append("g")
      .append('path')
      .attr("d","m 0,0 -8.47858,-5.22254 -8.31623,5.47756 2.34696,-9.67752 -7.77927,-6.21653 9.92909,-0.75852 3.50829,-9.31953 3.78972,9.20873 9.94748,0.45679 -7.58687,6.44982 z")
      .attr("stroke","black")
      .attr("stroke-width",2)
      .style("fill", d3.rgb(90, 90, 90))
      .attr("transform", "translate("+projection([0.66879, 40.33503])[0]+","+projection([0.66879, 40.33503])[1]+")");

  var locationsG = svg.append("g");


  function addLocation(loc){
    locationsG.append('circle')
      .attr('class','location')
      .attr("r", 5)
      .attr("cx", projection([loc.lon, loc.lat])[0])
      .attr("cy", projection([loc.lon, loc.lat])[1])
      .style("fill", d3.rgb(255, 0, 0).darker(2))
      .style("opacity", 0.8)
      .transition()
      .duration(1000)
      .attr("r", magnitudeScale(loc.magnitude))
      .transition()
      .delay(2000)
      .duration(2000)
      .style("opacity",0.3);

    locationsG
      .append("text")
      .text(loc.magnitude)
      .attr("x", projection([loc.lon, loc.lat])[0] - 10)
      .attr("y", projection([loc.lon, loc.lat])[1] + 5)
      .attr("font-family", "sans-serif")
      .attr("font-size", "12px")
      .attr("fill", "black")
      .style("opacity",0)
      .transition()
      .duration(1000)
      .style("opacity",1)
      .transition()
      .delay(2000)
      .duration(2000)
      .style("opacity",0);
  }

  //addLocation({"lat": "40.43", "magnitude": "2.7", "lon": "0.7", "datetime": "2013-10-09T06:43:16"});

  var intDate = new Date("2013-09-10T00:00:00Z");
  var maxDate = new Date("2013-10-04T00:00:00Z");
  var usedLocations = new Array();

  var dateTitle = svg
    .append("text")
    .attr("id", "dataTitle")
    .text(intDate.toLocaleDateString())
    .attr("x", 70)
    .attr("y", 20)
    .attr("font-family", "sans-serif")
    .attr("font-size", "20px")
    .attr("fill", "black");

  var interval = setInterval(function() {

    dateTitle.text(intDate.toLocaleDateString());

    for (i = 0; i<locations.length; i++){
      var locationDate = new Date(locations[i].datetime);

      if (locationDate <= intDate && usedLocations.indexOf(locations[i].datetime) == -1){

        usedLocations.push(locations[i].datetime);
        addLocation(locations[i]);
      }

      if (intDate>maxDate){
        clearInterval(interval);
      }

    }

    intDate.setDate(intDate.getDate() + 1);
  }, 1000);

});

</script>