OK Earthquakes X

Same chart as before. Only using hexbins.

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

text {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

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

</style>
<body id="width">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script src="/mbostock/4248145/example/d3.hexbin.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    windowWidth = document.getElementById("width").offsetWidth
    width = windowWidth - margin.left - margin.right,
    height = windowWidth - margin.top - margin.bottom;

var randomX = d3.random.normal(width / 2, 160),
    randomY = d3.random.normal(height / 2, 160),
    points = d3.range(2000).map(function() { return [randomX(), randomY()]; });

var color = d3.scale.linear()
    .domain([0, 20])
    .range(["white", "steelblue"])
    .interpolate(d3.interpolateLab);

var hexbin = d3.hexbin()
    .size([width, height])
    .radius(windowWidth/85);

var x = d3.time.scale()
    .domain([new Date(2001, 01, 01), new Date()])
    .range([0, width]);

var y = d3.scale.linear()
    .domain([1, 6])
    .range([height, 0]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom")
    .tickSize(6, -height);

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickSize(6, -width);

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var re = new RegExp('Oklahoma');

svg.append("clipPath")
    .attr("id", "clip")
  .append("rect")
    .attr("class", "mesh")
    .attr("width", width)
    .attr("height", height);

svg.append("g")
  .attr("class", "y axis")
  .call(yAxis)
  .append("text")
  .attr("transform", "rotate(-90)")
  .attr("y", 6)
  .attr("x", -10)
  .attr("dy", ".71em")
  .style("text-anchor", "end")
  .text("Magnitude");

svg.append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis)
  .append("text")
  .attr("y", -15)
  .attr("x", width - 10)
  .attr("dy", ".71em")
  .style("text-anchor", "end")
  .text("Date of Quake");

svg.append("g")
  .attr("class", "title")
  .attr("transform", "translate("+ height/2 +", 30)")
  .append("text")
  .style("text-anchor", "middle")
  .style("font-size", "22px")
  .text("Oklahoma Earthquakes");

d3.csv('https://earthquake.usgs.gov/fdsnws/event/1/query?format=csv&minmagnitude=1.0&minlongitude=-103&maxlongitude=-94&maxlatitude=37&minlatitude=33&starttime=2001-01-01', type, ready);

function type(d) {

d.place = d.place;
  d.mag = +d.mag;
  d.time = new Date(d.time);
  d.point = [x(d.time), y(d.mag)];
  return d;

}

function ready(error, quakes) {

if (error) {
    return console.warn(error);
  }

quakes = quakes.filter( function(d){ return re.test(d.place); });
  quakes = quakes.map( function(d) { return d.point; });

svg.append("g")
      .attr("clip-path", "url(#clip)")
    .selectAll(".hexagon")
      .data(hexbin(quakes))
    .enter().append("path")
      .attr("class", "hexagon")
      .attr("d", hexbin.hexagon())
      .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
      .style("fill", function(d) { return color(d.length); })
      .append("title")
      .text(function(d) {
        if (d.length == 1) {
          return "1 quake in bin";
        } else {
          return d.length + " quakes in bin";
        }
      });

}

</script>

Updated missing url http://bl.ocks.org/mbostock/raw/4248145/d3.hexbin.min.js to /mbostock/4248145/example/d3.hexbin.min.js

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js

https://bl.ocks.org/mbostock/raw/4248145/d3.hexbin.min.js