Este es el código:
<?php
$earthquake= simplexml_load_file('http://earthquake.usgs.gov/earthquakes/catalogs/eqs7day-M5.xml');
$titledoc = $earthquake->channel->title;
$descriptiondoc = $earthquake->channel->description;
$linkdoc = $earthquake->channel->link;
$title1 = $earthquake->channel->item[0]->title;
$description1 = $earthquake->channel->item[0]->description;
$link1 = $earthquake->channel->item[0]->link;
$title2 = $earthquake->channel->item[1]->title;
$description2 = $earthquake->channel->item[1]->description;
$link2 = $earthquake->channel->item[1]->link;
$title3 = $earthquake->channel->item[2]->title;
$description3 = $earthquake->channel->item[2]->description;
$link3 = $earthquake->channel->item[2]->link;
$title4 = $earthquake->channel->item[3]->title;
$description4 = $earthquake->channel->item[3]->description;
$link4 = $earthquake->channel->item[3]->link;
$title5 = $earthquake->channel->item[4]->title;
$description5 = $earthquake->channel->item[4]->description;
$link5 = $earthquake->channel->item[4]->link;
$title6 = $earthquake->channel->item[5]->title;
$description6 = $earthquake->channel->item[5]->description;
$link6 = $earthquake->channel->item[5]->link;
$title7 = $earthquake->channel->item[6]->title;
$description7 = $earthquake->channel->item[6]->description;
$link7 = $earthquake->channel->item[6]->link;
$title8 = $earthquake->channel->item[7]->title;
$description8 = $earthquake->channel->item[7]->description;
$link8 = $earthquake->channel->item[7]->link;
$title9 = $earthquake->channel->item[8]->title;
$description9 = $earthquake->channel->item[8]->description;
$link9 = $earthquake->channel->item[8]->link;
$title10 = $earthquake->channel->item[9]->title;
$description10 = $earthquake->channel->item[9]->description;
$link10 = $earthquake->channel->item[9]->link;
$title11 = $earthquake->channel->item[10]->title;
$description11 = $earthquake->channel->item[10]->description;
$link11 = $earthquake->channel->item[10]->link;
echo $titledoc;
echo '<br>'.$descriptiondoc;
echo '<br>'.'<a href='.$linkdoc.'>Ir a página web</a>';
echo '<br>';
echo '<br>'.$title1;
echo '<br>'.$description1;
echo '<br>'.'<a href='.$link1.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title2;
echo '<br>'.$description2;
echo '<br>'.'<a href='.$link2.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title3;
echo '<br>'.$description3;
echo '<br>'.'<a href='.$link3.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title4;
echo '<br>'.$description4;
echo '<br>'.'<a href='.$link4.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title5;
echo '<br>'.$description5;
echo '<br>'.'<a href='.$link5.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title6;
echo '<br>'.$description6;
echo '<br>'.'<a href='.$link6.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title7;
echo '<br>'.$description7;
echo '<br>'.'<a href='.$link7.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title8;
echo '<br>'.$description8;
echo '<br>'.'<a href='.$link8.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title9;
echo '<br>'.$description9;
echo '<br>'.'<a href='.$link9.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title10;
echo '<br>'.$description10;
echo '<br>'.'<a href='.$link10.'>Ver Reporte</a>';
echo '<br>';
echo '<br>'.$title11;
echo '<br>'.$description11;
echo '<br>'.'<a href='.$link11.'>Ver Reporte</a>';
echo '<br>';
?>