PR分数决定着一个网页在搜索排名中的位置，分数越高，排名就越靠前。但近日，大量知名门户网站和博客网站的PR值从7骤降至5，引发了人们的不满。
10月29日消息，据国外媒体报道，谷歌PageRank(PR)值近日出现了大地震，很多网站的PR值从7骤降至5。
PR分数决定着一个网页在搜索排名中的位置，分数越高，排名就越靠前。但近日，大量知名门户网站和博客网站的PR值从7骤降至5，引发了人们的不满。
例如，福布斯(Forbes.com)、华盛顿邮报(WashintonPost.com)、SFGate.com、SunTimes.com和Engadget.com等网站均从PR7降至PR5。
对此，有业内人士认为，可能是因为谷歌调整了PageRank算法所致。但是，谷歌却给予了否认，称并未调整PageRank算法。
以下为受此次“ 地震”影响的部分网站名单：
知名博客网站：
Engadget (from 7 to 5)
AutoBlog (from 6 to 4)
Problogger (from 6 to 4)
Copyblogger (from 6 to 4)
Search Engine Journal (from 7 to 4)
Quick Online Tips (from 6 to 3)
Search Engine Roundtable (from 7 to 4)
Blog Herald (from 6 to 4)
Weblog Tools Collection (from 6 to 4)
JohnTP (from 6 to 4)
Coolest Gadgets (from 5 to 3)
CyberNet News (from 6 to 4)
John Chow(from 5 to 4)
门户网站：
Washington Post (from 7 to 5)
Washington Times (from 6 to 4)
Charlotte Observer (from 6 to 4)
Forbes.com (from 7 to 5)
SFGate.com (from 7 to 5)
Sun Times (from 7 to 5)
New Scientist (from 7 to 5)
Seattle Times (from 6 to 4)
