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)

TAG: 网站 门户