Web Statistics for www.iris.edu for 2009

updated: 2009.12.31

AWStats Glossary contains information about unique visitors, number of visits, pages, hits, etc.

Top pages viewed:

• Seismic Monitor
• IRIS Home page
• IRIS Programs
• QUACK
• WILBER II
• BUD tools
• Special Earthquake Events
• IRIS Data
• SAC Software
• Earthquakes

Daily Web Visits to the IRIS website in 2009. The sharp peaks correspond to major earthquakes. Web traffic naturally increases during the working week and dips during the weekend resulting in an weekly hump pattern. The dip in March 2009 was due to a power outage at the DMC.

In April 2009, the M6.3 earthquake in Central Italy caused a spike in daily web traffic. At the end of September 2009, there was a M8.0 quake in the Samoa Islands plus a M7.6 quake in Sumatra. The M7.6 quake in Vanuatu resulted in a peak in web visits on Oct 7, 2009.

Unique Visitors to the IRIS website from 2003 to 2009. The peaks correspond to major earthquakes. The large peak in December 2004 followed the Sumatra earthquake and tsunami. The increase in visitors during May 2006 was due to an earthquake in Java. The peak in September 2007 followed the M8.4 earthquake in Sumatra. The spike in May 2008 followed the M7.9 Sichuan China earthquake.

On 6 April 2009, the M6.3 earthquake in Central Italy caused a steep increase in web traffic and record number of software downloads at the DMC.

M8.0 Samoa Islands and M7.6 Sumatra quakes caused a spike in web visits at the end of September, 2009.

A unique visitor is a statistic describing a unit of traffic to a Web site, counting each visitor only once in the time frame of the report (Wikipedia).