Our website supports browsing more than two years of outage data, organized by geography and time. The map is a google-maps-style world map, with circle on it at even intervals (every 0.5 to 2 degrees of latitude and longitude, depending on the zoom level). Circle sizes show how many /24 network blocks are out in that location, while circle colors show the percentage of outages, from blue (only a few percent) to red (approaching 100%).
We hope that this website makes our outage data more accessible to researchers and the public.
The research is funded by the Department of Homeland Security (DHS) Cyber Security Division (through the LACREND and Retro-Future Bridge and Outages projects) and Michael Keston, a real estate entrepreneur and philanthropist (through the Michael Keston Endowment). Michael Keston helped support this the initial version of this website, and DHS has supported our outage data collection and algorithm development.
The website was developed by Dominik Staros, ISI web developer and owner of Imagine Web Consulting, based on data collected by ISI researcher Yuri Pradkin. It builds on prior work by Pradkin, Heidemann and USC’s Lin Quan in ISI’s Analysis of Network Traffic Lab.
On August 25, 2017 Hurricane Harvey made landfall in south Texas, causing widespread property damage, displacing more than 30,000 people, and costing more than 45 lives (as of 2017-09-01).
We sympathize with those were hurt by this disaster, and hope for swift recovery for the region.
We recently examined the effects of Hurricane Harvey on the area using Trinocular, our internet outage detection system. Two key results:
We see that landfall was followed by widespread Internet outages in the Corpus Christi area, with 40% or more home networks dropping off the Internet.
We see that over the following days, network outages grew in the Houston area, with many networks dropping off the Internet. However, the fraction of networks lost in Houston was much smaller than in the Corpus Christi area.
The dataset including Hurricane Harvey will be internet_outage_adaptive_a29all-20170702 and will be released in October 2017. Until the full data is released, we have a preliminary dataset through August 2017 available on request.
The differences in the census are small, as one would hope, since it’s a global Internet. However, when we look at latency (the time it takes for an IP address to reply to our requests), Greece gives us a European view.
Compare the lower-left corner of the Internet, since that is European IPv4 address space:
In addition to big thanks to George Xylomenos and George Polyzos of AUEB (σας ευχαριστώ!) and AUEB for institutional funding for this work. We also thank Christos Papadopoulos (Colorado State) for helping with many details, and Colin Perkins (U. Glasgow) for discussions about potential European hosts.
Data from our Greece census is available to researchers at no cost on the same terms as our existing census data. See our datasets page for details. Greek data starts with it61 as of 2014-08-29.