network outages in Louisiana with Hurricane Ida

We’ve been watching the situation in Louisiana develop with Hurricane Ida with our Trinocular Internet outage detection system.

Internet outages in Louisiana at 8:30pm Sunday evening August 29, corresponding to Hurricane Ida’s landfall.

Data as of 2021-08-30t01:30Z, which is 8:30pm Sunday night August 29 in New Orleans, shows about half of the networks in the New Orleans area being unreachable (mostly IPv4 home networks). Following shortly after landfall, these outages correspond with news reports about widespread power loss. Current data is appearing on our Internet outage map.

We wish the residents of Louisiana the best and hope for a rapid recovery.


new talk “Observing the Global IPv4 Internet: What IP Addresses Show” as an SKC Science and Technology Webinar

John Heidemann gave the talk “Observing the Global IPv4 Internet: What IP Addresses Show” at the SKC Science and Technology Webinar, hosted by Deepankar Medhi (U. Missouri-Kansas City and NSF) on June 18, 2021.  A video of the talk is on YouTube at Slides are available at

From the abstract:Covid and non-Covid network changes in India; part of a talk about measuring the IPv4 Internet.

Since 2014 the ANT lab at USC has been observing the visible IPv4 Internet (currently 5 million networks measured every 11 minutes) to detect network outages. This talk explores how we use this large-scale, active measurement to estimate Internet reliability and understand the effects of real-world events such as hurricanes. We have recently developed new algorithms to identify Covid-19-related Work-from-Home and other Internet shutdowns in this data. Our Internet outage work is joint work of John Heidemann, Lin Quan, Yuri Pradkin, Guillermo Baltra, Xiao Song, and Asma Enayet with contributions from Ryan Bogutz, Dominik Staros, Abdulla Alwabel, and Aqib Nisar.

This project is joint work of a number of people listed in the abstract above, and is supported by NSF 2028279 (MINCEQ) and CNS-2007106 (EIEIO). All data from this paper is available at no cost to researchers.