HCHTech
Well-Known Member
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- Location
- Pittsburgh, PA - USA
We are a victim of today's widespread Verizon outage - all phones have been down since about 9am this morning for us. We have some Comcast lines we use for backup, so we're not dead in the water, but it has been an.....interesting day.
Verizon did make a twitter post about 11:30am, but no updates at all since then - I'm sure you are shocked at that revelation.
This got me thinking about sites like downdetector.com. Here is their current graph for Verizon:

Here's what Downdetector's own site says about the reporting:
So the graph shows number of reports of outages greater than the baseline average number of outages for any given time of day. For example the peak of this outage was around 11:30 today, and the alt-text tells you that the baseline (i.e. "normal") number of reports of Verizon outages at 11:30am is 76. Today's graph shows the total of 104,440 reports in excess of the baseline. If you follow the graph forwards to 4:00 pm, the baseline number is 86, and the total reported outages at 4:00pm are 47,067 more than the baseline.
I guess what struck me was this language from their help pages:
In other words, there is no tracking at all (because how could there be) of when service comes back to the folks that report an outage. So the downward slope of the graph doesn't mean or even imply that service is being restored. It just means that over time, fewer NEW people are reporting an outage. Their graph is only updated every 15 minutes, so on its face, it doesn't provide any information about the true extent of an outage or it's resolution. It's only measuring new complaints.
If you add up all of the data points on their graph, you can get the total number of people that reported an outage, but that's it. No measure of any mitigation at all. And because to total number of possible reports is not provided (or known, I expect), you can't know anything like "40% of their customers are without service".
No question here at all, but just an observation that these graphs are a lot less useful than they appear....plus, I've seen the downdetector graph in at least 3 news stories today about the outage.
Verizon did make a twitter post about 11:30am, but no updates at all since then - I'm sure you are shocked at that revelation.
This got me thinking about sites like downdetector.com. Here is their current graph for Verizon:

Here's what Downdetector's own site says about the reporting:
A small number of users reporting a problem does not constitute a large-scale incident. To make sure that incidents are correctly represented, Downdetector calculates a baseline volume of typical problem reports for each service monitored, based on the average number of reports for that given time of day, measured over the previous year. Downdetector only reports an incident when the number of problem reports is significantly higher than the baseline.
So the graph shows number of reports of outages greater than the baseline average number of outages for any given time of day. For example the peak of this outage was around 11:30 today, and the alt-text tells you that the baseline (i.e. "normal") number of reports of Verizon outages at 11:30am is 76. Today's graph shows the total of 104,440 reports in excess of the baseline. If you follow the graph forwards to 4:00 pm, the baseline number is 86, and the total reported outages at 4:00pm are 47,067 more than the baseline.
I guess what struck me was this language from their help pages:
Downdetector only accepts the first report for a specific company from a single user. Subsequent information about the issue is collected, but is not counted as a new problem report.
In other words, there is no tracking at all (because how could there be) of when service comes back to the folks that report an outage. So the downward slope of the graph doesn't mean or even imply that service is being restored. It just means that over time, fewer NEW people are reporting an outage. Their graph is only updated every 15 minutes, so on its face, it doesn't provide any information about the true extent of an outage or it's resolution. It's only measuring new complaints.
If you add up all of the data points on their graph, you can get the total number of people that reported an outage, but that's it. No measure of any mitigation at all. And because to total number of possible reports is not provided (or known, I expect), you can't know anything like "40% of their customers are without service".
No question here at all, but just an observation that these graphs are a lot less useful than they appear....plus, I've seen the downdetector graph in at least 3 news stories today about the outage.