EAMs

"Emergency Action Messages" are normal coded communications sent by the United States military, over the high-frequency Global Communications System (HFGCS.) These are air-to-air and and air-to-ground, between military installations and/or resources (aircraft, etc.) EAMs are a regular part of daily military communications, and a few different types exist. Most are low-priority. The UTwente WebSDR is just one of hundreds of online software-defined radios able to pick up EAMs.


👉 Many shortwave radio newbies assume that EAM activity means something dramatic is happening or that war is near. Please don't buy into the fearmongering. There is no direct correlation between increased EAMs and military drama- and when things get serious, the military switches to different communication methods we can't hear, anyway.

In recent years, online forums/discussion boards/social media became breeding grounds for rumors on this topic. We see it often: someone posts bogus info about EAMs, insisting "something is happening!" And they'll include a link to the U of Twente WebSDR. So hundreds of people with FOMO flood the site to try and listen, overwhelming the system. (Unfortunately, many new folks also forget their manners, flood the chatbox, or troll- forcing the admin to shut it off.) Happens every time. 😕

If you have no interest in shortwave as a hobby and just want to hear EAMs, go to http://sdr.hu/map and select one of the hundreds of WebSDRs shown- tune in to 8992.00 or 11175.00 USB frequencies.

If you're going to use the UTwente WebSDR and chatbox, please be a good guest. 😊 Keep the conversation polite and shortwave-related. The majority of the "regulars" pay little attention to EAMs, but we see a lot of the same questions asked repeatedly. (Hence why this site was made.) We enjoy helping people learn about shortwave, but ask that folks do a little EAM self-education first. Start here: