.-""""""-.
          .'          '.
         /   O    O     \
        :                :
        |                |
        : ',          ,' :
         \  '-......-'  /
          '.          .'
            '-......-'
               ||||
            ___||||___
           |  SIGNAL  |
           |  ══════  |
           |  ▓▓▓▓▓▓  |
           |__________|
          /____________\
    ~·~·~·~·~·~·~·~·~·~·~·~

📡 The Signal

Deep space transmissions decoded and interpreted

Today's Signal Decode Signal Catalog Signal Origins SETI History About

📚 Signal Catalog

Notable transmissions from across the electromagnetic spectrum.
Each entry represents a mystery waiting to be understood.

The Wow! Signal (1977)

FREQUENCY: 1420.456 MHz
DURATION: 72 seconds
SOURCE: Sagittarius constellation
STATUS: NEVER REPEATED

Dr. Jerry Ehman circled the printout and wrote "Wow!" — the strongest candidate for an extraterrestrial radio signal ever detected. It matched all expected criteria for an ET signal and has never been satisfactorily explained.

LGM-1 / CP 1919 (1967)

FREQUENCY: 81.5 MHz
PERIOD: 1.337 seconds
SOURCE: Vulpecula constellation
STATUS: IDENTIFIED - First pulsar

Initially dubbed "LGM" (Little Green Men) by Jocelyn Bell Burnell who discovered the perfectly regular pulses. Later identified as the first known pulsar — a rotating neutron star — but for a few exciting weeks, it seemed alien.

Fast Radio Burst 121102

FREQUENCY: 1.4 GHz
DURATION: ~1 millisecond bursts
SOURCE: Dwarf galaxy, 3 billion light-years
STATUS: REPEATING - UNPRECEDENTED

The first known repeating fast radio burst. These millisecond blasts release as much energy as the sun does in 80 years. Their origin remains one of astronomy's great mysteries.

BLC1 (2020)

FREQUENCY: 982.002 MHz
DURATION: 30 hours observed
SOURCE: Proxima Centauri direction
STATUS: ANALYZED - Likely terrestrial

Breakthrough Listen Candidate 1 — a narrow-band signal appearing to come from our nearest stellar neighbor. Analysis suggests terrestrial interference, but the tantalizing possibility lingers.

SHGb02+14a (2003)

FREQUENCY: 1420 MHz (drifting)
DETECTIONS: 3 separate occasions
SOURCE: Between Pisces and Aries
STATUS: UNEXPLAINED

A SETI@home candidate that appeared three times at the hydrogen line frequency. Its drift rate suggests a planet rotating 40 times faster than Earth — or something else entirely.