The Signal

A Science Fiction Short Story: In a universe filled with mysteries, the discovery of an extraterrestrial signal could change everything.

Chapter 1: The Question

Ray Faser leaned back in his chair, fingers steepled, staring at the projection of Earth’s nuclear test history—a timeline of detonations stretching from 1945 to 1996. The data pulsed like a slow, irregular heartbeat.

Two thousand nuclear blasts. Each one had sent an electromagnetic scream (EMP) into the void.

On the other side of the screen, Dr. Elias Varen, a senior astrophysicist with the SETI Institute, adjusted his glasses.
“You’re suggesting we’ve already announced ourselves.”

Ray consulted a printout and smirked.

A thermonuclear bomb blast in 1961 emitted 10 billion times more radio waves than the Arecibo message. Click to view the calculations (PDF).

“I’m saying we lit a bonfire in the ‘Dark Forest‘. And now we’re whispering ‘Hello?’ like we’re afraid of being rude.”

Varen exhaled. “The difference is intent. A nuclear EMP is noise. A structured message is a handshake.”

Ray leaned forward. “You think an advanced civilization hears a thousand atomic explosions and thinks, ‘Hmm, must be background radiation’? They’ll know what it is. And they’ll know it’s dangerous.”

Chapter 2: The UAP Variable

The Pentagon’s recent disclosures hung between them like an unspoken specter. Unidentified Anomalous Phenomena—craft defying known physics, lingering in Earth’s skies for decades.

Ray tapped the table. “If they’re already here, silence isn’t caution. It’s stupidity. We should be sending ‘We come in peace’ in every frequency we’ve got.”

Varen’s jaw tightened. “Or we’re confirming we’re a threat. Nuclear weapons, uncontrolled emissions—what if they’re waiting to see if we grow up?”

“Or waiting to see if we shoot first,” Ray countered. “The Dark Forest isn’t just a theory. It’s a mirror. We’re the ones who nuked ourselves two thousand times. We’re the predators.”

Chapter 3: The Silence Gambit

A new voice cut in—Dr. Elena Papadakis, a xenopsychologist. “Assume they have detected us. Silence could be read as hostility. A predator hiding.”

Varen shook his head. “Or prudence.”

Ray laughed bitterly. “Prudence? We’re ostriches. Heads in the sand, asses in the air.”

He pulled up the latest UAP footage—a tic-tac object maneuvering at Mach 10. “They aren’t hiding. Why are we?”

Chapter 4: The Decision

The room fell quiet. The screen flickered, overlaying Earth’s radio bubble—expanding at light speed for a century, a glowing sphere of TV broadcasts, radar pings, and nuclear EMPs that might just serve as an unintended extraterrestrial signal.

Elena broke the silence. “If they’re here, they already know who we are. The question isn’t if we signal. It’s what we say.”

Ray leaned back. “How about ‘We’re not all psychopaths’?”

Varen didn’t smile. “Or we prove it.”

Outside, the stars burned cold and distant. Waiting.

Epilogue: The First Message

Three months later, the Arecibo successor array sent a single, repeating sequence toward a UAP hotspot.

Not mathematics. Not science.

Music.
Beethoven’s “Ode to Joy.”

A handshake—or a plea.

The Dark Forest listened.

——————-

Author’s note
The character of Ray Faser (and his author) have been waiting for reactivation ever since their first and last appearance in a short science-fiction story in a school newspaper in 1979.

Reference:
The history of nuclear testing began early on the morning of 16 July 1945 at a desert test site in Alamogordo, New Mexico when the United States exploded its first atomic bomb. In the five decades between that fateful day in 1945 and the opening for signature of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) in 1996, over 2,000 nuclear tests were carried out all over the world.
https://www.un.org/en/observances/end-nuclear-tests-day/history

Arecibo message power vs Tsar Bomba Calculation
(Nuclear bomb sent 10 billion times more radio waves into space than Arecibo.) (PDF) Arecibo message power vs Tsar Bomba Calculation

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#fypシ゚

1962: Nuclear Radio Blast from Earth to the Stars: 10 billion times more powerful than the message from Arecibo for ET!


Did anyone hear us?

Just the calculations: https://www.academia.edu/127055674/Arecibo_vs_Tsar_Bomba

In 1974, the strongest intentional radio signal ever was sent into space by humans. It’s strength was an impressive 20 trillion watts. This is enough electricity to power 1.4 million homes for a year (Ref. 1). The Arecibo signal’s objective was to contact ET.

However, 12 years earlier, a considerably stronger radio signal was sent from Earth. The nuclear Russian Tsar Bomba burst in October 1961 delivered 5.3 yotta watts of energy. (That bomb was not intended to contact ET, but rather to intimidate the United States).

We know that five percent of a nuclear explosion’s energy is discharged as radio waves – the Tsar Bomba therefore fired 13.25 billion times more energy than the Arecibo broadcast.

Atmospheric Effects
In a nuclear explosion at a height of approximately 3,962.4 meters, like the Tsar Bomba, a significant portion of electromagnetic radiation, including gamma rays, X-rays, and ultraviolet rays, would be released into space. The exact percentage can vary, but it is estimated that about 70-80% of the electromagnetic radiation would escape into space, as the atmosphere at this altitude is thin enough to allow much of the radiation to pass through.

Taking an average of 75% as a guide, the Tsar Bomba radio blast was approximately 10 billion times stronger than the Arecibo message. A difference of 10 orders of magnitude.

But ARECIBO send a targeted message towards Hercules
Now let’s take into account that the Arecibo dish sent out a concentrated radio signal, not just showering the sky at random with radio waves like a nuclear explosion does. The radio power from Arecibo was directed towards the region of Hercules.

The Hercules cluster is quite expansive and covers about 3% of the visible sky and this is the same as the total sky. If we adjust the power output from the Tsar Bomba to 3% we get the following result:

10 billion x 0.03 = 300 million
So, all in all, the Tsar Bomba emitted 300 million times more radio power towards Hercules than Arecibo. Now, let’s consider for one second that the Earth nuclear explosion sprayed the entire sky with a radio signal 300 million times more powerful than Arecibo… everywhere!

Any ET with a radio is much more likely to hear Earth’s nuclear detonations, before the Arecibo SETI signal—12 years before, to be exact. But the Arecibo message was actually never meant to provide a realistic chance of contacting ETi, right? It was just a technology demonstration: (Ref.: Wikipedia: Arecibo message.)


What do nuclear explosions tell ET about Earth?

Nuclear explosions are fairly drastic events. The radio signatures of nuclear explosions are distinct. They speak of intelligence and stupidity at the same time.

Worldwide, more than 2,000 nuclear bombs have detonated since 1945. This madness ended in 1962, with the biggest explosion of them all, the Tsar Bomba.

TRIANGLE

Nuclear Trinity Test site, alleged Roswell UAP crash site, Air Base of nuclear bomber Enola Gay
Google maps

I am intrigued by the close proximity of these three sites to each other:
The first nuclear explosion at the Trinity test site occurred in 1945 approximately 62 miles from the reported 1947 Roswell UFO crash site in New Mexico.

Roswell was the home of the Walker Air Force base for the Enola Gay bomber, which delivered the first nuclear payload used in war to Hiroshima in 1945. The base was close to the alleged Roswell UFO crash site.

The Roswell UFO crash is not something I “believe” in on a regular basis.


Time moves backward

Let’s suppose there exist advanced extraterrestrials that have discovered a way to travel faster than light. Most physicists agree that this is impossible. Because according to Einstein’s theory of relativity, travelling faster than light means that time moves backward.

What if, at this very moment, extraterrestrials residing on a star 62 light-years away from Earth received the Tsar bomb’s electromagnetic pulse (EMP) and chose to determine its source?

They construct an FTL ship and direct it toward the area where Earth was 62 years ago in space.

They arrive in 1962 and learn about Earth’s history, and decide to go back even further in time, to 1945, to prevent the nuclear holocaust in Japan.

The Trinity test site, the site of the first nuclear explosion on Earth, and Walker Air Force Base, the airfield from where the Enola Gay bomber aircraft launched its first run, were both selected as their target locations.

But their mission failed, and they crash-landed in 1947, too late to change history. Temporal space calculations are inherently tricky, it seems. And maybe the past can’t be changed to make a substantial difference.

I’m not saying that we should set off nuclear bombs to attract the attention of ET. Earth has already done that.

Do you think ET sees these explosions as a threat? Or that they interpreted these as humanities appeals for help, like shipwrecked sailors setting off flares in the night?

I think the latter is the case.


WHO IS THERE?
Today, in 2025, 63 years have passed since the detonation of the Tsar Bomba. The EMP signal has travelled outward from Earth at the speed of light since then. Since then, it has reached and passed by over 1500 stars. In a 63 light-year radius, we find hundreds of systems that have Earthlike planets. Within 32.6 light-years alone, there are 104 exoplanets listed, as confirmed by the NASA Exoplanet Archive.

We should find extraterrestrial life within 60 light-years, if Earth is average, professor claims
https://phys.org/news/2023-09-extraterrestrial-life-light-years-earth-average.html

We should not be astonished if someone comes to check us out; it is a possibility.


Calculations
PDF & Equations: https://www.academia.edu/127055674/Arecibo_message_power_vs_Tsar_Bomba_Calculation


References:

Ref. 1: Duke Energy, What can you do with one terawatt hour?
https://news.duke-energy.com/releases/duke-energy-customers-surpass-1-terawatt-of-energy-savings-through-my-home-energy-report-program

Data Science Lab, Tsar Bomba Strength
https://dlab.epfl.ch/wikispeedia/wpcd/wp/t/Tsar_Bomba.htm

Effects of Nuclear Explosion
https://en.wikipedia.org/wiki/Effects_of_nuclear_explosions

SETI ORG Arecibo Message
https://www.seti.org/seti-institute/project/details/arecibo-message

Yotta Watt converter
https://www.convertunits.com/from/yottawatt/to/terawatt

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