What Would Happen If the Internet Went Down for 24 Hours? Scientists' Simulations Reveal the Global Impact

Imagine waking up one morning and trying to check your WhatsApp messages. There's no connection. You try Instagram or Facebook—they're all inaccessible. You think it's just your home network that's having problems. But minutes later, the entire world realizes something much bigger is happening: the global internet has suddenly gone completely offline.

This isn't just a minor disruption. In simulations discussed by technology researchers and organizations like the Internet Society, this could trigger a domino effect that shakes the economy, communications, and modern life within hours.

Hour One: The Digital World Suddenly Silenced

In the first hour after the internet goes down, billions of devices lose connection.

Messages don't send. Emails don't arrive. Communication apps stop working.

Companies that rely on cloud services from platforms like Amazon Web Services, Google Cloud, and Microsoft Azure suddenly lose access to their servers.

For some, it feels like the world has suddenly stopped moving.

Hour 3: The Financial System Begins to Go haywire

Soon, the impact began to be felt in the financial sector.

Digital payments failed to process. Credit card machines stopped working. Online bank transfers were impossible.

Major stock exchanges like the New York Stock Exchange and NASDAQ would almost certainly have to temporarily halt trading because modern transaction systems rely entirely on global data networks.

In just a few hours, economic losses could reach billions of dollars.

Hour 8: Global Transportation Begins to Be Disrupted

Without the internet, many modern transportation systems lost coordination.

Ride-sharing apps like Uber and Grab immediately stopped operating.

Logistics companies couldn't track packages. Port and airport management systems became significantly slower due to the loss of real-time data access.

Imagine thousands of ships, planes, and delivery trucks suddenly losing their digital coordination system.

Hour 12: Information Turns to Chaos

Without the internet, people began to struggle to know what was really happening.

There were no online news portals. No social media for information updates.

Ironically, when the world loses its global network, rumors can spread even faster through face-to-face conversations and offline messages.

Some people are starting to wonder:

Is this a cyberattack? A satellite outage? Or something much bigger?

Hour 24: The World Realizes How Dependent We Are

After 24 hours without the internet, the impact is clear.

Businesses grind to a halt. Many companies are unable to operate. Global communications slow down drastically. Some public services are still operating, but far from normal.

Technically, shutting down the entire world's internet at once is extremely difficult, because the internet is designed as a distributed and redundant network. However, cybersecurity and digital infrastructure researchers acknowledge that there are several extreme but realistic scenarios that could lead to large-scale global internet disruptions.

Here are three of the most frequently discussed scenarios in network security studies.

1. Extreme Solar Superstorm

One of the greatest threats to the internet actually comes from outer space.

A phenomenon called a coronal mass ejection (CME) can hurl charged particles from the Sun toward Earth. If strong enough, these storms could:

damage communications satellites
disrupt power grids
destroy large transformers
disrupt undersea cables

A similar event occurred during the Carrington Event, the largest solar storm ever recorded. At that time, telegraph systems around the world were damaged and even sparked electrical arcs in cables.

According to researchers from NASA and the National Oceanic and Atmospheric Administration, if a storm of similar magnitude occurred today, the global internet infrastructure could be disrupted for days or even weeks.

2. Global Cyberattacks on Internet Infrastructure

The internet relies on several critical core components, such as:

root DNS servers
global routing protocols
major data centers

A large, coordinated cyberattack on these systems could have far-reaching consequences.

For example, in 2016, a Dyn cyberattack targeted the DNS company Dyn.

The attack rendered many major services inaccessible, including:

Twitter
Netflix
GitHub

While it didn't shut down the global internet, it demonstrated how a single critical infrastructure point can impact a large number of online services.

If such an attack were carried out globally against many infrastructure centers at once, the internet could be crippled on a large scale.

3. Mass Damage to Undersea Internet Cables

Most people assume the internet works through

More than 95% of global internet traffic travels through undersea fiber optic cables.

These cables connect continents and are managed by global companies and consortia such as:

Google
Meta Platforms
SubCom

If many major cables are damaged simultaneously—for example, by:

a major undersea earthquake
geopolitical sabotage
a military conflict at sea

then parts of the world could be cut off from the international internet.

Such disruptions have occurred regionally, for example, when an internet cable in the Mediterranean Sea was damaged in 2008, disrupting connections in the Middle East and Asia.