What happens if an asteroid hits the ocean? Most of the asteroids pass over the earth safely. Scientists always keep monitoring asteroids in space to ensure the safety of the earth. But surely a question rises in people’s minds: “What happens if an asteroid hits the ocean?” Most of the earth, about 71%, is covered by the oceans, and the remaining part is land. So the ocean has more chances to be hit by the asteroid.
Is there any chance of having such a disaster or not? But if it becomes reality, then how powerful its impacts could be? Scientists believe in this theory or do not. Let’s cover all the queries related to this topic in this article.
Why Do Asteroids Often Hit the Ocean?
While discussing “What happens if an asteroid hits the earth?” Scientists mention more possibility of the asteroid hitting the ocean instead of land. This is because our earth contains more water than land. Most parts of the planet are covered with water, stretching across the Pacific, Atlantic, Arctic, Indian, and Southern oceans. Water covered around 71% of the Earth. That’s why asteroid impacts happen more in the ocean than on land. Scientists observe that around two-thirds of the asteroids throughout the earth’s history hit the ocean. Many asteroids that hit the ocean went unnoticed because they occurred in the deep sea far away from the land.
What Happens If an Asteroid Hits the Ocean?
If an asteroid hits the ocean, many disasters come at once. The destruction depends upon several factors like
- Size of asteroid
- Speed of asteroid
- Angle of asteroid
- Depth of the ocean
Mostly the speed of an asteroid is around 20 to 70 kilometers per second. When an asteroid hits the ocean at this incredibly high speed, it releases a massive amount of energy. Just like hundreds of nuclear bombs explode at the same time. When a large asteroid hits the earth with high speed, several disasters occur.
Massive Water Explosion
When the asteroid hits the ocean, first a massive explosion of water occurs in the ocean. An asteroid hitting the ocean at a high speed releases a tremendous amount of energy. This heat turns some ocean water into steam instantly. The strong force pushes water upward. The ocean water may rise several kilometers in the atmosphere. An asteroid explosion can produce a powerful shock wave that moves across the ocean and into the atmosphere.
A Giant Impact Crater in Water
The temporary formation of a giant water crater is another important part of what happens if an asteroid hits the ocean.
When an asteroid hits the ocean at a high speed, it forms a temporary giant crater in the ocean. An asteroid creates a high force that pushes water away and forms a cavity in the ocean. It creates a huge bowl-shaped hole that is called a crater. Unlike the land crater, it is not permanent because water quickly fills the space again. This crater can be several kilometers wide and deep; it totally depends on the size and the speed of the asteroid.
Powerful tsunami waves
While studying what happens if an asteroid hits the ocean, one of the dangerous impacts is powerful tsunami waves. A very large asteroid creates a powerful tsunami. Tsunamis can be hundreds of meters tall and travel several kilometers away from the impact point. When a massive asteroid hits the ocean, it creates a huge water crater, and then water refills the space quickly. This rapid displacement of water creates powerful waves across the ocean. This is called a tsunami.
The strength of the tsunami depends on several factors.
- Size of asteroid
- Speed of asteroid
- Distance of the impact point from the coast
- Depth of ocean
If a tsunami is strong enough to reach the land, it can destroy nearby coastal areas. Coastal areas may go underwater. A powerful current destroyed all the buildings and the infrastructure. Water can flood large cities and towns. Tsunami waves can cause serious damage to coastal regions if they reach land. The strength or the size of the tsunami depends on the size of the asteroid.
- If the size of the asteroid is 50 meters, then it can create regional tsunami waves.
- If the size of the asteroid is 300 meters, then it can create destructive coastal tsunami waves.
- If the size of the asteroid is 1 kilometer, then it can create massive tsunami waves.
Apophis asteroid passes over the earth in 2029
Could an Asteroid Ocean Impact Cause Global Damage?
The simple answer is “yes.” If a massive asteroid hits the ocean, it can cause damage to the entire planet. But it mainly depends on the size and speed of the asteroid.
If the asteroids are small, then they usually burn up in the earth’s atmosphere before reaching the land.
If the asteroids are medium-sized, after hitting the ocean, they can create powerful tsunami waves that cause damage to coastal areas. It destroys buildings and all the infrastructure of the cities and towns. The tsunami waves are much stronger near the impact site. They become weaker as they travel across the sea.
Extremely large-sized asteroids can become a global danger. When an extremely large asteroid hits the ocean, it could throw an enormous amount of water vapor, salt particles, and debris into the atmosphere. These materials block the sunlight and affect the climatic conditions. A large-sized asteroid is able to alter the global weather patterns. Only a several-kilometer-wide asteroid can give damage to the whole planet. But it is very rare to have such a massive disaster, once in millions of years. A famous example is the Cretaceous-Paleogene extinction event. It happened about 66 million years ago, which caused global atmospheric changes and wiped out about 75% to 80% of all the species, including dinosaurs.
Have Asteroids Hit Earth’s Ocean Before?
While discussing “What happens if an asteroid hits the ocean?” it is very important to look at historic real examples.
Asteroids hit the ocean many times in the past. Most of the asteroid impacts occurred in the ocean instead of on land because the ocean covers a major portion (around 71%) of the earth. Some of them were harder to notice because the evidence was hidden under the deep sea.
One famous example is the Eltanin asteroid, which hit the ocean around 2.5 million years ago in the South Pacific Ocean. Scientists found the evidence by analyzing the deep-sea sediments that contain unusual fragments of asteroid. Scientists believe that it was small and often creates powerful tsunami waves in the ocean. But it happened far from the land, so it remained unnoticed, and it did not cause any damage to populated areas.
Can We Stop An Asteroid From Hitting Earth?
Yes, scientists believe it may be possible to stop or change its direction before it hits the earth. If we are discussing this topic, then we have to understand the ways to prevent such impacts. Asteroids are very dangerous for earth, so our scientists have been doing their research for many years to protect our planet from such disasters. Scientists are actively working on some protective measures.
Kinetic Impactor Method
This method is used to change the direction of the asteroid. In this method a spacecraft is intentionally crashed into the asteroid. As a result, the path of the asteroid changes and passes over the earth safely.
In 2022 NASA used this method in the Double Asteroid Redirection Test (DART) mission. A spacecraft crashed into the asteroid to change its orbit. It proves that this is one of the most promising methods, named kinetic impactor.
Nuclear Deflection
In this method, we use a nuclear bomb in order to destroy the asteroid before it reaches the earth’s surface. This nuclear explosion not only destroys it, but it could also push it away from its orbit and change its path. This method is considered a last choice.
Gravity Tractor Method
In this method, we fly a spacecraft near the asteroid for a long time. A spacecraft has some gravitational pull that slightly changes an asteroid’s orbit over several years.
These are some methods in which scientists are working currently. But the most important factor is early detection of asteroids. If scientists observe a dangerous asteroid several years before, then only scientists can use their technology to change its path. So it is very important to keep monitoring in space in order to protect our planet.
Final Thought
In this article we all discuss “What happens if an asteroid hits the ocean?” As I explained before, it has a great impact that produces an enormous amount of energy and also turns some water into steam instantly. It can throw water and salt particles into the atmosphere that disturb climatic conditions. It can also make huge water craters and powerful tsunami waves. The strength and size of the tsunami waves depend on the size and speed of the asteroid. Extremely large asteroids could cause damage to the entire planet.
After the research of many years, scientists evolve our technology that can stop or redirect the asteroids to some extent. Now I hope you’ll understand “what happens if an asteroid hits the ocean?”