A tsunami has four general stages: initiation, split, amplification, and run-up. During initiation, a large set of ocean waves are caused by any large and sudden disturbance of the sea surface, most commonly earthquakes but sometimes also underwater landslides.

Abnormal ocean activity, a wall of water, and an approaching tsunami create a loud “roaring” sound similar to that of a train or jet aircraft. If you experience any of these phenomena, don’t wait for official evacuation orders. Immediately leave low-lying coastal areas and move to higher ground.”

Tsunami Information Statement: Relax.

1. Listen to evacuation orders and leave the area immediately if told to do so.
2. Take any pets with you.
3. Move inland (away from the ocean) and towards higher ground.
4. Stay away from the beach.

1. Avoid Inundation Areas: Site Buildings or infrastructure away from hazard area or locate on a high point. 2. Slow Water: Forests, ditches, slopes, or berms can slow down waves and filter out debris.

Witnesses have reported that an approaching tsunami is sometimes preceded by a noticeable fall or rise in the water level. If you see the ocean receding unusually rapidly or far it’s a good sign that a big wave is on its way. Go to high ground immediately.

500 mph

A distant source tsunami, like one generated from Chile, could take 14 hours or more to arrive. A regional source tsunami, like one generated from the Southwest Pacific, could take between one and three hours to arrive.

3.5 How long does a tsunami last? Large tsunamis may continue for days in some locations, reaching their peak often a couple of hours after arrival and gradually tapering off after that. The time between tsunami crests (the tsunami’s period) ranges from approximately five minutes to two hours.

Waves of this type are called Mega Tsunami. They are so great that they can reach several hundred meters in height, travel at the speed of a jet aircraft and get up to 12 miles (20 Kilometers) inland.

Vredefort crater

The dust is all that remains of the 7-mile-wide asteroid that slammed into the planet millions of years ago, triggering the extinction of 75% of life on Earth, including all nonavian dinosaurs.

In Ragnarok, Donnelly argued that an enormous comet struck the Earth approximately 12,000 years ago, destroying an advanced civilization on the “lost continent” of Atlantis.

66 million years ago

An object with a high mass close to the Earth could be sent out into a collision course with the asteroid, knocking it off course. When the asteroid is still far from the Earth, a means of deflecting the asteroid is to directly alter its momentum by colliding a spacecraft with the asteroid.

Ultimately, scientists estimate that an asteroid would have to be about 96 km (60 miles) wide to completely and utterly wipe out life on our planet.

On November 30, 1954, an Alabama woman, Ann Hodges, was struck by a meteorite while taking a nap. The meteorite crashed through the roof of her home in Sylacauga, Alabama, struck a radio, and then hit Hodges on her hip.

500 meteorites

A shooting star is really a small piece of rock or dust that hits Earth’s atmosphere from space. It moves so fast that it heats up and glows as it moves through the atmosphere. Shooting stars are actually what astronomers call meteors. Most meteors burn up in the atmosphere before they reach the ground.

Most meteors are travelling more slowly than the Earth as they orbit the Sun, so it is really the Earth travelling fast, the meteors more slowly. At that speed, the friction between the meteor and the air causes them to burn up high in the Earth’s atmosphere, and we see a flash of light, also known as a shooting star.

A shooting star, or ‘meteor’, is caused by a tiny piece of rock or dust burning up in the Earth’s atmosphere. If one was coming straight at you, it would appear as a brief flash of light at a single point in the sky – rather than the usual streak of light we associate with shooting stars.

Shooting stars must be observed without binoculars or telescope—it would be impossible to aim fast enough. It’s an event to watch with the naked eye. The better the sky (darker), the more shooting stars you’ll see. For this we must move away as much as possible from the light pollution of the population centres.