Arkfall

The Ark Belt are the remains of the Ark fleet that exploded in the Arkfall event of 2030 who remained in orbit, creating a ring of broken ships that surrounds the planet. Occasionally, some of this debris will succumb to the Earth's gravitational pull and fall to the surface. The terminology for fallen arks from Earth's orbit has since been: Arkfalls.

Once the arkfall has landed on Earth, it is usually salvaged by Ark Hunters, in an attempt to make a profit off of their finds. 

Common arkfalls are intermittent meteorite showers caused by falling debris from the Ark Belt. This includes everything from cargo pods to entirely intact sections of an Ark. These arkfalls can bring precious resources, alien technology, and sometimes nasty forms of life to the planet's surface. In some cases, smaller debris will burn up in the Earth's atmosphere, showering down upon the surface as a cloud of tiny metal shards known as Razor Rain.

At the end of the season 2, when terraforming devices were diverted from their original objective (the ground, the earth that the kaziri wanted to terraform), the rays emitted by the terraspheres hit the ark belt, detouring it and sending the debris away. With this we can assume that arkfalls stop. This theory is proven by the fact that we can fly again (in season 3 votanis collective project to transport nolan and irisa to the bresil by using an aircraft probably some kind of plane) even if little debries still orbiting away of earth (as see on the tzuros bridge).

Razor rain enter the atmosphere

Razor rain see from below

Razor rain see from the ground

A shuttle entering in the atmosphere

The burning shuttle view from bellow

A recently crash shuttle

The blast of the crash of such big ship can destroy everything in kilometers around

Significant Finds of Arkfall

Terra-spires

A terra-spire is an enormous missile-like structure that’s launched from an Ark and embeds itself under the surface of the planet below.

Terraspheres

Terraspheres are the "warheads" of the terra-spires – powerful balls of energy that contain alien DNA ready to be unleashed upon the target.

Terrasphere

Ark Cores

Ark-cores house the artificial intelligence required to control the terraforming process.

Cryo-Pods & Hypersleep Tubes

The Cryo-Pod is the section of an Ark that contains numerous Votans in hypersleep tubes. Partially intact hypersleep tubes are a rare find within arkfalls, but have been reported.

Aftermath

After the initial Arkfall disaster, there was a ring of debris left around the Earth.  Sometimes the debris will fall out of the ring and through the atmosphere, these events are Ark falls.