Eritrean sibyl in his prophetic song only once mentions the fall on our planet large celestial object, possibly an asteroid. Unfortunately, the text prediction contains only six lines. Then the song ends (lacuna) and details of this catastrophe we already know.

From heaven a great star will fall into the salt water,
Sea it will ignite and with him Babylon strongholds,
The land of Italy, a lot of guilt which killed
Devout Jews according to God's people.
Between vicious men you'll hurt yourself Vice,
An eternity later will stand quite desolate,

Song 5, 158-164.

Michel Nostradamus in one of his quatrains mentions probably about the same event - the fall of the " fire stone" in one of earth's seas.

2 - 18
New rain, sudden, violent,
Suddenly hurt the two armies.
Fire stone from the sky will fall in the sea of stone.
The sudden death of seven on earth and the sea.

Probably an asteroid or a comet gets closer to our planet at quite some distance, and as a result of influence of the gravitational field of the Earth will break up into smaller pieces ("new rain"). Large chip ("fire stone") will fall in ("stony sea", perhaps, one of the inland seas of the Mediterranean, the Aegean or Cretan, where there are many rocky Islands.
The sudden death of seven on earth and the sea is hardly a prophet in their predictions would be to mention the death of 7 people during the Holocaust. Probably, it is about the death of many people. From Nostradamus figure 7 indicates large indefinite quantity.

John the Theologian in his "revelation" mentions this disaster: "the Second angel sounded, and something like a great mountain burning with fire was cast into the sea : and the third part of the sea became blood." (Rev. 8:8).

Reports about the fall of the mysterious object on our planet and John Chrysostomos: "Second messenger sounded, and something like a great mountain of fire fell on the sea. And the third part of the sea became as blood; and the third part of all of the creatures which were in the sea, and the third part of the sailing ships were damaged...".

Some visionaries in his visions identify this mysterious celestial body with a comet. The clairvoyant of Ariim Vogt wrote in 1950: "I was standing on the sea and saw a huge wave of water approaching the shore. I was kinda far away from the globe. Looking down, I saw the terrible glow. I saw on the earth fall numerous particles. The following vision I have observed already on the Ground. War, chaos... another time I saw from afar the burning Earth. This vision all grew and grew. I thought: what to do? And found no answer. At this time the Earth was approaching a bright object, and something told me that this comet, and the particles falling on earth are pieces of the comet".

Italian be able, Angelucci in 1953, he predicted: "the Earth will face some comet, which initially can be seen from the Earth like a luminous point. Then it would be a catastrophe".

Swiss Eduard Mayer, who in trance (31 December 1976) predicts the future, says of future catastrophe: "there will be a meteor or a comet. It will fall in the sea and much heat the air. It will happen in a year divisible by three, the sum of digits of which is divided into three". He suggests that a comet will fall in the southern part of the Atlantic.

1. The American vision of the seer Raymond Aguilera (June 23, 1999), the Lord gave me a vision ball of light or of a meteor striking the earth's atmosphere with a powerful heat.
2. The vision of 28 may 2002: "I saw a round ball of fire in the earth's atmosphere, going down."
The probability of Earth collision with a large asteroid or comet is not equal to zero and this event sooner or later will ever happen. It is only a matter of time.
From the book "Prophecies of the Book of the Sibylline". Of "All", 2012